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NFPA Correlating Committee on Automatic Sprinkler Systems

M E M O R A N D U M

DATE: November 19, 2013

TO: Principal and Alternate Members of the Correlating Committee on Automatic

Sprinkler Systems

FROM: Matt Klaus, Principal Fire Protection Engineer/NFPA Staff Liaison

SUBJECT: AUT-AAC AGENDA PACKAGE – A2015 First Draft Meeting

________________________________________________________________________

Enclosed is the agenda for the First Draft meeting for NFPA 13, Standard for the Installation of

Sprinkler Systems, NFPA 13R Standard for the Installation of Sprinkler Systems in Low-Rise

Residential Occupancies, NFPA 13D Standard for the Installation of Sprinkler Systems in One-

and Two-Family Dwellings and Manufactured Homes, NFPA 24 Standard for the

Installation of Private Fire Service Mains and Their Appurtenances, and NFPA 291

Recommended Practice for Fire Flow Testing and Marking of Hydrants. The meeting will be

held on which will be held on December 11-12, 2013 at the Renaissance Blackstone Hotel in

Chicago, Illinois.

Included in this agenda package are the First Revisions created by the respective Technical

Committee. These FRs are currently being balloted by the committees, however once the ballots

are complete, we will provide you with access to the First Draft, as well as all of the components

which will make up the First Draft report, including Public Input, Committee Input, and all First

Revisions. These reports may also be found on the Document Information Pages for the

respective standards:

www.nfpa.org/13next

www.nfpa.org/13Rnext

www.nfpa.org/13Dnext

www.nfpa.org/24next

www.nfpa.org/291next

If you have suggestions for actions that the CC should take at this meeting, please come prepared

with proposed language. Allowable CC actions are provided on the following page.

For administrative questions, please feel free to contact Elena Carroll at (617) 984-7952.

For technical questions, please feel free to contact Matt Klaus at (617) 984-7448. You can

also reach either of us via e-mail at [email protected] or [email protected]. We look forward to

meeting everyone in Chicago.

http://www.nfpa.org/13next

http://www.nfpa.org/13Rnext

http://www.nfpa.org/13Dnext



mailto:[email protected]

mailto:[email protected]

NFPA Correlating Committee on Automatic Sprinkler Systems

The Correlating Committee (CC) actions that follow are subject to and within the

limitations of the Regulations Governing the Development of NFPA Standards (the

Regs) at 3.4. Actions shown fall into the category of Correlating Committee Input

(CCI), Correlating Note (CN) and First Correlating Revision (FCR). In general

terms, the following apply:

Correlating Committee Input (CCI): Similar to a Public Input (PI), but is

submitted prior to the PI closing date. Not applicable at First Draft (FD) or Second

Draft (SD) meetings. (See Regs at 4.3.3.1.) CCI is not in use at this December

2012 FD meeting. Correlating Note (CN): Clarification to a Technical Committee

(TC) to reconsider a Committee Input (CI), PI, or to review a First Revision (FR)

or CCI (See Regs at 4.3.11.2). CNs are balloted and appear in the FD Report if

they pass ballot.

First Correlating Revision (FCR): Used to delete or modify FRs or to generate the

equivalent of a new FR and must include a Correlating Committee Statement

(CCS) to support the change. An FR from the TC that is affected by a FCR

converts to a CI. (See Regs at 4.3.11.3) FCRs are balloted and appear in the FD

Report if they pass ballot.

Correlating Committee Statement (CCS):

A statement from the CC in support of an FCR.As is true with FRs, an FCR can

address only a contiguous block of text. An FCR cannot modify a text block on

which an FR exists. The FR must be changed to a CI, and the FCR must show all

the changes applicable to the text block.

Table of Contents

Part 1 - Meeting Agenda

Part 2 - Committee Address List

Part 3 – A2012 ROC Meeting Minutes

Part 4 - A2015 Key Dates

Part 5- Sprinkler Project First Revisions

Part 1 – Meeting Agenda

Correlating Committee on Automatic Sprinkler Systems

First Draft Meeting

December 11-12, 2013 Renaissance Blackstone Hotel

Chicago, Illinois

AGENDA

Wednesday, December 11, 2013

1. Call to Order – 8:00 AM (Linder)

2. Introductions of Members and Staff

3. Review and Approval of A2012 ROC Meeting Minutes

4. Review of A2015 Revision Cycle and Meeting Schedule

5. Review of Distributed Material and Workload

a. Overview of Public Input/FRs

b. Overview of Technical Committee Work

6. Technical Committee Chair Reports (order of reports subject to change) :

a. Technical Committee on Private Water Supply Piping Systems (Wagoner)

b. Technical Committee on Hanging and Bracing of Water-Based Fire protection

Systems (Biggins)

c. Technical Committee on Sprinkler System Installation Criteria (Noble)

d. Technical Committee on Sprinkler System Discharge Criteria (Leavitt)

e. Technical Committee on Residential Sprinkler Systems (Pilette)

7. New Materials

a. Discuss Potential Correlating Items from CC Members

Thursday, December 12, 2013

8. Reconvene 8:00AM (Time Subject to Change)

9. Adjournment 12:00 PM

Part 2 – Correlating Committee Roster

Address List No PhoneAutomatic Sprinkler Systems AUT-AAC

Matthew J. Klaus11/19/2013

AUT-AAC

Kenneth W. Linder

ChairSwiss Re2 Waterside Crossing, Suite 200Windsor, CT 06095

I 10/10/1997AUT-AAC

Jose R. Baz

PrincipalJRB Associates Group Inc.3876 SW 112th Ave., Suite 319Miami, FL 33165NFPA Latin American SectionAlternate: Donato A. Pirro

M 11/14/1997

AUT-AAC

Kerry M. Bell

PrincipalUL LLC333 Pfingsten RoadNorthbrook, IL 60062-2096Alternate: George E. Laverick

RT 10/10/1997AUT-AAC

Tracey D. Bellamy

PrincipalTelgian Corporation900 Circle 75 Parkway, Suite 680Atlanta, GA 30339The Home DepotAlternate: Ralph E. Bless, Jr.

U 10/29/2012

AUT-AAC

Russell P. Fleming

PrincipalNational Fire Sprinkler Association, Inc.40 Jon Barrett RoadPatterson, NY 12563-2164Alternate: Kenneth E. Isman

M 10/10/1997AUT-AAC

Scott T. Franson

PrincipalThe Viking Corporation210 North Industrial Park RoadHastings, MI 49058Alternate: Scott T. Martorano

M 1/18/2001

AUT-AAC

Michael J. Friedman

PrincipalFriedman Consulting, Inc.1 Bluestone RoadLutherville, MD 21093-4512

SE 3/21/2006AUT-AAC

Raymond A. Grill

PrincipalArup1120 Connecticut Avenue, NW, Suite 200Washington, DC 20036Alternate: Thomas C. Brown

SE 10/10/1997

AUT-AAC

Luke Hilton

PrincipalLiberty Mutual Property13830 Ballantyne Corporate Place, Suite 525Charlotte, NC 20277-2711

I 4/16/1999AUT-AAC

Alex Hoffman

PrincipalViking Fire Protection Inc.7885 North Fraser Way, Unit 140Burnaby, BC V5J 5M7 CanadaCanadian Automatic Sprinkler Association

IM 9/30/2004

AUT-AAC

Roland J. Huggins

PrincipalAmerican Fire Sprinkler Association, Inc.12750 Merit Drive, Suite 350Dallas, TX 75251Alternate: Donald D. Becker

IM 10/10/1997AUT-AAC

Sultan M. Javeri

PrincipalSC Engineering‘La Rose Des Vents’1, rue des BrulisVendrest, 77440 France

IM 10/10/1997

1



AUT-AAC

Charles W. Ketner

PrincipalNational Automatic Sprinkler Fitters LU 669Joint Apprenticeship & Training Committee7050 Oakland Mills RoadColumbia, MD 20732United Assn. of Journeymen & Apprentices of thePlumbing & Pipe Fitting Industry

L 1/10/2008AUT-AAC

Andrew Kim

PrincipalNational Research Council of CanadaInstitute for Research in Construction1200 Montreal Road, Building M-59Ottawa, ON K1A 0R6 CanadaAlternate: Joseph Su

RT 10/10/1997

AUT-AAC

John A. LeBlanc

PrincipalFM Global1151 Boston-Providence TurnpikePO Box 9102Norwood, MA 02062-9102Alternate: David B. Fuller

I 07/29/2013AUT-AAC

David O. Lowrey

PrincipalCity of Boulder Fire Rescue1805 33rd StreetBoulder, CO 80301

E 10/29/2012

AUT-AAC

Jeannene Yvonne Meisman

PrincipalReedy Creek Fire DepartmentPO Box 10170Lake Buena Vista, FL 32830

E 07/29/2013AUT-AAC

Brock Mitchell

PrincipalExtended Stay Hotels11525 N Community House RdSuite 100Charlotte, NC 28277

U 10/29/2012

AUT-AAC

John G. O'Neill

PrincipalThe Protection Engineering Group, PC14900 Bogle Drive, Suite 200Chantilly, VA 20151Alternate: J. Michael Thompson

SE 1/1/1977AUT-AAC

Garner A. Palenske

PrincipalAon Fire Protection Engineering Corporation11770 Bernardo Plaza Court, Suite 116San Diego, CA 92128Alternate: James G. Gallup

I 4/17/2002

AUT-AAC

J. William Sheppard

PrincipalSheppard & Associates, LLC24756 Tudor LaneFranklin, MI 48025

SE 10/10/1997AUT-AAC

Douglas Paul Stultz

PrincipalUS Department of the NavyNAVFAC MIDLANT, Code CI459742 Maryland AvenueBuilding Z-140, Room 126Norfolk, VA 23508Alternate: Brian Paul Carnazza

E 3/15/2007

AUT-AAC

Lynn K. Underwood

PrincipalAxis US Property303 West Madison Street, Suite 500Chicago, IL 60606Alternate: Adam Seghi

I 10/10/1997AUT-AAC

Donald D. Becker

AlternateRJC & Associates, Inc.PO Box 398Dallas Center, IA 50063-0398American Fire Sprinkler AssociationPrincipal: Roland J. Huggins

IM 10/10/1997

2



AUT-AAC

Ralph E. Bless, Jr.

AlternateTelgian Corporation900 Circle 75 Parkway, Suite 680Atlanta, GA 30339The Home DepotPrincipal: Tracey D. Bellamy

U 10/29/2012AUT-AAC

Thomas C. Brown

AlternateThe RJA Group, Inc.Rolf Jensen & Associates, Inc.14502 Greenview Drive, Suite 500Laurel, MD 20708Principal: Raymond A. Grill

SE 10/27/2005

AUT-AAC

Brian Paul Carnazza

AlternateUS Department of the NavyNAVFAC Mid-Atlantic9742 Maryland Ave., Bldg. Z-140, Room 103Norfolk, VA 23511Principal: Douglas Paul Stultz

E 03/05/2012AUT-AAC

David B. Fuller

AlternateFM Global1151 Boston Providence TurnpikePO Box 9102Norwood, MA 02062-9102Principal: John A. LeBlanc

I 7/26/2007

AUT-AAC

James G. Gallup

AlternateAon Fire Protection Engineering Corporation2810 North Tippecanoe AvenueTucson, AZ 85745Principal: Garner A. Palenske

I 10/29/2012AUT-AAC

Kenneth E. Isman

AlternateNational Fire Sprinkler Association, Inc.40 Jon Barrett RoadPatterson, NY 12563-2164Principal: Russell P. Fleming

M 10/10/1997

AUT-AAC

George E. Laverick

AlternateUL LLC333 Pfingsten RoadNorthbrook, IL 60062-2096Principal: Kerry M. Bell


Scott T. Martorano

AlternateThe Viking Corporation210 North Industrial Park RoadHastings, MI 49058Principal: Scott T. Franson

M 3/1/2011

AUT-AAC

Donato A. Pirro

AlternateElectro Sistemas De Panama, S.A.Ave. Ernesto T. LefevreParque LefevrePanama City, PanamaNFPA Latin American SectionPrincipal: Jose R. Baz

M 11/14/1997AUT-AAC

Adam Seghi

AlternateCoda Risk Analysis9624 Vista View DriveAustin, TX 78750Principal: Lynn K. Underwood

I 10/29/2012

AUT-AAC

Joseph Su

AlternateNational Research Council of Canada1200 Montreal Road, M-59Ottawa, ON K1A 0R6 CanadaPrincipal: Andrew Kim


J. Michael Thompson

AlternateThe Protection Engineering Group, PC14585 Avion Parkway, Suite 150Chantilly, VA 20151Principal: John G. O'Neill

SE 4/17/2002

3



AUT-AAC

James B. Biggins

Nonvoting MemberGlobal Risk Consultants Corporation15732 West Barr RoadManhattan, IL 60442-9012TC on Hanging & Bracing of Water-Based Systems

SE 7/28/2006AUT-AAC

Robert G. Caputo

Nonvoting MemberFire & Life Safety AmericaConsolidated Fireprotection, Inc.657 Cantara LaneVista, CA 92081TC on Foam-Water Sprinklers

SE 10/29/2012

AUT-AAC

William E. Koffel

Nonvoting MemberKoffel Associates, Inc.8815 Centre Park Drive, Suite 200Columbia, MD 21045-2107Safety to Life Correlating Committee


Russell B. Leavitt

Nonvoting MemberTelgian Corporation2615 South Industrial Park AvenueTempe, AZ 85282TC on Sprinkler System Discharge Criteria

U 10/28/2008

AUT-AAC

Joe W. Noble

Nonvoting MemberNoble Consulting Services, LLC6325 South Jones Blvd., #400Las Vegas, NV 89130TC on Sprinkler System Installation Criteria

E 4/17/1998AUT-AAC

Maurice M. Pilette

Nonvoting MemberMechanical Designs Ltd.19 Erie DrivePO Box 2188Natick, MA 01760TC on Residential Sprinkler Systems

SE 7/28/2006

AUT-AAC

Kenneth W. Wagoner

Nonvoting MemberParsley Consulting Engineers350 West 9th Avenue, Suite 206Escondido, CA 92025-5053TC on Private Water Supply Piping Systems


John J. Walsh

Member EmeritusUA Joint Apprenticeship CommitteeLocal 669502 Kings Farm Blvd., #302Rockville, MD 20850United Assn. of Journeymen & Apprentices of thePlumbing & Pipe Fitting Industry

SE 1/1/1974

AUT-AAC

Matthew J. Klaus

Staff LiaisonNational Fire Protection Association1 Batterymarch ParkQuincy, MA 02169-7471

12/16/2010

4

Part 3 – A2012 ROC Meeting Minutes

Technical Correlating Committee on Automatic Sprinklers

ROC Meeting

December 6, 2011

Windows Live Meeting and Conference Call

MEETING MINUTES

1. Call to Order. Acting TCC Chair Ken Linder called the meeting at 1 PM. 2. Self-Introductions of members and guests. Members of the committee introduced

themselves and reviewed the contact information. The meeting attendance list is attached to these minutes.

3. Review of Distributed Meeting Materials. Staff Liaison Matt Klaus provided an

overview of the agenda materials that were sent to the committee and posted on the committee web page.

4. Approval of A12-ROP Draft Meeting Minutes. The minutes of the A06-ROC Meeting

were reviewed and approved without modification.

5. Review of Meeting Procedures and Revision Process. Matt Klaus gave a presentation on the overall meeting guidelines and the NFPA Regulations Governing TCC operations.

6. NFPA Staff Update. Matt Klaus gave an update to the TCC on several topics that are summarized as follows:

a. Supplemental Operating Procedures- If desired, the TCC is permitted to pursue the development of supplemental operating procedures prior to the next revision cycle.

b. Supporting Material- NFPA is working with the submitters of supporting material to obtain copyright permission to distribute the material to the TC’s and TCC where they do not own the permissions.

c. Standards Council Update on Antifreeze- Council is looking for information and necessary testing to fill in the gaps of the original antifreeze reports pertaining to standard spray sprinklers.

d. Metrification Task Group – Once the 2013 Edition of NFPA 13 is printed, the Metrification Task Group will begin with a review to revise conversion for the 2016 edition.

7. Actions on Technical Committee Reports. The Chairs of each of the Technical Committees presented an overview of ROC committee actions for the TCC to consider and act on.

8. New Business

a. The TCC agreed to have Russ Fleming apply to the NFPA 96 TC as a representative of the TCC.

b. Russ Fleming will be leading a task group to review the NFPA 909 proposals regarding sprinklers. John O’Neill volunteered to be part of that group joining Bob Caputo, Rodney McPhee and Russ Leavitt from the TC’s.

9. Adjournment. The meeting adjourned at 4:30pm.

Meeting Attendees: Matt Klaus, NFPA Staff Liaison Kenneth Linder, Acting TCC Chair Scott Franson Michael Friedman Luke Hilton Alex Hoffman Roland Huggins Sultan Javeri Andrew Kim Russell Leavitt John O’Neill Garner Palenske J. William Sheppard Robert Spaulding Douglas Paul Stultz Lynn Underwood Donald Becker Thomas Brown David Fuller Kenneth Isman George Laverick Donato Pirro J. Michael Thompson Robert Gagnon William Koffel Maurice Pilette Kenneth Wagoner Guest Tracey Bellamy

Part 4 – A2015 Key Dates

2015 ANNUAL REVISION CYCLE *Public Input Dates may vary according to standards and schedules for Revision Cycles may change. Please check the NFPA Website for the most up‐to‐date information on Public Input Closing Dates and schedules at

www.nfpa.org/document # (i.e. www.nfpa.org/101) and click on the Next Edition tab.

Process Stage

Process Step

Dates for

TC

Dates forTC with CC

Public Input Closing Date* 7/8/2013 7/8/2013

Final Date for TC First Draft Meeting 12/13/2013 9/13/2013

Public Input Posting of First Draft and TC Ballot 1/31/2014 10/25/2013

Stage Final date for Receipt of TC First Draft ballot 2/21/2014 11/15/2013

(First Draft) Final date for Receipt of TC First Draft ballot ‐ recirc 2/28/2014 11/22/2013

Posting of First Draft for CC Meeting 11/29/2013

Final date for CC First Draft Meeting 1/10/2014

Posting of First Draft and CC Ballot 1/31/2014

Final date for Receipt of CC First Draft ballot 2/21/2014

Final date for Receipt of CC First Draft ballot ‐ recirc 2/28/2014

Post First Draft Report for Public Comment 3/7/2014 3/7/2014

Public Comment Closing Date for Paper Submittal* 4/11/2014 4/11/2014

Public Comment Closing Date for Online Submittal (e‐PC)* 5/16/2014 5/16/2014

Final Date to Publish Notice of Consent Documents (Standards that received no Comments)

5/30/2014 5/30/2014

Appeal Closing Date for Consent Standards (Standards that received no Comments)

6/13/2014 6/13/2014

Final date for TC Second Draft Meeting 10/31/2014 7/25/2014

Comment Posting of Second Draft and TC Ballot 12/12/2014 9/5/2014

Stage Final date for Receipt of TC Second Draft ballot 1/2/2015 9/26/2014

(Second Final date for receipt of TC Second Draft ballot ‐ recirc 1/9/2015 10/3/2014

Draft) Posting of Second Draft for CC Meeting 10/10/2014

Final date for CC Second Draft Meeting 11/21/2014

Posting of Second Draft for CC Ballot 12/12/2014

Final date for Receipt of CC Second Draft ballot 1/2/2015

Final date for Receipt of CC Second Draft ballot ‐ recirc 1/9/2015

Post Second Draft Report for NITMAM Review 1/16/2015 1/16/2015

Tech Session Notice of Intent to Make a Motion (NITMAM) Closing Date 3/6/2015 3/6/2015

Preparation Posting of Certified Amending Motions (CAMs) and Consent Standards

5/1/2015 5/1/2015

(& Issuance) Appeal Closing Date for Consent Standards 5/16/2015 5/16/2015

SC Issuance Date for Consent Standards 5/26/2015 5/26/2015

Tech Session Association Meeting for Standards with CAMs 6/22‐25/2015 6/22‐25/2015

Appeals and Appeal Closing Date for Standards with CAMs 7/15/2015 7/15/2015

Issuance SC Issuance Date for Standards with CAMs 8/20/2015 8/20/2015

Approved___ October 18, 2011 _ Revised__March 7, 2013_____________

Part 5 – Sprinkler Project First Revisions

NFPA 13 First Revisions

First Revision No. 141-NFPA 13-2013 [ Global Input ]

8.15.1.2.18 Exterior Soffits, Eaves, Overhangs, and Decorative FrameElements.

Submitter Information Verification

Submitter Full Name: [ Not Specified ]

Organization: [ Not Specified ]

Street Address:

City:

State:

Zip:

Submittal Date: Thu Aug 22 11:09:03 EDT 2013

Committee Statement

CommitteeStatement:

This section is intended to apply to exterior building features only. This is simply aclarification and not a technical change.

ResponseMessage:

Public Input No. 506-NFPA 13-2013 [Section No. 8.15.1.2.18.4]

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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16.1.10.1 In double-row and multiple-row open racks without solid shelves, a longitudinal (back-to-backclearance between loads) flue space shall not be required.16.2 Protection Criteria for Open Rack Storage of Class I Through Class IV Commodities Stored Upto and Including 25 ft (7.6 m) in Height.

16.2.1.3.3 Multiple-Row Racks — Storage Height Over 12 ft (3.7 m) Up to and Including 25 ft (7.6 m)Without Solid Shelves.

16.2.1.4.1.1 In single- or double-row racks without solid shelves, in-rack sprinklers shall be installed inaccordance with Table 16.2.1.3.2.

16.2.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for Class Ithrough Class IV commodities shall be in accordance with Table 16.2.2.1.

Table 16.2.2.1: First column:

Storage Arrangement

Single-, double-, and multiple-row racks without solid shelves (no open-top containers)

Table 16.2.3.1 ESFR Sprinkler Protection of Rack Storage Without Solid Shelves of Class I ThroughClass IV Commodities Stored Up to and Including 25 ft (7.6 m) in Height

16.3 Protection Criteria for Open Rack Storage of Class I Through Class IV Commodities StoredOver 25 ft (7.6 m) in Height.

16.3.1.1* For single- and double-row racks, the water demand for nonencapsulated storage without solidshelves separated by aisles at least 4 ft (1.2 m) wide and with not more than 10 ft (3.1 m) between the topof storage and the sprinklers shall be in accordance with Table 16.3.1.1.

A.16.3.1.1 Water demand for storage height over 25 ft (7.6 m) on racks without solid shelves separated byaisles at least 4 ft (1.2 m) wide and with more than 10 ft (3.1 m) between the top of storage and thesprinklers should be based on

16.3.1.2 For multiple-row racks, the water demand for nonencapsulated storage without solid shelvesseparated by aisles at least 4 ft (1.2 m) wide and with not more than 10 ft (3.1 m) between the top ofstorage and the sprinklers shall be in accordance with Table 16.3.1.2.

16.3.1.3.1.1* Double-Row Racks.

(A) In double-row racks without solid shelves and with a maximum of 10 ft (3.1 m) between the top ofstorage and the ceiling, in-rack sprinklers shall be installed in accordance with Table 16.3.1.1 and Figure16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j). The highest level of in-rack sprinklers shall be not morethan 10 ft (3.1 m) below the top of storage. Where a single-row rack is mixed with double-row racks, Table16.3.1.1 and Figure 16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j) shall be used.

16.3.1.3.1.2* Single-Row Racks.

(A) In single-row racks without solid shelves with storage height over 25 ft (7.6 m) and a maximum of 10 ft(3.1 m) between the top of storage and the ceiling, sprinklers shall be installed in accordance with Figure16.3.1.3.1.2(A)(a) through Figure 16.3.1.3.1.2(A)(e).

Table 16.3.1.1 Single- or Double-Row Racks Without Solid Shelves of Class I Through Class IVCommodities Stored Over 25 ft (7.6 m) in Height with Aisles 4 ft (1.2 m) or More in Width

16.3.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for Class Ithrough Class IV commodities shall be in accordance with Table 16.3.2.1.

Table 16.3.2.1: First Column

Storage Arrangement


Table 16.3.3.1 ESFR Sprinkler Protection of Rack Storage Without Solid Shelves of Class I ThroughClass IV Commodities Stored Over 25 ft (7.6 m) in Height

17.1.9.1 In double- and multiple-row open racks without solid shelves, a longitudinal (back-to-backclearance between loads) flue space shall not be required.


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17.2 Protection Criteria for Open Rack Storage of Plastics Commodities Stored Up to and Including25 ft (7.6 m) in Height.

17.2.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for unexpandedplastic commodities shall be in accordance with Table 17.2.2.1.

Table 17.2.2.1 CMSA Sprinkler Design Criteria for Single-, Double-, and Multiple-Row Racks WithoutSolid Shelves of Plastics Commodities Stored Up and Including 25 ft (7.6 m) in Height

And First Column:


Table 17.2.3.1 ESFR Protection of Rack Storage Without Solid Shelves of Plastics CommoditiesStored Up to and Including 25 ft (7.6 m) in Height

17.3 Protection Criteria for Open Rack Storage of Plastics Commodities Stored Over 25 ft (7.6 m) inHeight.

17.3.2.1 Protection of single-, double-, and multiple-row rack storage without solid shelves for cartoned,nonexpanded plastic commodities shall be in accordance with Table 17.3.2.1.

Table 17.3.2.1 CMSA Sprinkler Design Criteria for Single-, Double-, and Multiple-Row Racks WithoutSolid Shelves of Plastics Commodities Stored Over 25 ft (7.6 m) in Height

And First Column:

Single-, double-, and multiple-row, racks without solid shelves plastics (no open-top containers)

Table 17.3.3.1 ESFR Protection of Rack Storage Without Solid Shelves of Plastics CommoditiesStored Over 25 ft (7.6 m) in Height




Street Address:

City:

State:

Zip:

Submittal Date: Sun Aug 25 09:35:14 EDT 2013

Committee Statement

CommitteeStatement:

It was previously unstated that racks without solid shelves meant open racks. Last cycle removedsome references to w/o solid shelves due to the recognition that we do use the criteria for open rackswhen they have solid shelves when combined with solid shelving criteria as shown by deletingwithout solid shelves from Table 16.2.1.3.2 and adding section 16.2.3.2. It was not applied overall.This change is intended to be just editorial in applying that understanding. Although the change tothe title 16.2 covers the CMSA and ESFR, it may be worth repeating the open rack statement withintheir sections.

ResponseMessage:

Public Input No. 85-NFPA 13-2013 [Global Input]


3 of 474 11/7/2013 12:33 PM


Throughout the standard, change "uncartoned" to "exposed", "nonexpanded" to "unexpanded" and"unencapsulated" to "nonencapsultated"




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

During the previous cycle, in Proposal 13-449, the submitter requested that in the rewrite of Chapter17 these changes be made, so that the text would be standardized with the Decision Tree, Figure17.1.2.1. In the Committee Meeting Action this appears to have been accepted, but it does notappear to have been fully put into effect in Chapter 17. Further to this, those same revisions shouldbe made throughout the standard. For clarity, the verbiage used should always be consistent.

ResponseMessage:





Public Input No. 295-NFPA 13-2013 [Section No. 16.2.3.1]

Public Input No. 296-NFPA 13-2013 [Section No. 21.2.2]



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Additionally, revise the term “plastic and rubber” to “Group A plastic” in the following locations:

15.2.7 Table 15.2.6(a) Table 15.2.6(b) 15.3 15.3.1 15.4 15.4.4 Table 15.3.1 Table 15.4.1




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

As currently written it is unclear which sections in Chapter 15 are referring to plastic and rubbercommodities in general and which sections are speaking specifically to plastics and rubber that fit theGroup A plastic classification. Further, since the majority of Chapter 15 (ie. everything after 15.2.5)actually deals with just Group A commodities, the text seems to suggest that all rubber commoditiesare considered to be Group A plastics. Because 5.6.4 explains which rubber products are Group Aand which are classified as Class B, it is not necessary to repeatedly refer to “rubber” after 15.2.2.

ResponseMessage:



5 of 474 11/7/2013 12:33 PM


Also revise the terms “plastic” and “plastics” to “Group A plastic” in the following locations:

17.1.2.2 Table 17.1.4.1 17.2 17.2.1 Figures 17.2.1.4(a) through 17.2.1.4(l) 17.2.2 17.2.2.1

17.2.3 Table 17.2.2.1 17.2.3.1 Table 17.2.3.1 17.3 17.3.1 Table 17.3.1.3 17.3.1.6 17.3.1.7

Figure 17.3.1.7 Figures 17.3.1.8(a) through 17.3.1.8(f) Table 17.3.1.15 17.3.2 17.3.2.1 Table17.3.2.1

17.3.3 17.3.3.1 Table 17.3.3.1




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

As currently written it is unclear which sections in Chapter 17 are referring to plastic and rubbercommodities in general and which sections are speaking specifically to materials that fit the Group Aplastic classification. Section 17.1.2.6 is actually speaking to Group A plastics, as are all succeedingreferences to plastic throughout the rest of Chapter 17. For clarity, it should be specifically stated.

ResponseMessage:



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16.3.1.1* For single- and double-row racks, the water demand for nonencapsulated storagewithout solid shelves separated by aisles at least 4 ft (1.2 m) wide and with not morethan a clearance to ceiling up to and including 10 ft (3.1 m) between the top of storage andthe sprinklers shall be in accordance with Table 16.3.1.1.

16.3.1.2 For multiple-row racks, the water demand for nonencapsulated storage withoutsolid shelves separated by aisles at least 4 ft (1.2 m) wide and with not more than aclearance to ceiling up to and including 10 ft (3.1 m) between the top of storage and thesprinklers shall be in accordance with Table 16.3.1.2.

17.2.1 Control Mode Density/Area Sprinkler Protection Criteria for Single-, Double-,and Multiple-Row Racks for Plastics Commodities Stored Up to and Including 25 ft(7.6 m) in Height, with a Clearance to Ceiling Up to and Including 10 ft (3.1 m).

17.2.1.2.1 For Group A plastic commodities in cartons, encapsulated or nonencapsulatedin single-, double-, and multiple- row racks and with a clearance to ceiling up to andincluding 10 ft. (3.1 m), ceiling sprinkler water demand in terms of density [gpm/ft2(mm/min)] and area of operation [ft2 (m2)] shall be selected from Figure 17.2.1.2.1(a)through Figure 17.2.1.2.1(f).

17.3.1.1 Protection of Group A plastics in cartons, expanded or nonexpanded, whetherencapsulated or nonencapsulated racks and with a clearance to ceiling up to and including10 ft. (3.1 m), shall be permitted using control mode density/area sprinklers in accordancewith 17.3.1.

17.3.1.2 Protection of Group A plastics that are exposed and nonexpanded, whetherencapsulated or nonencapsulated racks and with a clearance to ceiling up to and including10 ft. (3.1 m), shall be permitted only using in-rack sprinkler arrangements that arespecifically permitted to be used with exposed nonexpanded plastics.




Street Address:

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Committee Statement

CommitteeStatement:

No consistency on how the clearance to ceiling is identified. 16.2 uses "between top of storageand sprinklers", 17.2 identifies the requirement only in the title, and 17.3 does not state it at all.(Used the same phrase from 17.2 for consistency)

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23.7 23.5 Pipe Schedules

23.5 23.6 Deluge Systems

23.6 23.7* Exposure Protection Sprinkler System

23.4.5 23.8 In-Rack Sprinklers

23.4.6 23.9 Hose Allowance




Street Address:

City:

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Zip:

Submittal Date: Mon Aug 26 13:01:27 EDT 2013

Committee Statement

CommitteeStatement:

23.6 and 23.7 are both hydraulically calculated systems so are more easy found if theyimmediately follow the hydraulic calculation procedures. 23.8 and 23.9 are part of the hydrauliccalculation procedure so should be located in the section on hydraulic calculation procedures. Pipeschedule criteria should come after the hydraulic related material

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This Revision reaffirms the Committees position on the TIAs that were generated after the ROC meetingduring the A12 revision cycle.

Supplemental Information

File Name Description

13_P_29_Rec_from_TIA.FR284.pdf


Submitter Full Name: Jeanne Moreau-Correia

Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Thu Oct 03 08:41:29 EDT 2013

Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition orsituation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change our


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justifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

ResponseMessage:



10 of 474 11/7/2013 12:33 PM

Report on Proposals – June 2015 NFPA 13_______________________________________________________________________________________________13- Log #12 AUT-SSI

_______________________________________________________________________________________________

Terry L. Victor, Tyco/SimplexGrinnell

A mixture of an antifreeze material with water that is prepared and factory mixedby the manufacturer with a quality control procedure in place that ensures that the antifreeze solution remainshomogeneous and that the concentration is as specified.

The use of antifreeze solutions shall be in conformity with state and local health regulations.

Antifreeze shall not be used in ESFR systems unless at least one of the following two conditions is met theESFR sprinkler is listed for use with the antifreeze solution.(1) For antifreeze solutions not referenced in this standard, the antifreeze solution shall be specifically listed for ESFRapplications.(2) For antifreeze solutions referenced in this standard, the ESFR sprinkler shall be specifically listed for use with theantifreeze solution.(3) The ambient temperature of the protected area shall be above 25°F (-4°C) and a propylene glycol mixture of notgreater than 25% by volume is provided. [

Except as permitted in 7.6.2.2, antifreeze solutions shall be listed for use in sprinkler systems. Antifreezesolutions shall be premixed by the manufacturer.

Premixed antifreeze solutions of propylene glycol shall be permitted to be used with ESFR sprinklers where theESFR sprinklers are listed for such use in a specific application.

Antifreeze solutions shall be limited to premixed antifreeze solutions of glycerin (chemically pure or UnitedStates Pharmacopoeia 96.5%) at a maximum concentration of 48% by volume, or propylene glycol at a maximumconcentration of 38% by volume.

Premixed antifreeze solutions of propylene glycol exceeding 40% concentration by volume shall be permittedfor use with ESFR sprinklers where the ESFR sprinklers are listed for such use in a specific application.

Premixed antifreeze solutions other than those described in 7.6.2.1 that are listed for use in sprinkler systemsshall be permitted to be used.

All premixed antifreeze solutions shall be provided with a certificate from the manufacturer indicating the typeof antifreeze, concentration by volume, and freezing point.

Glycerine–water and propylene glycol–water mixtures shown in Table A.7.6.2.2 shall be considered suitable foruse.

A premix antifreeze solution with a freezing point below the expected minimum temperature for the locality shallbe provided.

1Printed on 1/24/2013

Report on Proposals – June 2015 NFPA 13Automatic sprinklers in areas subject to freezing shall be on dry pipe systems conforming to Section 7.2, on

antifreeze systems conforming to Section 7.6, or be dry sprinklers of an adequate length connected to wet pipe systemslocated in heated areas.

Information about listed antifreeze solution used (type and amount).

For antifreeze solutions systems greater than 40 gal (151 L) in size, the friction loss shall also be calculatedusing the Darcy–Weisbach formula:(no change to Equation)

7

The definition of an antifreeze system states that water will discharge after the antifreeze leaves the pipes.Systems that are all antifreeze, including tanks of antifreeze solution that will not discharge plain water, are not trueantifreeze systems. Such systems should not be used without consideration to issues such as the combustibility of theantifreeze solution and the friction loss in the piping during cold conditions. Any listing associated with an antifreezesprinkler system should address the inability for the specific antifreeze solution tested to ignite when discharged fromspecific sprinklers.

Listed CPVC nonmetallic sprinkler pipe and fittings should be protected from freezing with glycerine compatiblelisted solutions only. In addition, due to antifreeze solution limitations other methods of freeze protection such as electricheat-tracing, or insulated coverings, which are approved for use on CPVC nonmetallic piping may be used to protectCPVC nonmetallic pipes from freezing. The use of diethylene, ethylene, or propylene glycols is specifically prohibited.Laboratory testing shows that glycol-based antifreeze solutions present a chemical environment detrimental to CPVC.

The following is a list of research reports that have been issued by the Fire Protection Research Foundation related tothe use of antifreeze in sprinkler systems:

, Fire ProtectionResearch Foundation, June 2010.

, Fire Protection ResearchFoundation, December 2010.

, Fire Protection Research Foundation,February 2012.

INSERT Table in A.7.6.2_L12_R

Where existing antifreeze systems have been analyzed and approved to remain in service, antifreezesolutions should be limited to premixed antifreeze solutions of glycerin (chemically pure or United StatesPharmacopoeia 96.5%) at a maximum concentration of 48% by volume, or propylene glycol at a maximumconcentration of 38% by volume. [ROP-33] The use of antifreeze solutions in all new sprinkler systems should berestricted to listed antifreeze solutions only. Where existing antifreeze systems are in service, the solution concentrationshould be limited to those noted in A.7.6.2.1 and the system requires an analysis and approval of the AHJ to remain inservice.

See the premixed antifreeze manufacturer’s technical data sheets to determine the freeze point of thesolution.


Report on Proposals – June 2015 NFPA 13

All permitted antifreeze solutions are heavier than water. At the point of contact (interface), the heavier liquidwill be below the lighter liquid, preventing diffusion of water into the unheated areas.

The information provided in the Fire Protection Research Foundation report “Antifreeze SolutionsSupplied through Spray Sprinklers: Interim Report” illustrates that under certain conditions (pressure, fire size, k-factor,ceiling height, deflector design…etc) a 50% glycerine solution is capable of igniting and causing a dramatic increase inheat release rate. As noted in the FPRF report, these results highlight the “complicated interaction between sprinklerspray and the ignition source.”As a result of this additional testing, there are more questions that need to be answered,and the testing shows that concentrations of anti-freeze that previous testing indicated were acceptable and would notsupport combustion actually do with a stronger ignition source. In addition, sprinklers with larger orifices that requirelower pressure than typical residential sprinklers and potentially a lager droplet distribution also ignited. It is clear thatfurther testing is need to fully understand under what conditions an anti-freeze solutions are safe, anti-freeze solutionscan not be allowed in sprinkler systems.

This TIA calls for the use of Listed Antifreeze Solutions. Using listed antifreeze solutions will ensure that the solutiondischarged from a sprinkler system will not ignite or cause a dramatic increase in heat release rate of a fire. Theprocess for developing listed products will also allow for a continued improvement in fire and life safety in environmentsmeeting the NFPA Codes and Standards.

This TIA also calls for the continued acceptance of currently listed ESFR Antifreeze Systems. The listing process hasalready shown that, in some cases, it is possible to use current antifreeze solutions to provide the level of protectionprescribed by NFPA 13. For this reason, it is proposed to allow the continued use of propylene-glycol solutions insystems and in protection scenarios that have been thoroughly tested to demonstrate such results. There are ESFRsystems currently available that have been specifically tested and listed with a specific model of sprinkler and solutiondelivery method that provide an appropriate level of protection as to be considered “Early Suppression”.

The latest testing from The Fire Protection Research Foundation titled(dated February 2012) shows that anti-freeze concentrations

currently allowed in new NFPA 13 sprinkler systems may support combustion and increase the size of the fire. This is asafety issue that requires changes in the standard.

The following are two items which make this TIA of emergency nature. Only one is required for substantiation of anemergency nature.

(d)During the latest revision cycle the committee evaluated the

test data that was present at the time of the cycle. The committee could not anticipate that additional data wouldchange our justifications during the process. The new data demonstrates that variables utilized in the development ofthe 2013 edition may lead to changes in the fire involvement.

Propylene glycol and glycerin antifreeze solutions discharged from sprinklers have the potential to ignite under certainconditions. Research testing has indicated that several variables may influence the potential for large scale ignition ofthe antifreeze solution discharged from a sprinkler. These variables include, but are not limited to, the concentration ofantifreeze solution, sprinkler discharge characteristics, inlet pressure at the sprinkler, location of fire relative to thesprinkler, and size of fire at the time of sprinkler discharge.

Antifreeze solutions have been subject to recent testing andthe new data shows that the installations found within the standard do not account for the complete safety of theoccupant. The data appears to provide additional questions and challenges the parameters of installation found in thestandard.

The use of propylene glycol and glycerin antifreeze solutions should only be considered when other sprinkler systemdesign alternatives are not available or practical. If these solutions are used, all relevant data and information should becarefully reviewed and considered in the sprinkler system.


Report on Proposals – June 2015 NFPA 13



The revision reconfirms the committees position on the TIAs that were generated after the ROC meetingduring the A12 revision cycle.

See attached TIA



13_P_29_Rec_from_TIA.G1359051993614.pdf



Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Sun Oct 06 18:51:19 EDT 2013

Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition or


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situation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

ResponseMessage:



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The revision reconfirms the committees position on the TIAs that were generated after the ROC meetingduring the A12 revision cycle.

See attached.



13_P_29_Rec_from_TIA.G1359052084306.pdf



Organization: NFPA

Street Address:

City:

State:

Zip:

Submittal Date: Sun Oct 06 19:36:35 EDT 2013

Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition or


13 of 474 11/7/2013 12:33 PM

situation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

ResponseMessage:

Public Input No. 34-NFPA 13-2013 [Section No. 23.4.2.1.3]


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Extract Chapter 10 from NFPA 24 2016 Ed as Chapter 10 of NFPA 13 2016 ed.



Chapter_10_Compare.docx




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Chapter 10 of NFPA 13 is extracted from NFPA 24. This Global Input updates Chapter 10 ofNFPA 13 to the new language in NFPA 24 2016 ed.

ResponseMessage:


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Important Notice: The document has been provided in Microsoft Word format for the purpose of Technical Committee/Task Group work. This document is the copyright property of the National Fire Protection Association (NFPA), Copyright © 2012 NFPA, and may not be used for any other purpose or distributed to any other persons or parties outside of the NFPA Technical Committee.

Chapter 10 Underground PipingRequirements

10.1* Piping Materials.

10.1.1* Listing. Piping shall be listed for fire protection service or shall comply with the standards in Table 10.1.1.

10.1.1 All piping used in private fire service mains shall be in accordance with 10.1.1.1, 10.1.1.2 or 10.1.1.3.

10.1.1.1 Piping manufactured in accordance with Table 10.1.1.1 shall be permitted to be used.

Table 10.1.1.11 Manufacturing Standards for Underground Pipe

Materials and Dimensions Standard

Ductile Iron

Cement Mortar Lining for Ductile Iron Pipe and Fittings for Water AWWA C104

Polyethylene Encasement for Ductile Iron Pipe Systems AWWA C105

Ductile Iron and Gray Iron Fittings, 3 in. Through 48 in., for Water and Other Liquids

AWWA C110

Rubber-Gasket Joints for Ductile Iron Pressure Pipe and Fittings AWWA C111

Flanged Ductile Iron Pipe with Ductile Iron or Gray Iron Threaded Flanges AWWA C115

Protective Fusion-Bonded Epoxy Coatings for the Interior and Exterior Surfaces of Ductile-Iron and Gray-Iron Fittings for Water Supply Service

AWWA C116

Thickness Design of Ductile Iron Pipe AWWA C150

Ductile Iron Pipe, Centrifugally Cast for Water AWWA C151

Ductile-Iron Compact Fittings for Water Service AWWA C153

Standard for the Installation of Ductile Iron Water Mains and Their Appurtenances

AWWA C600

Steel

Steel Water Pipe 6 in. and Larger AWWA C200

Coal-Tar Protective Coatings and Linings for Steel Water Pipelines Enamel and Tape — Hot Applied

AWWA C203

Cement-Mortar Protective Lining and Coating for Steel Water Pipe 4 in. and Larger — Shop Applied

AWWA C205

Formatted: span5

Formatted Table


Field Welding of Steel Water Pipe AWWA C206

Steel Pipe Flanges for Waterworks Service — Sizes 4 in. Through 144 in. AWWA C207

Dimensions for Fabricated Steel Water Pipe Fittings AWWA C208

A Guide for Steel Pipe Design and Installation AWWA M11

Concrete

Reinforced Concrete Pressure Pipe, Steel-Cylinder Type AWWA C300

Prestressed Concrete Pressure Pipe, Steel-Cylinder Type AWWA C301

Reinforced Concrete Pressure Pipe, Non-Cylinder Type AWWA C302

Reinforced Concrete Pressure Pipe, Steel-Cylinder Type, Pretensioned AWWA C303

Standard for Asbestos-Cement Distribution Pipe, 4 in. Through 16 in., for Water Distribution Systems

AWWA C400

Standard for the Selection of Asbestos-Cement Pressure Pipe AWWA C401

Cement-Mortar Lining of Water Pipe Lines 4 in. and Larger — in Place AWWA C602

Standard for the Installation of Asbestos-Cement Water Pipe AWWA C603

Plastic

Polyvinyl Chloride (PVC) Pressure Pipe, 4 in. Through 12 in., for Water Distribution

AWWA C900

Polyvinyl Chloride (PVC) Pressure Pipe, 14 in. Through 48 in., for Water Distribution

AWWA C905

Polyethylene (PE) Pressure Pipe and Fittings, 4 in. (100 mm) Through 63 in. (1575 mm) for Water Distribution

AWWA C906

Molecularly Oriented Polyvinyl Chloride (PVCO) 4-24 in…… AWWA C909

CopperBrass

Specification for Seamless Red Brass Pipe

ASTM B43

Copper Specification for Seamless Copper Tube

ASTM B 75

Specification for Seamless Copper Water Tube ASTM B 88

Requirements for Wrought Seamless Copper and Copper-Alloy Tube ASTM B 251

10.1.1.2 Steel Pipe. Steel piping shall not be used for general underground service unless* Piping specifically listed for such serviceuse in private fire service mains shall be permitted to be used.

Formatted: span2, Font: (Default) serif, 11 pt

Formatted Table

Formatted: span5

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10.1.3 Steel Pipe Used with Fire Department Connections.1.2.1 Where listed pipe is used, it shall be installed in accordance with the listing limitations including installation instructions.

10.1.1.2.2 Where listing limitations or installation instructions differ from the requirements of this standard, the listing limitations and installation instructions shall apply.

10.1.1.3 Steel piping manufactured in accordance with Table 10.1.1.3 that is externally coated and wrapped and internally galvanized, steel pipe shall be permitted to be used between the check valve and the outside hose coupling for(s) on the fire department connection and the check valve installed in the fire department connection piping.

10.1.4* Pipe Type and Class. The type and class of pipe for a particular underground installation shall be determined through consideration of the following factors:

(1) Fire resistance of the pipe

(2) Maximum system working pressure

(3) Depth at which the pipe is to be installed

(4) Soil conditions

(5) Corrosion

(6) Susceptibility of pipe to other external loads, including earth loads, installation beneath buildings, and traffic or vehicle loads

10.1.5* Working Pressure. Piping, fittings, and other system components

Table 10.1.1.3 Steel Piping for Fire Department Connections

Materials and Dimensions Standard Specificationfor Blackand ASTMA795 Specification for Black and ASTM A 795 Hot-DippedZincDipped Zinc-Coated (Galvanized)WeldedandSeamlessSteelPipeforFireProtectionUse Welded and Seamless Steel Pipe for Fire Protection Use SpecificationforPipe,Specification for Pipe, Steel, Black ANSI/ASTMA53ASTM A 53 andHotand Hot-Dipped, Zinc-Coated, Welded andSeamlessand Seamless Wrought Steel Pipe SpecificationforElectricSpecification for Electric-Resistance ANSI/ASMEB 3 6 ASME B 3 6 . 1 0 M - ASTMA - ASTM A 135 Welded Steel Pipe

10.1.1.3.1 External coating and wrapping as required by 10.1.1.3 shall be approved.

10.1.2 All piping used in private fire service mains shall be rated for the maximum system working pressure to which they arethe piping is exposed to but shall not be rated at less than 150 psi (10 bar).

Formatted: span5

Formatted: span5

Formatted: span5

Formatted: span5

Formatted: span5

Formatted: span5

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10.1.6* Lining of Buried Pipe.

10.1.6.1 Unless the requirements of 10.1.6.2 are met, all ferrous metal pipe shall be lined in accordance with the applicable standards in Table 10.1.1.

10.1.6.2 Steel pipe utilized in fire department connections and protected in accordance with the requirements of 10.1.3 shall not be required to be internally lined.

10.2 Fittings.

10.2.1* Buried Fittings. Fittings shall be of an approved type with joints and pressure class ratings compatible with the pipe used.

10.2.2 Standard Fittings.

10.2.2.1 Fittings shall meet the standards in Table 10.2.2.110.1.3 When lined piping is used, the manufacturer’s literature for internal diameter shall be used for all hydraulic calculations.

10.1.4 Where piping installed in a private fire service main must be installed above grade, the piping materials shall conform to NFPA 13 Standard for the Installation of Sprinkler Systems.

10.1.4.1 Underground piping shall be permitted to extend into the building through the slab or wall not more than 24 in. (0.6 m).

10.2 Fittings.

10.2.1 All fittings used in private fire service mains shall be in accordance with 10.2.3.10.2.1.1, 10.2.1.2 or 10.2.1.3

10.2.1.1 Fittings manufactured in accordance with Table 10.2.1.1 shall be permitted to be used.

Table 10.2.2.1 Fittings Materials and Dimensions


Cast Iron

Gray Iron Threaded Fittings, Classes 125 and 250 ASME B16.4

Gray Iron Pipe Flanges and Flanged Fittings, Classes 1225, 125, and 250

Ductile Iron

Ductile Iron and Gray Iron Fittings , 3 in. Through 48 in., for Water and other Liquids

AWWAC110AWWA C110

Ductile Iron Compact Fittings , 3 in. Through 24 in. and 54 in. through 64

AWWAC153AWWA C153

ASME B16.1

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in. for Water Service

Malleable Iron

Malleable Iron Threaded Fittings, Class 150 and 300 ASME B16.3

Steel

Factory-Made Wrought Steel Buttweld Fittings ASME B16.9

Buttwelding Ends ASME B16.25

Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and Elevated Temperatures

ASTM A 234

Pipe Flanges and Flanged Fittings, NPS ½ Through 24 ASME B16.5

Forged Steel Fittings, Socket Welded and Threaded ASME B16.11

Steel Pipe Flanges for Waterworks Service — Sizes 4 in. Through 144 in.

AWWA C207

Dimensions for Fabricated Steel Water Pipe Fittings AWWA C208

Copper

Wrought Copper and Bronze Solder Joint Pressure Fittings ASME B16.22

Cast Bronze Solder Joint Pressure Fittings ASME B16.18

Bronze Fittings

Cast Bronze Threaded Fittings ASTM B16.15

10.2.2.2 In addition to the standards in Table 10.2.2.2, CPVC fittings shall also be in accordance with 10.2.3 and with the portions of the ASTM standards specified in Table 10.2.2.2 that apply to fire protection service.

Table 10.2.2.2 Specially Listed Fittings Materials and Dimensions


Chlorinated Polyvinyl Chloride (CPVC) Specification for Schedule 80 CPVC Threaded Fittings

ASTM F 437

Specification for Schedule 40 CPVC Socket-Type Fittings ASTM F 438

Specification for Schedule 80 CPVC Socket-Type Fittings ASTM F 439

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10.2.3 Special Listed Fittings. Other types of fittings investigated for suitability in automatic sprinkler installations and listed for this service, including, but not limited to, polybutylene, CPVC, and steel differing from that provided in Table 10.2.2.1, shall be permitted when 10.2.1.2 Fittings specifically listed for use in private fire service mains shall be permitted to be used.

10.2.1.2.1 Where listed fittings are used, they shall be installed in accordance with their listing limitations, including installation instructions.

10.2.4 Pressure Limits. Listed1.2.2 Where listing limitations or installation instructions differ from the requirements of this standard, the listing limitations and installation instructions shall apply.

10.2.1.3 Approved fittings shall be permitted for the system pressures as specified in their listings, but notto be used.

10.2.2 All fittings used in private fire service mains shall be rated for the maximum system working pressure to which the fittings ares exposed to but shall not be rated at less than 150 psi (10 bar).

10.2.3 Where fittings installed in a private fire service main must be installed above grade, the fittings shall conform to NFPA 13 Standard for the Installation of Sprinkler Systems.

10.2.3.1 Fittings in accordance with 10.2.1 shall be permitted for the transition to the above ground piping or fittings.

10.3 JoiningConnection of Pipe and ,Fittings and Appurtenances.

10.3.1* Buried Joints. Joints shall be approved.

Connection of all fittings and appurtenances to piping shall be in accordance with 10.3.2 Threaded Pipe and Fittings. All threaded steel10.3.2 Connections of pipe and fittings shall haveindicated in Tables 10.1.1.1 and 10.2.1.1 shall be in accordance with the referenced standard in the Table.

10.3.3 Listed Connections. Connections utilizing listed products shall be in accordance with the listing limitations and the manufacturer’s installation instructions.

10.3.3.1 Where listing limitations or installation instructions differ from the requirements of this standard, the listing limitations and installation instructions shall apply.

10.3.4 Where pipe, fittings or appurtenances are connected using threads cut, all threads shall be in accordance with ANSI/ASME B1.20.1.

10.3.3* Groove Joining Methods. Pipes10.3.5 Grooved Connections. Where pipe, fittings or appurtenances are connected using grooves, they shall be connected in accordance with 10.3.5.1 through 10.3.5.3.

10.3.5.1 Pipe, fittings, and appurtenances to be joined with grooved couplings shall contain cut, rolled, or cast grooves that are dimensionally compatible with the couplings.

10.3.5.2 Pipe, fittings, and appurtenances that are connected with grooved couplings and are part of a listed assembly shall be permitted to be used.

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10.3.5.3 Pipe joined with grooved fittings shall be joined by a listed combination of fittings, gaskets, and grooves.

10.3.4 Brazed and Pressure Fitting Methods. Joints10.3.6All joints for the connection of copper tube shall be brazed or joined using pressure fittings as specified in Table 10.2.2.1.

10.3.5 Other Joining Methods. Other joining methods listed for this service shall be permitted where installed in accordance with their listing limitations.

10.4 Protection of Private Fire Service Mains

10.3.6 Pipe Joint Assembly.

10.3.64.1 Joints shall be assembled by persons familiar with the particular materials being used and in accordance with the manufacturer's instructions and specifications. Protection from Corrosion

10.3.6.2*4.1.1 Coatings. All bolted joint accessories shall be cleaned and thoroughly coated with asphalt or other corrosion-retarding material after installation.

10.4 Depth of Cover.

10.4.1* The depth of cover over water pipes shall be determined by the maximum depth of frost penetration in the locality where the pipe is laid.

10.4.2 The top of the pipe shall be buried not less than 1 ft (0.3 m) below the frost line for the locality.

10.4.3 In those locations where frost is not a factor, the depth of cover shall be not less than 2½ ft (0.8 m) to prevent mechanical damage.

10.4.4 Pipe under driveways shall be buried at a minimum depth of 3 ft (0.9 m).

10.4.5 Pipe under railroad tracks shall be buried at a minimum depth of 4 ft (1.2 m).

10.4.6 The depth of cover shall be measured from the top of the pipe to finished grade, and due consideration shall always be given to future or final grade and nature of soil.

10.5 Protection Against Freezing.

10.5.1* Where it is impracticable to bury pipe, pipe shall be permitted to be laid aboveground, provided that the pipe is protected against freezing and mechanical damage.

10.5.2 Pipe shall be buried below the frost line where entering streams and other bodies of water.

10.5.3 Where pipe is laid in water raceways or shallow streams, care shall be taken that there will be sufficient depth of running water between the pipe and the frost line during all seasons of frost; a safer method is to bury the pipe 1 ft (0.3 m) or more under the bed of the waterway.

10.5.4 Pipe shall be located at a distance from stream banks and embankment walls that prevents danger of freezing through the side of the bank.

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10.6 Protection Against Damage.

10.6.1 Pipe shall not be run under the building except where permitted in 10.6.2 and 10.6.3.

10.6.2 Where approved, pipe shall be permitted to be run under buildings, and special precautions shall be taken, including the following:

(1) Arching the foundation walls over the pipe

(2) Running pipe in covered trenches

(3) Providing valves to isolate sections of pipe under buildings

10.6.3 Fire service mains shall be permitted to enter the building adjacent to the foundation.

10.6.3.1* The.1.2The requirements of 10.6.2(2) and 10.6.2(3)10.4.1.1 shall not apply where fire service mains enter under the building no more than 10 ft (3 m) as measured from the outside edge of the building to the center of the vertical pipeto epoxy coated fittings, valves, glands or other accessories.

10.6.4.1.3* Pipe joints shall not be located under foundation footings.

10.6.5* Piping shall be run at least 1 ft (305 mm) below the bottom of foundations/footers.

10.6.5.1 The requirements of 10.6.6 shall not apply when piping is sleeved.

10.6.6 Mains shall be subjected to an evaluation of the following specific loading conditions and protected, if necessary:

(1) Mains running under railroads carrying heavy cargo

(2) Mains running under large piles of heavy commodities

(3) Mains located in areas that subject the main to heavy shock and vibrations

10.6.7* Where it is necessary to join metal pipe with pipe of dissimilar metal, the joint shall be insulated against the passage of an electric current using an approved method.

10.4.2 Protection of Piping.10.6.8*10.4.2.1 Protection from Freezing.* The depth of cover for private fire service mains and their appurtenances to protect against freezingshall be in accordance with 10.4.2.

10.4.2.1.1 The top of the pipe shall be buried not less than 1 ft (0.3 m) below the frost line for the locality.

10.4.2.1.2 The depth of piping shall be measured from the top of the piping to the final grade.

10.4.2.1.3 Where listed piping is used and the bury depth differs from this standard, the listing limitations shall apply.




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10.4.2. 1.4 Where private fire service mains are installed above ground, they shall be protected from freezing in accordance with NFPA 13 Standard for the Installation of Sprinkler Systems.

10.4.2.1.5 Private fire service mains installed in water raceways or shallow streams shall be installed so that the piping will remain in the running water throughout the year.

10.4.2.1.6 Where piping is installed adjacent to a vertical face, it shall be installed from the vertical face at the same distance as if the piping were buried.

10.4.2.1.7 Protection of private fire service mains from freezing using heat tracing shall be permitted when the heat tracing is specifically listed for underground use.

10.4.2.1.7.1 Heat tracing not listed for underground use shall be permitted when piping is installed in accordance with 10.4.2.5.

10.4.2.2 Protection From Mechanical Damage. The depth of cover for private fire service mains and their appurtenances to protect against mechanical damage shall be in accordance with 10.4.2.3.

10.4.2.1. The depth of piping shall be measured from the top of the piping to the final grade.

10.4.2.2 In locations where freezing is not a factor, the depth of cover shall not be less than 30 in. (0.8 m) below grade to prevent mechanical damage.

10.4.2.2.1 Where listed piping is used and the bury depth differs from this standard, the listing limitations shall apply.

10.4.2.3 Private fire service mains installed under driveways or roadways shall be buried at a minimum depth of 3 ft (0.9 m).

10.4.2.3.1 Sidewalks, walkways and other paved or concrete pedestrian passageways shall not be required to comply with 10.4.2.3.

10.4.2.4 Private fire service mains installed under railroad tracks shall be buried at a minimum depth of 4 ft (1.2 m).

10.4.2.4.1 Where railroad operators require a greater depth of bury, the greater depth shall apply.

10.4.2.5 Private fire service mains installed under large piles of heavy commodities or subject to heavy shock and vibrations shall be buried at a minimum depth of 4 ft (1.2 m).

10.4.2.6 Where private fire service mains are installed above ground, they shall be protected with bollards or other means as approved by the AHJ when subject to mechanical damage.

10.4.3 Private Fire Service Mains Under Buildings. Except as allowed by 10.4.3, private fire service mains shall not be allowed to run under buildings.


10.4.3.1* Private fire service mains supplying fire protection systems within the building shall be permitted to extend no more than 10 ft (3 m), as measured from the outside of the building, under the building to the riser location.

10.4.3.1.1* Pipe joints shall not be located directly under foundation fittings.

10.4.3.1.2* Piping shall be installed a minimum of 12 in. (305 mm) below the bottom of building foundations or footers.

10.4.3.1.2.1 The requirements of 10.4.3.1.2 shall not apply when the piping is sleeved with an approved material.

10.4.3.2 Where approved, private fire service mains supplying systems within the building shall be permitted to extend more than 10 ft (3 m) under the building when all the requirements of 10.4.3.2.1, through 10.4.3.2.4 are met.

A.10.4.3.2 The design concepts in 10.4.3.2.1 through 10.4.3.2.4 should apply to both new installations and existing private fire service mains approved to remain under new buildings.

10.4.3.2.1 Where the piping is installed under the building, all foundations or footers over the private fire service main shall be arched to create a minimum of 24 in (610 mm) clearance.

10.4.3.2.2 It shall be acceptable to install the piping in covered trenches where the trenches are accessible from within the building.

10.4.3.2.3 All joints shall be mechanically restrained.

10.4.3.2.4 A valve shall be installed before the piping enters under the building and within 24 in. (610 mm) of where the piping enters the building.


10.5 Grounding and Bonding

10.5.1* In no case shall the underground piping be used as a grounding electrode for electrical systems.

10.6.85.1.1* The requirement of 10.6.8 shall not preclude the bonding of the underground piping to the lightning protection grounding system as required by NFPA 780 in those cases where lightning protection is provided for the structure.

10.7 Requirement for Laying Pipe.

10.7.1 Pipes, valves, hydrants, gaskets, and fittings shall be inspected for damage when received and shall be inspected prior to installation. (See Figure 10.10.1.)

10.7.2 The torquing of bolted joints shall be checked.

10.7.3 Pipe, valves, hydrants, and fittings shall be clean inside.

10.7.4 When work is stopped, the open ends of pipe, valves, hydrants, and fittings shall be plugged to prevent stones and foreign materials from entering.

10.7.5 All pipe, fittings, valves, and hydrants shall be carefully lowered into the trench using appropriate equipment and carefully examined for cracks or other defects while suspended above the trench.

10.7.6 Plain ends shall be inspected for signs of damage prior to installation.

10.7.7 Under no circumstances shall water main materials be dropped or dumped.

10.7.8 Pipe shall not be rolled or skidded against other pipe materials.

10.7.9 Pipes shall bear throughout their full length and shall not be supported by the bell ends only or by blocks.

10.7.10 If the ground is soft or of a quicksand nature, special provisions shall be made for supporting pipe.

10.7.11 Valves and fittings used with nonmetallic pipe shall be supported and restrained in accordance with the manufacturer's specifications.

10.8 Joint * Restraint.

10.8.1 General.

10.8.1.1* All tees, plugs, caps, bends, reducers, valves, and hydrant branches shall be Private fire service mains shall be restrained against movement by using thrust blocks in accordance with 10.8.2 or restrained joint systems in accordance with 10.8.3.

10.8.1.2* Piping with fused, threaded, grooved, or welded joints shall not require additional restraining, provided that such joints can pass the hydrostatic test of 10.10.2.2 without shifting of piping or leakage in excess of permitted amounts.

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10.8.1.3 Steep Grades. On steep grades, mains shall be additionally restrained to prevent slipping.

10.8.1.3.1 Pipe shall be restrained at the bottom of a hill and at any turns (lateral or vertical).

10.8.1.3.2 The restraint specified in changes in direction in accordance with 10.6.1, 10.6.2 or 10.6.310.86.1.3.1* shall be to natural rock or to suitable piers built on the downhill side of the bell.

10.8.1.3.3 Bell ends shall be installed facing uphill.

10.8.1.3.4 Straight runs on hills shall be restrained as determined by the design engineer.

10.8.2* Thrust Blocks.

10.8.26.1 .1 Thrust blocks shall be considered satisfactory permitted where soil is suitable for their usestable and capable of resisting the anticipated thrust forces.

10.86.1.2.2 Thrust blocks shall be of a concrete, of a mix not leaner than one part cement, two and one-half parts sand, and five parts stone.

10.8.26.1.3 Thrust blocks shall be placed between undisturbed earth and the fitting to be restrained and shall be capable of resisting the calculated thrust forces.

10.8.2.4 6.14 Wherever possible, thrust blocks shall be placed solocatedso that the joints are accessible for repair.

10.8.36.2* Restrained Joint Systems. FirePrivate fireservicef service mains utilizing restrained joint systems shall include one or more of the following:

(1) Locking mechanical or push-on joints

(2) Mechanical joints utilizing setscrew retainer glands

(3) Bolted flange joints

(4) Heat-fused or welded joints

(5) Pipe clamps and tie rods

(6) Threaded or grooved joints

(7 (5) Other approved methods or devices

10.8.36.2.1 Sizing Clamps, Rods, Bolts, and Washers.

10.8.36.2.1.1 Clamps.

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10.8.36.2.1.1.1 Clamps shall have the following dimensions:

(1) ½ in. × 2 in. (12.7 mm × 50.8 mm) for 4 in. (102 mm) to 6 in. (152 mm) pipe

(2) 5⁄8 in. × 2½ in. (15.9 mm × 63.5 mm) for 8 in. (204 mm) to 10 in. (254 mm) pipe

(3) 5⁄8 in. × 3 in. (15.9 mm × 76.2 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.1.2 The diameter of a bolt hole shall be 1⁄168 in. (1.63.2 mm) larger than that of the corresponding bolt.

10.8.36.2.1.2 Rods.

10.8.36.2.1.2.1.2.1 Rods shall be not less than 5⁄8 in. (15.9 mm) in diameter.

10.8.36.2.1.2.2 Table 10.8.36.2.1.2.2 provides the numbers of various diameter rods that shall be used for a given pipe size.

Table 10.8.36.2.1.2.2 Rod Number — Diameter Combinations

Nominal Pipe Size

(in.)

5⁄8 in.

(15.9 mm) ¾ in.

(19.1 mm)

7⁄8 in.

(22.2 mm) 1 in.

(25.4 mm)

4 2 — — —

6 2 — — —

8 3 2 — —

10 4 3 2 —

12 6 4 3 2

14 8 5 4 3

16 10 7 5 4

Note: This table has been derived using pressure of 225 psi (15.5 bar) and design stress of 25,000 psi (172.4 MPa).

10.8.36.2.1.2.3 Where using bolting rods, the diameter of mechanical joint bolts shall limit the diameter of rods to ¾ in. (19.1 mm).

10.8.36.2.1.2.4 Threaded sections of rods shall not be formed or bent.

10.8.36.2.1.2.5 Where using clamps, rods shall be used in pairs for each clamp.

10.8.36.2.1.2.6 Assemblies in which a restraint is made by means of two clamps canted on the barrel of the pipe shall be permitted to use one rod per clamp if approved for the specific installation by the authority having jurisdiction.

10.8.3.16.2.1.2.7 Where using combinations of rods, the rods shall be symmetrically spaced.

10.8.36.2.1.3 Clamp Bolts. Clamp bolts shall have the following diameters:


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(1) 5⁄8 in. (15.9 mm) for pipe 4 in. (102 mm), 6 in. (152 mm), and 8 in. (204 mm)

(2) ¾ in. (19.1 mm) for 10 in. (254 mm) pipe

(3) 7⁄8 in. (22.2 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.4 Washers.

10.8.36.2.1.4.1 Washers shall be permitted to be cast iron or steel and round or square.

10.8.36.2.1.4.2 Cast iron washers shall have the following dimensions:

(1) 5⁄8 in. × 3 in. (15.9 mm × 76.2 mm) for 4 in. (102 mm), 6 in. (152 mm), 8 in. (204 mm), and 10 in. (254 mm) pipe

(2) ¾ in. × 3½ in. (19.1 mm × 88.9 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.4.3 Steel washers shall have the following dimensions:

(1) ½ in. × 3 in. (12.7 mm × 76.2 mm) for 4 in. (102 mm), 6 in. (152 mm), 8 in. (204 mm), and 10 in. (254 mm) pipe

(2) ½ in. × 3½ in. (12.7 mm × 88.9 mm) for 12 in. (305 mm) pipe

10.8.36.2.1.4.4 The diameter of holes shall be 1⁄8 in. (3.2 mm) larger than that of bolts or rods.

10.8.36.2.2 Sizes of Restraint Straps for Tees.

10.8.36.2.2.1 Restraint straps for tees shall have the following dimensions:

(1) 5⁄8 in. (15.9 mm) thick and 2½ in. (63.5 mm) wide for 4 in. (102 mm), 6 in. (152 mm), 8 in. (204 mm), and 10 in. (254 mm) pipe

(2) 5⁄8 in. (15.9 mm) thick and 3 in. (76.2 mm) wide for 12 in. (305 mm) pipe

10.8.36.2.2 .2 The diameter of rod holes shall be 1⁄16 in. (1.6 mm) larger than that of rods.

10.8.36.2.2.3 Figure 10.8.36.2.2.3 and Table 10.8.36.2.2.3 shall be used in sizing the restraint straps for both mechanical and push-on joint tee fittings.

****INSERT FIGURE HERE****

FIGURE 10.8.36.2.2.3 Restraint Straps for Tees.

Table 10.8.36.2.2.3 Restraint Straps for Tees

Nominal Pipe Size

(in.)

A B C D

in. mm in. mm in. mm in. mm



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4 12½ 318 101⁄8 257 2½ 64 1¾ 44

6 14½ 368 121⁄8 308 39⁄16 90 213⁄16 71

8 16¾ 425 143⁄8 365 421⁄32 118 329⁄32 99

10 191⁄16 484 1611⁄16 424 5¾ 146 5 127

12 225⁄16 567 193⁄16 487 6¾ 171 57⁄8 149

10.8.36.2.3 Sizes of Plug Strap for Bell End of Pipe.

10.8.36.2.3.1 The strap shall be ¾ in. (19.1 mm) thick and 2½ in. (63.5 mm) wide.

10.86.2.3.3.2 The strap length shall be the same as dimension A for tee straps as shown in Figure 10.8.36.2.2.3.

10.86.2.3.3.3 The distance between the centers of rod holes shall be the same as dimension B for tee straps as shown in Figure 10.8.36.2.2.3.

10.8.36.2.4 * Material. Clamps, rods, rod couplings or turnbuckles, bolts, washers, restraint straps, and plug straps shall be of a material that has physical and chemical characteristics that indicate its deterioration under stress can be predicted with reliability.

10.8.36.2.5* Corrosion Resistance. After installation, rods, nuts, bolts, washers, clamps, and other restraining devices shall be cleaned and thoroughly coated with a bituminous or other acceptable corrosion-retarding material.

10.6.2.5.1 The requirements of 10.6.2.5 shall not apply to epoxy coated fittings, valves, glands or other accessories.

10.6.3* Private fire service mains utilizing one or more of the following connection methods shall not require additional restraint , provided that such joints can pass the hydrostatic test of 10.10.2.2 without shifting of piping.

(1) Threaded Connections

(2) Grooved Connections

(3) Welded Connections

(4) Heat Fused Connections

(5) Chemical or Solvent Cemented Connections

10.7 Steep Grades.

10.7.1On1 steep grades, mains shall be additionally restrained to prevent slipping.

10.7.1.1 Pipe shall be restrained at the bottom of a hill and at any turns (lateral or vertical).


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10.7.1.1.1 The restraint specified in 10.7.1.1 shall be to natural rock or to suitable piers built on the downhill side of the bell.

10.7.1.2 Bell ends shall be installed facing uphill.

10.7.1.3 Straight runs on hills shall be restrained as determined by a design professional.

10.8 Installation Requirements.

10.8.1 Piping, valves, hydrants, gaskets, and fittings shall be inspected for damage when received and shall be inspected prior to installation.

10.8.2 The tightness of bolted joints shall be verified by the bolt torque or by the method described in the listing information or manufacturer’s installation instructions..

10.8.3 Pipe, valves, hydrants, and fittings shall be clean and free from internal debris.

10.8.4 When work is stopped, the open ends of piping, valves, hydrants, and fittings shall be plugged or covered to prevent foreign materials from entering.

10.8.5 All piping, fittings, valves, and hydrants shall be examined for cracks or other defects while suspended above the trench and lowered into the trench using appropriate equipment.

10.8.6 Plain ends shall be inspected for signs of damage prior to installation.

10.8.7 Piping, fittings, valves, hydrants and appurtenances shall not be dropped, dumped or rolled or skidded against other materials.

10.8.8 Pipes shall be supported in the trench throughout their full length and shall not be supported by the bell ends only or by blocks.

10.8.9 If the ground is soft, other means shall be provided to support the pipe.

10.8.10 Valves and fittings used with nonmetallic pipe shall be supported and restrained in accordance with the manufacturer's installation instructions.

10.9 Backfilling.

10.9.1 Backfill material shall be tamped in layers or puddled under and around pipes to prevent settlement or lateral movement and shall contain no ashes, cinders, refuse, organic matter, or other corrosive materials.

10.9.2 Backfill material shall not contain ash, cinders, refuse, organic matter or other corrosive materials.

10.9.3 Rocks shall not be placed in trenchesused for backfill.

10.9.3 4 Frozen earth shall not be used for backfillingas backfill material.

10.9.4 5 In trenches cut through rock, tamped backfill shall be used for at least 6 in. (150 mm) under and around the pipe and for at least 2 ft (0.6 m) above the pipe.










10.10 Testing10.9.6 Where using piping listed for private fire service mains, the manufacturer’s installation instructions for backfill shall be followed.

10.10Testing and Acceptance.

10.10.1 Approval of Underground Piping. The installing contractor shall be responsible for the following:

(1) Notifying the authority having jurisdiction and the owner's representative of the time and date testing is to be performed

(2) Performing all required acceptance tests

(3) Completing and signing the contractor's material and test certificate(s) shown in Figure 10.10.1


FIGURE 10.10.1 Sample of Contractor's Material and Test Certificate for Underground Piping.


FIGURE 10.10.1 Continued

10.10.2 Acceptance Requirements.

10.10.2.1* Flushing of Piping.

10.10.2.1.1 Underground piping, from the water supply to the system riser, and lead-in connections to the system riser, including all hydrants, shall be completely flushed before the connection is made to downstream fire protection system piping.

10.10.2.1.2 The flushing operation shall be continued for a sufficient timecontinue until water flow is verified to ensure thorough cleaning.be clear of debris. 10.10.2.1.3 The minimum rate of flow shall be not less than one of the following: (1) ) Hydraulically calculated water demand flow rate of the system, including any hose requirements (2)* (2)* Flow in accordance with Table 10.10.2.1.3Table 10.10.2.1.3

(3) ) Maximum flow rate available to the system under fire conditions

Table 10.10.2.1.3 Flow Required to Produce Velocity of 10 ft/sec (3 m/sec) in Pipes

Nominal Pipe Size Flow Rate

in. mm gpm L/min

2 51 100 379

2 ½ 63 150 568


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3 76 220 833

4 102 390 1,476

5 127 610 2,309

6 152 880 3,331

8 204 1,560 5,905

10 254 2,440 9,235

12 305 3,520 13,323

10.10.2.1.4 Provision shall be made for the proper disposal of water used for flushing or testing.

10.10.2.2 Hydrostatic Test.

10.10.2.2.1* All piping and attached appurtenances subjected to system working pressure shall be hydrostatically tested at 200 psipsig (13.8 bar) or 50 psi (3.5 bar) in excess of the system working pressure, whichever is greater, and shall maintain that pressure at ±5 psipsig (0.35 bar) for 2 hours.

10.10.2.2.2 Pressure loss Acceptable test results shall be determined by indication of either a drop in gauge pressure loss less than 5 psig or by no visual leakage.

10.10.2.2.3 The test pressure shall be read from one of the following, located at the lowest elevation of the system or the portion of the system being tested:

(1) A gauge located at one of the hydrant outlets

(2) A gauge located at the lowest point where no hydrants are provided

10.10.2.2.4* The trench shall be backfilled between joints before testing to prevent movement of pipe.

10.10.2.2.5 Where required for safety measures presented by the hazards of open trenches, the pipe and joints shall be permitted to be backfilled, provided the installing contractor takes the responsibility for locating and correcting leakage.

10.10.2.2.6* Hydrostatic Testing Allowance. Where additional water is added to the system to maintain the test pressures required by 10.10.2.2.1, the amount of water shall be measured and shall not exceed the limits of Table 10.10.2.2.6, which are based upon the following equations: U.S. Customary Units:

[10.10.2.2.6(a)]

where: L = testing allowance (makeup water) [gph (gal/hr)]


S = length of pipe tested (ft) D = nominal diameter of pipe (in.) P = average test pressure during hydrostatic test (gauge psi)

Metric Units:

[10.10.2.2.6(b)]

where: L = testing allowance (makeup water) (L/hr) S = length of pipe tested (m) D = nominal diameter of pipe (mm) P = average test pressure during hydrostatic test (kPa)

Table 10.10.2.2.6 Hydrostatic Testing Allowance at 200 psi (gph/100 ft of Pipe)

Nominal Pipe Diameter

(in.) Testing Allowance

2 0.019

4 0.038

6 0.057

8 0.076

10 0.096

12 0.115

14 0.134

16 0.153

18 0.172

20 0.191

24 0.229

Notes:

(1) For other length, diameters, and pressures, utilize Equation 10.10.2.2.6(a) or 10.10.2.2.6(b) to determine the appropriate testing allowance.

(2) For test sections that contain various sizes and sections of pipe, the testing allowance is the sum of the testing allowances for each size and section.

10.10.2.3 Other Means of Hydrostatic Tests. Where required by the authority having jurisdiction, hydrostatic tests shall be permitted to be completed in accordance with the requirements of AWWA C600, AWWA C602, AWWA C603, and AWWA C900.

10.10.2.4 Operating Test.


10.10.2.4.1 Each hydrant shall be fully opened and closed under system water pressure.

10.10.2.4.2 Dry barrel hydrants shall be checked for proper drainage.

10.10.2.4.3 All control valves shall be fully closed and opened under system water pressure to ensure proper operation.

10.10.2.4.4 Where fire pumps are availablesupply the private fire service main , the operating tests required by 10.10.2.4 shall be completed with the pumps running.

10.10.2.5 Backflow Prevention Assemblies.

10.10.2.5.1 The backflow prevention assembly shall be forward flow tested to ensure proper operation.

10.10.2.5.2 The minimum flow rate tested in 10.10.2.5.1 shall be the system demand, including hose stream demand where applicable.


Formatted: div6


6.3.6 Brass Pipe,

6.3.7 Stainless Steel

6.3.8 Metallic Pipe and Tube bending

6.3.9 Non-Metallic Pipe

6.3.10 Listed Pipe and Tubing

6.3.11 Pipe and Tubing Identification




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Submittal Date: Tue Aug 20 12:05:18 EDT 2013

Committee Statement

CommitteeStatement:

Section 6.3.6 through 6.3.11 should be renumbered as proposed. The technical changes made tothese sections via other First Revisions should be incorporated into the First Draft. This is strictlya restructuring of 6.3.6 for clarity.

ResponseMessage:




16 of 474 11/7/2013 12:33 PM


Replace the word "small room" with "small compartment" in the following sections:

8.15.1.2.9

11.2.3.1.4(4)(g)

12.9.2(7)

23.4.4.6.2

Table 23.4.4.6.2

A.23.4.4.6.2




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Submittal Date: Wed Aug 21 15:12:03 EDT 2013

Committee Statement

CommitteeStatement:

There was confusion regarding the use of the terms small room and small compartment. ThisGlobal revision, in conjunction with FR-95 replaces the incorrect usage of the term small room byreplacing it with small compartment.

ResponseMessage:


17 of 474 11/7/2013 12:33 PM

First Revision No. 72-NFPA 13-2013 [ Section No. 1.2.2 ]

1.2.2

Sprinkler systems and private fire service mains are specialized fire protection systems and shall requiredesign and installation by knowledgeable and experienced design and installation personnel .




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Committee Statement

Committee Statement: The revisions were made to make the section grammatically correct.

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18 of 474 11/7/2013 12:33 PM


2.3.2 ASCE Publications.

American Society of Civil Engineers, 1801 Alexander Bell Drive, Reston, VA 20191-4400.

SEI/ASCE 7, Minimum Design Loads of Buildings and Other Structures,2005 2010 .




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Committee Statement

Committee Statement: Updated to reference the current edition of ASCE 7(2010).

Response Message:



19 of 474 11/7/2013 12:33 PM


2.3.4 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

ANSI/ASTM A 53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless, 2001.

ASTM A 106, Standard Specification for Seamless Carbon Steel Pipe for High Temperature Service, 2008.

ASTM A 135, Standard Specification for Electric-Resistance-Welded Steel Pipe, 2001.

ASTM A 153A/153M, Standard Specification for Zinc Coating (Hot Dip) on Iron and Steel Hardware, 2004.

ASTM A 234, Standard Specification for Piping Fittings of Wrought-Carbon Steel and Alloy Steel for Moderateand High Temperature Service, 2001.

ASTM A 795, Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded andSeamless Steel Pipe for Fire Protection Use, 2000.

ASTM B 16.15, Cast Bronze Threaded Fittings, 1985.

ASTM B 32, Standard Specification for Solder Metal, 2000.

ASTM B 43, Specification for Seamless Red Brass Pipe, 2009.

ASTM B 75, Standard Specification for Seamless Copper Tube, 1999.

ASTM B 88, Standard Specification for Seamless Copper Water Tube, 1999.

ASTM B 251, Standard Specification for General Requirements for Wrought Seamless Copper andCopper-Alloy Tube, 1997.

ASTM B 446, Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNSN 06625) andNickel-Chromium-Molybdenum-Silicon Alloy (UNSN 06219) Rod and Bar, 2000.

ASTM B 813, Standard Specification for Liquid and Paste Fluxes for Soldering Applications of Copper andCopper-Alloy Tube, 2000.

ASTM B 828, Standard Practice for Making Capillary Joints by Soldering of Copper and Copper Alloy Tubeand Fittings, 2000.

ASTM C 635, Standard Specification for the Manufacture, Performance, and Testing of Metal SuspensionSystems for Acoustical Tile and Lay-In Panel Ceilings, 2004 2012 .

ASTM C 636, Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile andLay-In Panels, 2004 2008 .

ASTM E 84, Standard Test Method for Surface Burning Characteristics of Building Materials, 2010.

ASTM E 119, Standard Test Methods for Fire Tests of Building Construction and Materials, 2010.

ASTM E 136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C, 1999.

ASTM F 437, Standard Specification for Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic PipeFittings, Schedule 80, 1999.

ASTM F 438, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic PipeFittings, Schedule 40, 2001.

ASTM F 439, Standard Specification for Socket-Type Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic PipeFittings, Schedule 80, 2001.

ASTM F 442, Standard Specification for Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe (SDR-PR),2009.

ASTM F 1121, Standard Specification for International Shore Connections for Marine Fire Applications, 1998.

ASTM SI 10, Standard for Use of the International System of Units (SI): The Modern Metric System, 1997.


National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/FormLaunch?id=/TerraView/C...

1 of 2 11/7/2013 12:43 PM



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Committee Statement and Meeting Notes

Committee Statement: Updated to reference the current edition of ASTM C635 (2012) and ASTM C636 (2008).

Response Message:



2 of 2 11/7/2013 12:43 PM

First Revision No. 76-NFPA 13-2013 [ New Section after 3.3.6 ]

3.3.7 Concealed Space.

That portion (s) of a building behind walls, over suspended ceilings, in pipe chases and attics, andwhose size might normally range from 1 in. (44.45 mm) stud spaces to 8 ft (2.44 m) interstitial trussspaces and that might contain combustible materials such as building structural members, thermaland/or electrical insulation, and ducting.




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Committee Statement

CommitteeStatement:

This term is used extensively throughout the document. Many AHJ's do not consider an attic aconcealed space because there may be scuttle holes which allow access. The document needs todefine the term. This definition comes from NFPA 96.

ResponseMessage:

Public Input No. 136-NFPA 13-2013 [New Section after 3.3.6]


23 of 474 11/7/2013 12:33 PM


3.3.8* Control Valve.

A valve controlling flow to water-based fire protection systems and devices .




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Committee Statement

Committee Statement: This definition was revised to correlate with the changes made to NFPA 24.

Response Message:


24 of 474 11/7/2013 12:33 PM


3.3.23* Sprinkler System.

A system that consists of an integrated network of piping designed in accordance with fire protectionengineering standards that includes a water supply source, a water control valve, a waterflow alarm, and adrain and is commonly activated by heat from a fire, discharging water over the fire area . The portion ofthe sprinkler system above ground is a network of specifically sized or hydraulically designed pipinginstalled in a building, structure, or area, generally overhead, and to which sprinklers are attached in asystematic pattern. The system is commonly activated by heat from a fire and discharges water over thefire area.




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Committee Statement

CommitteeStatement:

The deleted text is redundant to the last sentence in the definition. There is no technicalchange to this section, simply an editorial clean up.

ResponseMessage:



25 of 474 11/7/2013 12:33 PM

First Revision No. 79-NFPA 13-2013 [ Section No. 3.4.1.1 ]

3.4.1.1 Premixed Antifreeze Solution.

A mixture of an antifreeze material with water that is prepared and factory-mixed by the manufacturer witha quality control procedure in place that ensures that the antifreeze solution remains homogeneous andthat the concentration is as specified.




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Committee Statement

CommitteeStatement:

The term "at a factory" was removed since NFPA 25 2014 did not include this phrase since it isredundant with the term "factory mixed" which is already included in the definition.

ResponseMessage:



26 of 474 11/7/2013 12:33 PM


3.5.6 Extension Fitting.

A male by female adapter intended to be used with a sprinkler to adjust the final fit where the sprinkler isinstalled in a finished ceiling or wall.




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Submittal Date: Thu Sep 05 17:41:21 EDT 2013

Committee Statement

CommitteeStatement:

The use of sprinkler extension (cheater) nipples has become commonplace without regard forfriction loss or concern for the number of nipples used. During inspections and re-model work, Ihave witnessed as many as five extension nipples stacked at a single sprinkler. Installers should bere-cutting the drop nipple rather than stacking these un-listed sprinkler head extenders.

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27 of 474 11/7/2013 12:33 PM


3.5.9 Riser Nipple.

Vertical piece of A vertical pipe between the cross main and branch line.




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Committee Statement

CommitteeStatement:

Change language to maintain consistency with related definitions 3.5.5 Cross Mains and theuse of pipe or pipes rather than "piece of pipe."

ResponseMessage:



28 of 474 11/7/2013 12:33 PM

First Revision No. 81-NFPA 13-2013 [ New Section after 3.6.4.1 ]

3.6.4.1* Control Mode Density/Area (CMDA) Sprinkler.

A type of spray sprinkler intended to provide fire control in storage applications using the designdensity/area criteria described in this standard.



A3.6.4.1_FR81.1380549737714.docx edited version




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Committee Statement

CommitteeStatement:

A new definition and Annex material is necessary but needs to clarify that a listing is not required forall CMDA sprinklers for storage applications. These are just spray sprinklers used in storageoccupancy. They may or may not be listed specifically for storage however could be used in otherhazard classifications. Not all sprinklers used in the storage chapters have to be specially listed forstorage. The words “large water droplets” also adds confusion as a standard spray sprinkler is notconsidered “large drop” sprinklers. To include the words “large water droplets” additional technicaldata would need to be submitted.

ResponseMessage:

Public Input No. 457-NFPA 13-2013 [New Section after 3.6.4.1]


29 of 474 11/7/2013 12:33 PM

A.3.6.4.1

This definition is focused on the storage application since the term CMDA is used in the storage chapters. As indicated in Chapter 12, spray sprinklers intended for storage applications requiring a design density greater than 0.34 gpm/ft should have a nominal K-factor of 11.2 or larger and be listed for storage applications. Spray sprinklers having a nominal K-factor of 5.6 or 8.0 are permitted to be used for storage applications as a CMDA sprinkler within certain design densities as described in Chapter 12.

Spray type sprinklers intended for use in accordance with the occupancy hazard density/area curves could also be considered CMDA sprinklers. However, the CMDA terminology is generally not referenced in the non-storage chapters, and this term is not used to describe these sprinklers in the product listings.



3.7.2* Unobstructed Construction.

Construction where beams, trusses, or other members do not impede heat flow or water distribution in amanner that materially affects the ability of sprinklers to control or suppress a fire. Unobstructedconstruction has horizontal structural members that are not solid, where the openings are at least 70percent of the cross-section area and the depth of the member does not exceed the least dimension of theopenings, or all construction types, with the exception of panel construction, where the spacing ofstructural members exceeds 71⁄2 ft (2.3 m) on center.




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Committee Statement

CommitteeStatement:

A.3.7.1 (4) Panel Construction states "Beams spaced more than 7 1/2 ft (2.3 m) apart and framedinto girders qualify as panel construction, provided the 300 ft^2 (27.9 m^2) area limitation is met".Panel construction is considered an obstructed construction, therefore, paragraph A.3.7.1 (4)conflicts with paragraph 3.7.2 which states "...ALL CONSTRUCTION TYPES where the spacing ofstructural members exceeds 7 1/2 ft (2.3 m) on center". These two sections would no longer conflictwhen the words "except panel construction" are added as they appear in this first revision.

ResponseMessage:



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3.9.1.1* Available Height for Storage.

The maximum height at which commodities can be stored above the floor and still maintain necessaryclearance from structural members and the required clearance below sprinklers.




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Committee Statement

CommitteeStatement:

This term is not used in the body of the text and chapter 3 definitions should not be provided for justannex material. The associated annex material is redundant and is more appropriately located anddiscussed in A.4.3. Since this is guidance for design professionals to consider future flexibility, it isreasonable to assume that they know it is possible for future use to be higher than possible initialuse and that the minimum clearance below sprinklers must be maintained, so no value is providedby this definition.

ResponseMessage:


Public Input No. 73-NFPA 13-2013 [Section No. A.3.9.1.1]


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3.9.1.17 Low-Piled Storage.

Solid-piled, palletized, rack storage, bin box, and shelf storage up to 12 ft (3.7 m) in height.



Organization: NFPA

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Submittal Date: Mon Sep 30 11:12:35 EDT 2013

Committee Statement

CommitteeStatement:

This is just editorial to better reflect that chapter 13 is not just miscellaneous storage and to follow aformat more consistent with the rest of the storage chapters. The definition of low-piled storage doesnot address the height difference between Class I- IV and Group A plastic as is the current case forHigh-piled storage. Deleted the forward reference to chapters 14, 15, 16, and 17 since thosesections direct users back to chap 13. Deleted portions of 13.2.2 since it provides no deviation fromwhat’s allowed to be protected by the chapter in the current 13.2.1 so serves no purpose.

ResponseMessage:


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3.9.3.2 Automotive Components on Portable Racks.

Automotive components on portable racks are defined as the following: instrument Instrument panels,windshields, metal and plastic gasoline tanks, heater housings, door panels, interior trim, bumper facia,wiring harnesses, sheet metal, body components, engines, driveline components, steering mechanisms,auxiliary motors, and lighting — all with or without expanded Group A plastic donnage dunnage . Thisdefinition does not include the storage of air bags, tires, and seats on portable racks.




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Committee Statement

CommitteeStatement:

This proposal is offered to correct a typographical error in 3.9.3.2, and for clarity. As per 5.6.4.4, itis only Group A plastics that are subdivided into expanded or nonexpanded categories, but aswritten, the text of 3.9.3.2, 20.2 and A.20.2 appears to be referring to all plastic classes.

ResponseMessage:



33 of 474 11/7/2013 12:33 PM

First Revision No. 187-NFPA 13-2013 [ Section No. 3.9.3.7.9 ]

3.9.3.7.9 Solid Shelf Rack.

A rack that is not defined as an open rack where shelves are fixed in place with a solid, slatted, or wiremesh barrier used as the shelf material and having limited openings in the shelf area.




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Committee Statement

CommitteeStatement:

This term is used in the standard to differentiate an open rack arrangment from a solid shelf rackarrangment, therefore the definition is needed. The definition of a solid shelf rack was clarified tomake the distinction between the two different rack configurations.

ResponseMessage:



34 of 474 11/7/2013 12:33 PM


3.9.3.8* Solid Shelving.

Global FR-239 Hide Deleted

Shelving that is fixed in place, slatted, wire mesh, or other type of shelves located within racks. The areaof a solid shelf is defined by perimeter aisle or flue space on all four sides or by the placement of loadsthat block openings that would otherwise serve as the required flue spaces . Solid shelves having an area

equal to or less than 20 ft 2 (1.9 m 2 ) are defined as open racks. Shelves of wire mesh, slats, or othermaterials more than 50 percent open and where the flue spaces are maintained are defined as openracks.




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Committee Statement

CommitteeStatement:

This revision is primarily editorial. It is intended to help clarify that the solid obstruction can also bethe load as currently portrayed only in the rack shelf area definition. One could contend that it’simplied by the wire mesh as a type of shelf but being explicit is warranted. It could also be arguedthat the definition on rack shelf area (3.9.3.7.6) addresses it but this phrase is not used anywhere inthe standard other than the definition. Text was copied from 3.9.3.7.6.

ResponseMessage:



35 of 474 11/7/2013 12:33 PM

First Revision No. 274-NFPA 13-2013 [ Section No. 5.6 ]

5.6* Commodity Classification.

See Section C.2.

5.6.1 General.

5.6.1.1* Classification of Commodities.

5.6.1.1.1

Commodity classification and the corresponding protection requirements shall be determined based onthe makeup of individual storage units (i.e., unit load, pallet load).

5.6.1.1.1.1

The type and amount of materials used as part of the product and its primary packaging as well as thestorage pallet shall be considered in the classification of the commodity.

5.6.1.1.2

When specific test data of commodity classification by a nationally recognized testing agency areavailable, the data shall be permitted to be used in determining classification of commodities.

5.6.1.2 Mixed Commodities.

5.6.1.2.1

Protection requirements shall not be based on the overall commodity mix in a fire area.

5.6.1.2.2

Unless the requirements of 5.6.1.2.3 or 5.6.1.2.4 are met, mixed commodity storage shall be protected bythe requirements for the highest classified commodity and storage arrangement.

5.6.1.2.3

The protection requirements for the lower commodity class shall be permitted to be utilized where all ofthe following are met:

(1) Up to 10 pallet loads of a higher hazard commodity, as described in 5.6.3 and 5.6.4, shall be

permitted to be present in an area not exceeding 40,000 ft2 (3716 m2).

(2) The higher hazard commodity shall be randomly dispersed with no adjacent loads in any direction(including diagonally).

(3) Where the ceiling protection is based on Class I or Class II commodities, the allowable number ofpallet loads for Class IV or Group A plastics shall be reduced to five.

5.6.1.2.4 Mixed Commodity Segregation.

The protection requirements for the lower commodity class shall be permitted to be utilized in the area oflower commodity class, where the higher hazard material is confined to a designated area and the area isprotected to the higher hazard in accordance with the requirements of this standard.

5.6.2 Pallet Types.

5.6.2.1 General.

When loads are palletized, the use of wood or metal pallets, or listed pallets equivalent to wood, shall beassumed in the classification of commodities.

5.6.2.2* Unreinforced Plastic Pallets.

For Class I through Class IV commodities, when unreinforced polypropylene or unreinforced high-densitypolyethylene plastic pallets are used, the classification of the commodity unit shall be increased one class.

5.6.2.2.1

Unreinforced polypropylene or unreinforced high-density polyethylene plastic pallets shall be marked witha permanent symbol to indicate that the pallet is unreinforced.

5.6.2.3*

For Class I through Class IV commodities, when reinforced polypropylene or reinforced high-densitypolyethylene plastic pallets are used, the classification of the commodity unit shall be increased twoclasses except for Class IV commodity, which shall be increased to a cartoned unexpanded Group Aplastic commodity.


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5.6.2.3.1

Pallets shall be assumed to be reinforced if no permanent marking or manufacturer's certification ofnonreinforcement is provided.

5.6.2.4

No increase in the commodity classification shall be required for Group A plastic commodities stored onplastic pallets.

5.6.2.5

For ceiling-only sprinkler protection, the requirements of 5.6.2.2 and 5.6.2.3 shall not apply where plasticpallets are used and where the sprinkler system uses spray sprinklers with a minimum K-factor of K-16.8(240).

5.6.2.6

The requirements of 5.6.2.2 through 5.6.2.7 shall not apply to nonwood pallets that have demonstrated afire hazard that is equal to or less than wood pallets and are listed as such.

5.6.2.7

For Class I through Class IV commodities stored on plastic pallets when other than wood, metal, orpolypropylene or high-density polyethylene plastic pallets are used, the classification of the commodityunit shall be determined by specific testing conducted by a national testing laboratory or shall beincreased two classes.

5.6.3* Commodity Classes.

5.6.3.1* Class I.

A Class I commodity shall be defined as a noncombustible product that meets one of the following criteria:

(1) Placed directly on wood pallets

(2) Placed in single-layer corrugated cartons, with or without single-thickness cardboard dividers, with orwithout pallets

(3) Shrink-wrapped or paper-wrapped as a unit load with or without pallets

5.6.3.2* Class II.

A Class II commodity shall be defined as a noncombustible product that is in slatted wooden crates, solidwood boxes, multiple-layered corrugated cartons, or equivalent combustible packaging material, with orwithout pallets.

5.6.3.3* Class III.

5.6.3.3.1

A Class III commodity shall be defined as a product fashioned from wood, paper, natural fibers, or GroupC plastics with or without cartons, boxes, or crates and with or without pallets.

5.6.3.3.2

A Class III commodity shall be permitted to contain a limited amount (5 percent by weight or volume orless) of Group A or Group B plastics.

5.6.3.4* Class IV.


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5.6.3.4.1

A Class IV commodity shall be defined as a product, with or without pallets, that meets one of thefollowing criteria:

(1) Constructed partially or totally of Group B plastics

(2) Consists of free-flowing Group A plastic materials

(3) Contains within itself or its packaging an appreciable amount (5 percent to 15 percent by weight or 5percent to 25 percent by volume) of Group A plastics of Group A plastics as indicated in Figure5.6.3.4.1

Figure 5.6.3.4.1 Classification of Commodities Containing Group A or B Plastics.

5.6.3.4.2

The remaining materials shall be permitted to be metal, wood, paper, natural or synthetic fibers, or GroupB or Group C plastics.

5.6.4* Classification of Plastics, Elastomers, and Rubber.

Plastics, elastomers, and rubber shall be classified as Group A, Group B, or Group C.


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5.6.4.1* Group A.

The following materials shall be classified as Group A:

(1) ABS (acrylonitrile-butadiene-styrene copolymer)

(2) Acetal (polyformaldehyde)

(3) Acrylic (polymethyl methacrylate)

(4) Butyl rubber

(5) EPDM (ethylene-propylene rubber)

(6) FRP (fiberglass-reinforced polyester)

(7) Natural rubber (if expanded)

(8) Nitrile-rubber (acrylonitrile-butadiene-rubber)

(9) PET (thermoplastic polyester)

(10) Polybutadiene

(11) Polycarbonate

(12) Polyester elastomer

(13) Polyethylene

(14) Polypropylene

(15) Polystyrene

(16) Polyurethane

(17) PVC (polyvinyl chloride — highly plasticized, with plasticizer content greater than 20 percent) (rarelyfound)

(18) SAN (styrene acrylonitrile)

(19) SBR (styrene-butadiene rubber)

5.6.4.2 Group B.

The following materials shall be classified as Group B:

(1) Cellulosics (cellulose acetate, cellulose acetate butyrate, ethyl cellulose)

(2) Chloroprene rubber

(3) Fluoroplastics (ECTFE — ethylene-chlorotrifluoro-ethylene copolymer; ETFE — ethylene-tetrafluoroethylene-copolymer; FEP — fluorinated ethylene-propylene copolymer)

(4) Natural rubber (not expanded)

(5) Nylon (nylon 6, nylon 6/6)

(6) Silicone rubber

5.6.4.3 Group C.

The following materials shall be classified as Group C:

(1) Fluoroplastics (PCTFE — polychlorotrifluoroethylene; PTFE — polytetrafluoroethylene)

(2) Melamine (melamine formaldehyde)

(3) Phenolic

(4) PVC (polyvinyl chloride — flexible — PVCs with plasticizer content up to 20 percent)

(5) PVDC (polyvinylidene chloride)

(6) PVDF (polyvinylidene fluoride)

(7) PVF (polyvinyl fluoride)

(8) Urea (urea formaldehyde)

5.6.4.4


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Cartoned Group A plastics shall be further subdivided as either expanded or nonexpanded unexpanded .

5.6.4.4.1

If a cartoned the commodity is more than 40 percent (by volume) cartoned expanded plastic, it shall beprotected as a cartoned expanded Group A plastic.

5.6.4.4.2

Exposed commodities containing greater than 25 percent by volume expanded plastic shall be protectedas an exposed expanded plastic.

5.6.5* Classification of Rolled Paper Storage.

For the purposes of this standard, the classifications of paper described in 5.6.5.1 through 5.6.5.4 shallapply and shall be used to determine the sprinkler system design criteria.

5.6.5.1 Heavyweight Class.

Heavyweight class shall be defined so as to include paperboard and paper stock having a basis weight

[weight per 1000 ft2 (92.9 m2)] of 20 lb (9.1 kg).

5.6.5.2 Mediumweight Class.

Mediumweight class shall be defined so as to include all the broad range of papers having a basis weight

[weight per 1000 ft2 (92.9 m2)] of 10 lb to 20 lb (4.5 kg to 9.1 kg).

5.6.5.3 Lightweight Class.

Lightweight class shall be defined so as to include all papers having a basis weight [weight per 1000 ft2

(92.9 m2)] of 10 lb (4.5 kg).

5.6.5.4 Tissue.

5.6.5.4.1

Tissue shall be defined so as to include the broad range of papers of characteristic gauzy texture, which,in some cases, are fairly transparent.

5.6.5.4.2

For the purposes of this standard, tissue shall be defined as the soft, absorbent type, regardless of basisweight — specifically, crepe wadding and the sanitary class including facial tissue, paper napkins,bathroom tissue, and toweling.

Chapter 6 was revised by a tentative interim amendment (TIA). See page 1.



FIGURE_5.6.3.4.1.docx Group A Plastics Figure for Ch5




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Committee Statement

CommitteeStatement:

Section 5.6 has been revised by replacing the 5-to-15 percent by weight and 5-to-25 percent byvolume requirement for group a plastics by utilizing a a new figure 5.6.3.4.1 to determine theappropriate commodity classification for mixed commodities. This table looks at both the percentageweight and percentage volume and includes Class III, Class IV and Group A options depending onthe percentage of the plastic versus other materials. Section 5.6.4.4 was revised to address cartonedplastics only. Section 5.6.4.4.2 was relocated into the notes associated with the new table as i no


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longer fit in the "cartoned" plastic section since it was dealing with exposed material.

ResponseMessage:

Public Input No. 283-NFPA 13-2013 [Sections 5.6.4.4.1, 5.6.4.4.2]

Public Input No. 413-NFPA 13-2013 [Section No. A.5.6.3]

Public Input No. 414-NFPA 13-2013 [New Section after 5.6.4.4.2]

Public Input No. 494-NFPA 13-2013 [Section No. 5.6]



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FIGURE 5.6.3.4.1 Classification of Commodities Containing Group A or B plastics


6.1.1.4

Materials meeting the requirements of 9.1.1.2, 9.1.1.5.2, and 9.1.1.5.3, and 9.1.1.6.4 shall not berequired to be listed.




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Committee Statement

CommitteeStatement:

1) Section 9.1.1.5.2 is editorially clarified to indicate the rod material is mild steel. 2) A new Section9.1.1.5.3 is being proposed since hanger rods were not specifically mentioned as a device that doesnot require Listing. 3) A new Section 9.1.1.6.3 was added since there are no requirements in thestandard for the hanger rod. The hanger rod is a critical component in maintaining the integrity of thesprinkler system and minimum requirements for the rod need to be specified. The hanger rod isassumed by designers and contractors to have characteristics that will provide the anticipatedperformance after installation. The addition of the requirements in this section should provide theguidance for the anticipated performance. 4) Section 6.1.1.4 needs to be revised to reference thenew 9.1.1.6.3.

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6.1.1.6

The new materials or devices listing instructions shall identify and specify the existing systemcomponents, including the fluids conveyed, with which the new listed materials, devices, or componentsare compatible. Materials and components shall be installed in accordance with material compatibilityinformation that is available as a part of a listing or manufacturer's published information.

6.1.1.6.1

This listing requirement shall also apply to chemical or material modifications made to componentslisted in Table 6.3.1.1 and Table 6.4.1 .




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CommitteeStatement:

The requirement as written is confusing since it does not indicate what constitutes a new material ordevices. In addition, many of the products included in the referenced tables are not listed. It alsoplaces a burden on the manufacturer to continually monitor new materials and devices that could beused in a system, which is an impractical requirement. Test methods to determine materialcompatibility for certain products are being developed as part of a project to develop a new ANSIstandard for this application. Therefore, using the compatibility information that is available at thetime of system design is more meaningful.

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6.2.1.1*


When a sprinkler has been removed for any reason is removed from a fitting or welded outlet , it shall notbe reinstalled except as permitted by 6.2.1.1.1 .

6.2.1.1.1*


Dry sprinklers shall be permitted to be reinstalled where they are not removed by applying torque at thepoint where the sprinkler is attached to the barrel.




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CommitteeStatement:

The concern of mechanical damage associated with removing sprinklers is applying torque on thesprinkler itself. Sprinklers that are removed by applying torque on a fitting can be reused. Specialrequirements addressing dry sprinklers have been added.

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6.2.9.3

The sprinklers shall be kept in a cabinet located where the temperature to which they are subjected will atno time exceed 100°F (38°C) the maximum ceiling temperatures specified in Table 6.2.5.1 for each of thesprinklers within the cabinet .




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CommitteeStatement:

Facilities that only include intermediate or high temperature sprinklers (or higher), including thosemaintained within the spare head box need not have a space conditioned to maintain temperaturesat 100F or less. A reference back to Table 6.2.5.1 will allow such an arrangment.

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First Revision No. 54-NFPA 13-2013 [ Section No. 6.3.1.1 [Excluding any Sub-Sections] ]

Pipe or tube shall meet or exceed one of the standards in Table 6.3.1.1 or be in accordance with 6.3.7.8.

Table 6.3.1.1 Pipe or Tube Materials and Dimensions


Ferrous Piping (Welded and Seamless)

Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded andSeamless Steel Pipe for Fire Protection Use

ASTM A 795

Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded andSeamless

ANSI/ASTM A 53

Wrought Steel PipeANSI/ASMEB36.10M

Specification for Electric-Resistance-Welded Steel Pipe ASTM A 135

Copper Tube (Drawn, Seamless)

Specification for Seamless Copper Tube ASTM B 75

Specification for Seamless Copper Water Tube ASTM B 88

Specification for General Requirements for Wrought Seamless Copper andCopper-Alloy Tube

ASTM B 251

Specification for Liquid and Paste Fluxes for Soldering Applications of Copper andCopper-Alloy Tube

ASTM B 813

Brazing Filler Metal (Classification BCuP-3 or BCuP-4) AWS A5.8

Solder Metal, Section 1: Solder Alloys Containing Less Than 0.2% Lead and HavingSolidus Temperatures Greater than 400°F

ASTM B 32

Alloy Materials ASTM B 446

CPVC

Nonmetallic Piping Specification for Special Listed Chlorinated Polyvinyl chloride(CPVC) Pipe

ASTM F 442

Brass Pipe

Specification for Seamless Red Brass Pipe ASTM B 43

Stainless Steel

Specification for Seamless, Welded, and Heavily Cold Worked Austenitic StainlessSteel Pipes

ASTMA312/312M




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Committee Statement: Added stainless steel as a common used material.

Response Message:


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Public Input No. 455-NFPA 13-2013 [Section No. 6.3.1.1 [Excluding any Sub-Sections]]


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6.3.1.6

Stainless steel pipe shall be in accordance with 6.3.7 .




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Committee Statement: Adding stainless steel as a common pipe material.

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6.3.1.5

Brass pipe shall be in accordance with 6.3.6.




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Committee Statement: This section has been revised to provide the correct reference.

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6.3.7* Nonmetallic Pipe.

Nonmetallic pipe in accordance with Table 6.3.1.1 shall be investigated for suitability in automaticsprinkler installations and listed for this service.

6.3.7.1

Listed nonmetallic pipe shall be installed in accordance with its listing limitations, including installationinstructions.

6.3.7.1.1

Manufacturer's installation instructions shall include its listing limitations.

6.3.7.2


When nonmetallic pipe is used in combination systems utilizing steel piping internally coated withcorrosion inhibitors and nonmetallic piping , the steel pipe coating shall be investigated listed forcompatibility with the nonmetallic piping by a testing laboratory pipe materials .

6.3.7.3


When nonmetallic pipe is used in combination systems utilizing steel pipe that is not internally coatedwith chemical corrosion inhibitors, no additional evaluations shall be required.

6.3.7.4*


When nonmetallic pipe is used in combination systems utilizing steel pipe, cutting oils and lubricantsused for fabrication of the steel piping shall be compatible with the nonmetallic pipe materials inaccordance with 6.1.1.6 .

6.3.7.5

Fire-stopping materials intended for use on nonmetallic piping penetrations shall be investigated forcompatibility compatible with the nonmetallic pipe materials in accordance with 6.1.1.6 .

6.3.7.6

Nonmetallic pipe listed for light hazard occupancies shall be permitted to be installed in ordinary hazard

rooms of otherwise light hazard occupancies where the room does not exceed 400 ft2 (37 m2).

6.3.7.7

Nonmetallic pipe shall not be listed for portions of an occupancy classification.

6.3.7.8* Listed Pipe and Tubing.

6.3.7.8.1

Other types of pipe or tube investigated for suitability in automatic sprinkler installations and listed for thisservice, including but not limited to CPVC and steel, and differing from that provided in Table 6.3.1.1 shallbe permitted where installed in accordance with their listing limitations, including installation instructions.

6.3.7.8.2

Pipe or tube listed for light hazard occupancies shall be permitted to be installed in ordinary hazard rooms

of otherwise light hazard occupancies where the room does not exceed 400 ft2 (37 m2).

6.3.7.8.2.1

Pipe or tube installed in accordance with 6.3.7.8.2 shall be permitted to be installed exposed, inaccordance with the listing.

6.3.7.8.3

Pipe or tube shall not be listed for portions of an occupancy classification.

6.3.7.8.4

Bending of listed pipe and tubing shall be permitted as allowed by the listing.

6.3.7.9 Pipe and Tube Bending.


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6.3.7.9.1

Bending of Schedule 10 steel pipe, or any steel pipe of wall thickness equal to or greater than Schedule10 and Types K and L copper tube, shall be permitted when bends are made with no kinks, ripples,distortions, or reductions in diameter or any noticeable deviations from round.

6.3.7.9.2

For Schedule 40 and copper tubing, the minimum radius of a bend shall be six pipe diameters for pipesizes 2 in. (50 mm) and smaller and five pipe diameters for pipe sizes 21⁄2 in. (65 mm) and larger.

6.3.7.9.3

For all other steel pipe, the minimum radius of a bend shall be 12 pipe diameters for all sizes.

6.3.7.9.4

Bending of listed pipe and tubing shall be permitted as allowed by the listing.

6.3.7.10 Pipe and Tube Identification.

6.3.7.10.1*

All pipe, including specially listed pipe allowed by 6.3.7.8, shall be marked along its length by themanufacturer in such a way as to properly identify the type of pipe.

6.3.7.10.2

The marking shall be visible on every piece of pipe over 2 ft (610 mm) long.

6.3.7.10.3

Pipe identification shall include the manufacturer's name, model designation, or schedule.




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CommitteeStatement:

Compatibility consideration is necessary when other materials or chemicals come in contact withnon-metlalic piping and fittings that can cause degradation of performance of the pipe due tointeraction of materials. The revised section 6.3.7 and associated annex text have been reorganizedfor consistency with the language proposed for NFPA 13R. Test methods to determine materialcompatibility for certain products are being developed as part of a project to develop a new ANSIstandard for this application. Therefore, using the compatibility information that is available at thetime of system design is more meaningful.

ResponseMessage:

Public Input No. 27-NFPA 13-2013 [New Section after 6.10]





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6.3.8 Stainless Steel Pipe.

Stainless steel pipe as referenced in the standards listed in Table 6.3.1.1 shall be in accordance withSchedules 10S or 40S pipe.




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Committee Statement: Adding stainless steel as a common sprinkler pipe material.

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6.4 Fittings.

6.4.1

Fittings used in sprinkler systems shall meet or exceed the standards in Table 6.4.1 or be in accordancewith 6.4.2 or 6.4.4.

Table 6.4.1 Fittings Materials and Dimensions


Cast Iron

Cast Iron Threaded Fittings, Class 125 and 250 ASME B16.4

Cast Iron Pipe Flanges and Flanged Fittings ASME B16.1

Malleable Iron

Malleable Iron Threaded Fittings, Class 150 and 300 ASME B16.3

Steel

Factory-Made Wrought Steel Buttweld Fittings ASME B16.9

Buttwelding Ends for Pipe, Valves, Flanges, and Fittings ASME B16.25

Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel forModerate and Elevated Temperatures

ASTM A 234

Steel Pipe Flanges and Flanged Fittings ASME B16.5

Forged Steel Fittings, Socket Welded and Threaded ASME B16.11

Copper

Wrought Copper and Copper Alloy Solder Joint Pressure Fittings ASME B16.22

Cast Copper Alloy Solder Joint Pressure Fittings ASME B16.18

CPVC

Chlorinated Polyvinyl Chloride (CPVC) Specification for Schedule 80 CPVCThreaded Fittings

ASTM F 437

Specification for Schedule 40 CPVC Socket Type Fittings ASTM F 438

Specification for Schedule 80 CPVC Socket Type Fittings ASTM F 439

Bronze Fittings

Cast Bronze Threaded Fittings ASTM B16.15

Stainless Steel

Specification for Wrought Austenitic Stainless Steel Pipe FittingsASTMA403/A403M

6.4.2

In addition to the standards in Table 6.4.1, nonmetallic fittings shall also be in accordance with 6.4.4.

6.4.3 Nonmetallic Fittings.

Nonmetallic fittings in accordance with Table 6.4.1 shall be investigated for suitability in automaticsprinkler installations and listed for this service. Listed nonmetallic fittings shall be installed in accordancewith their listing limitations, including installation instructions.

6.4.3.1*

When nonmetallic fittings are used in combination systems utilizing internally coated steel piping andnonmetallic fittings , the steel pipe shall be investigated listed for compatibility with the nonmetallic fittingsby a testing laboratory. Cutting oils and lubricants used for fabrication of the steel piping shall becompatible with the nonmetallic fitting materials .


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6.4.3.2*

When nonmetallic fittings are used in combination systems utilizing non–internally coated steel pipingand nonmetallic fittings steel pipe that is not internally coated with corrosion inhibitors , no additionalevaluations are required. Cutting oils and lubricants used for fabrication of the steel piping shall becompatible with the nonmetallic fitting materials.

6.4.3.3

When nonmetallic fittings are used in systems utilizing steel pipe, cutting oils and lubricants used forfabrication of the steel piping shall be compatible with the nonmetallic fittings in accordance with6.1.1.6 .

6.4.3.4

Fire-stopping materials intended for use on nonmetallic fitting penetrations shall be investigated forcompatibility with the nonmetallic fitting materials in accordance with 6.1.1.6 .

6.4.4*

Other types of fittings investigated for suitability in automatic sprinkler installations and listed for thisservice, including but not limited to CPVC and steel, and differing from that provided in Table 6.4.1 shallbe permitted when installed in accordance with their listing limitations, including installation instructions.

6.4.5* Fitting Pressure Limits.

6.4.5.1

Standard weight pattern cast-iron fittings 2 in. (50 mm) in size and smaller shall be permitted wherepressures do not exceed 300 psi (20.7 bar).

6.4.5.2

Standard weight pattern malleable iron fittings 6 in. (150 mm) in size and smaller shall be permitted wherepressures do not exceed 300 psi (20.7 bar).

6.4.5.3

Fittings not meeting the requirements of 6.4.5.1 and 6.4.5.2 shall be extra-heavy pattern where pressuresexceed 175 psi (12.1 bar).

6.4.5.4

Cast bronze threaded fittings in accordance with ASTM B 16.15, Cast Bronze Threaded Fittings, shall bepermitted where pressures do not exceed 200 psi (13.7 bar) for Class 125 fittings and 400 psi (27.6 bar)for Class 250 fittings.

6.4.5.5

Listed fittings shall be permitted for system pressures up to the limits specified in their listings.

6.4.6* Couplings and Unions.

6.4.6.1

Screwed unions shall not be used on pipe larger than 2 in. (50 mm).

6.4.6.2

Couplings and unions of other than screwed-type shall be of types listed specifically for use in sprinklersystems.

6.4.7 Reducers and Bushings.

6.4.7.1

Unless the requirements of 6.4.7.2 or 6.4.7.3 are met, a one-piece reducing fitting shall be used wherevera change is made in the size of the pipe.

6.4.7.2

Hexagonal or face bushings shall be permitted in reducing the size of openings of fittings when standardfittings of the required size are not available.

6.4.7.3

Hexagonal bushings as permitted in 8.15.20.2 shall be permitted to be used.

6.4.7.4

The requirements of 6.4.7.1 and 6.4.7.2 shall not apply to CPVC fittings.


6.4.8.1

The outlet diameter of the extension fitting shall be equal to the inlet diameter of the sprinkler.

6.4.8.2

A single extension fitting up to a maximum of 2 in. (50 mm) in length shall be permitted to be installedwith a sprinkler.


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6.4.8.2.1

The extension fitting shall be included in the hydraulic calculations.

6.4.8.2.2

The requirement of 6.4.8.2.1 shall not apply where the sprinkler is listed for use with the extensionnipple.




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Committee Statement

CommitteeStatement:

CPVC is a plastic material and compatibility consideration is necessary when other materials orchemicals come in contact with CPVC that can cause degradation of performance of the pipe due tointeraction of materials. The revised section 6.3.7 and associated annex text have been reorganizedfor consistency with the language proposed for NFPA 13R. Test methods to determine materialcompatibility for certain products are being developed as part of a project to develop a new ANSIstandard for this application. Therefore, using the compatibility information that is available at thetime of system design is more meaningful.

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6.4.8.1

The outlet diameter of the extension fitting shall be equal to the inlet diameter of the sprinkler.

6.4.8.2

A single extension fitting up to a maximum of 2 in. (50 mm) in length shall be permitted to be installedwith a sprinkler.

6.4.8.2.1

The extension fitting shall be included in the hydraulic calculations.

6.4.8.2.2

The requirement of 6.4.8.2.1 shall not apply where the sprinkler is listed for use with the extensionnipple.




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CommitteeStatement:

The use of sprinkler extension (cheater) nipples has become commonplace without regard forfriction loss or concern for the number of nipples used. During inspections and re-model work, Ihave witnessed as many as five extension nipples stacked at a single sprinkler. Installers should bere-cutting the drop nipple rather than stacking these un-listed sprinkler head extenders.

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6.6* Hangers.

Hangers shall be in accordance with the requirements of Section 9.1 .




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Committee Statement

CommitteeStatement:

NFPA 13 chapters have been in the current format since the 2002 edition. It is unnecessary tohave section 6.6 Hangers in chapter 6 and refer the user to chapter 9. if this is needed, then thesection should be revised to include bracing and restraint.

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6.6.4.1

All control, drain, venting, and test connection valves shall be provided with permanently markedweatherproof metal or rigid plastic identification signs.




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CommitteeStatement:

Venting trapped air in a wet system can help manage problems in four areas: water delivery time,alarm ring delay, water flow alarm cyclic ringing, and corrosion activity. Trapped air in wet systemsdrastically increases corrosion by increasing the oxygen concentration in the water. When air getstrapped with water under pressure, the concentration of dissolved oxygen can rise upwards to 35 –40ppm (6-8ppm is common tap water). Corrosion rates respond linearly to dissolved oxygenconcentrations. In wet sprinkler systems visual evidence of trapped air corrosion is seen along theair-water interface line. This creates opportunities for the formation of tubercles and other corrosiondeposits that can affect water design flow, cause blockages, and even lead to leaks. As a means foraddressing these concerns, new language for pipe venting has been added to sections 7.1.5, 8.16.6,25.6.2, and 6.7.4.1.

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7.1.5 Air Venting.

A single, air vent with a connection shall be provided on each wet pipe system utilizing black orgalvanized steel pipe as a means for venting.




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7.2.6.6.3

The automatic air supply to more than one dry pipe system shall be connected to enable individualmaintenance of air pressure in each system.

7.2.6.6.3.1

Each dry pipe system shall have an air maintenance device.




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CommitteeStatement:

The original code requirement did not address whether or not each system must have an airmaintenance device. The subsection is added to clarify the requirement.

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7.6.1.2

Antifreeze shall not be used in ESFR systems unless the ESFR sprinkler is listed for use with theantifreeze solution.




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Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition orsituation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scale


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ignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

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7.6.2* Antifreeze Solutions.

7.6.2.1*

Except as permitted in 7.6.2.2, antifreeze solutions shall be listed for use in sprinkler systems.

7.6.2.2

Premixed antifreeze solutions of propylene glycol shall be permitted to be used with ESFR sprinklerswhere the ESFR sprinklers are listed for such use in a specific application.




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Committee Statement

CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition orsituation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the development


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of the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scaleignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

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7.6.3.4

A listed 1⁄2 in. (12 mm) relief valve shall be permitted in lieu of the expansion chamber required in 7.6.3.3,and as illustrated in Figure 7.6.3.4 , provided the antifreeze system volume does not exceed 40 gal (151L) as illustrated in Figure 7.6.3.4 .

Figure 7.6.3.4 Arrangement of Supply Piping with Relief Valve and Backflow Device.



NFPA_13_7.6.3.4.png Revised image



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Committee Statement

CommitteeStatement:

The change to Figure 7.6.3.4 would eliminate having someone think that by adding the Relief Valve,the means for conducting the full forward flow test does not have to be piped in to the system, asshown in figure 7.6.3.3.The revisions to the drawing illustrate that the relief valve is not the meansfor conducting the full flow test (PI 52). Specific revisions to the figure are as follows: 1)Insert testoutlet and control valve (and notes) from Fig 7.6.3.3 between the backflow and the tee. 2)ReverseArrow on Check Valve

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7.7 Automatic Sprinkler Systems with Non–Fire Protection Connections.

7.7.1 Circulating Closed-Loop Systems.

7.7.1.1 System Components.

7.7.1.1.1

A circulating closed-loop system is primarily a sprinkler system and shall comply with all provisions ofthis standard such as those for control valves, area limitations of a system, alarms, fire departmentconnections, sprinkler spacing, and so forth, except as modified by Section 7.7 .

7.7.1.1.2

Piping, fittings, valves, and pipe hangers shall meet the requirements specified in Chapter 6 .

7.7.1.1.3

Unless the requirements of 7.7.1.1.4 are met, a dielectric fitting shall be installed in the junction wheredissimilar piping materials are joined (e.g., copper to steel).

7.7.1.1.4

Dielectric fittings shall not be required in the junction where sprinklers are connected to piping.

7.7.1.1.5

Other auxiliary devices shall not be required to be listed for sprinkler service; however, these devices,such as pumps, circulating pumps, heat exchangers, radiators, and luminaires, shall be pressure ratedat 175 psi or 300 psi (12.1 bar or 20.7 bar) (rupture pressure of five times rated water system workingpressure) to match the required rating of sprinkler system components.

7.7.1.1.6

Auxiliary devices shall incorporate materials of construction and be so constructed that they willmaintain their physical integrity under fire conditions to avoid impairment to the fire protection system.

7.7.1.1.7

Auxiliary devices, where hung from the building structure, shall be supported independently from thesprinkler portion of the system, following recognized engineering practices.

7.7.1.2* Hydraulic Characteristics.

Piping systems for attached heating and cooling equipment shall have auxiliary pumps or anarrangement made to return water to the piping system in order to ensure the following:

(1) Water for sprinklers shall not be required to pass through heating or cooling equipment.

(2) At least one direct path shall exist for waterflow from the sprinkler water supply to every sprinkler.

(3) Pipe sizing in the direct path shall be in accordance with the design requirements of this standard.

(4) No portions of the sprinkler piping shall have less than the sprinkler system design pressure,regardless of the mode of operation of the attached heating or cooling equipment.

(5) There shall be no loss or outflow of water from the system due to or resulting from the operation ofheating or cooling equipment.

(6) Shutoff valves and a means of drainage shall be provided on piping to heating or coolingequipment at all points of connection to sprinkler piping and shall be installed in such a manner asto make possible repair or removal of any auxiliary component without impairing the serviceabilityand response to the sprinkler system.

(7) All auxiliary components, including the strainer, shall be installed on the auxiliary equipment sideof the shutoff valves.

7.7.1.3 Water Temperature.

7.7.1.3.1 Maximum.

7.7.1.3.1.1

In no case shall maximum water temperature flowing through the sprinkler portion of the system exceed120°F (49°C).


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7.7.1.3.1.2

Protective control devices listed for this purpose shall be installed to shut down heating or coolingsystems when the temperature of water flowing through the sprinkler portion of the system exceeds120°F (49°C).

7.7.1.3.1.3

Where the water temperature exceeds 100°F (37.8°C), intermediate or higher temperature–ratedsprinklers shall be used.

7.7.1.3.2 Minimum.

Precautions shall be taken to ensure that temperatures below 40°F (4°C) are not permitted.

7.7.1.4 Obstruction to Discharge.

Automatic sprinklers shall not be obstructed by auxiliary devices, piping, insulation, and so forth, fromdetecting fire or from proper distribution of water.

7.7.1.5 Signs.

7.7.1.5.1

Caution signs shall be attached to all valves controlling sprinklers.

7.7.1.5.2

The caution sign shall be worded as follows:

This valve controls fire protection equipment. Do not close until after fire has been extinguished. Useauxiliary valves when necessary to shut off supply to auxiliary equipment.

CAUTION: Automatic alarm can be sounded if this valve is closed.

7.7.1.6 Water Additives.

7.7.1.6.1

Materials added to water shall not adversely affect the fire-fighting properties of the water and shall be inconformity with any state or local health regulations.

7.7.1.6.2

Due care and caution shall be given to the use of additives that can remove or suspend scale from olderpiping systems.

7.7.1.6.3

Where additives are necessary for proper system operation, due care shall be taken to ensure thatadditives are replenished after alarm testing or whenever water is removed from the system.

7.7.1.7 Waterflow Detection.

7.7.1.7.1

The supply of water from sprinkler piping through auxiliary devices, circulatory piping, and pumps shallnot under any condition or operation, transient or static, cause false sprinkler waterflow signals.

7.7.1.7.2

A sprinkler waterflow signal shall not be impaired when water is discharged through an opened sprinkleror through the system test connection while auxiliary equipment is in any mode of operation (on, off,transient, stable).




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CommitteeStatement:

Sprinkler systems have become more and more specialized with multiple components being used.With the issues of compatibility rampant in our industry, connection to systems that could causefailure of individual components should be avoided. Users of the standard can refer back to


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previous editions of this design concept.

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8.3.3.1*

Sprinklers in light hazard occupancies shall be one of the following:

(1) Quick-response type as defined in 3.6.4.8 3.6.4.7

(2) Residential sprinklers in accordance with the requirements of 8.4.5

(3) Quick response CMSA sprinklers

(4) ESFR sprinklers

(5) Standard-response sprinklers used for modifications or additions to existing light hazard systemsequipped with standard-response sprinklers

(6) Standard-response sprinklers used where individual standard-response sprinklers are replaced inexisting light hazard systems




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Committee Statement

CommitteeStatement:

The standard requires the use of listed QR standard sprinklers; QR CMSA sprinklers, ESFRsprinklers or Residential sprinklers in light hazard occupancies. A listed standard response sprinklerwith a Fast Response operating element does not meet this requirement. Revised language wouldpermit mixing of QR and listed standard response sprinklers within a compartment.

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8.3.3.2

Where quick-response sprinklers are installed, all sprinklers within a compartment shall be quick-responseunless otherwise permitted in 8.3.3.3 or 8.3.3.4 .




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CommitteeStatement:

The reference to 8.3.3.4 was added to correlate to FR-85. The provisions of 8.3.3.2 should notrestrict the use of QR in-rack sprinklers in a space that includes SR sprinklers at the ceiling. In facta number of design scenarios require such an installation.

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8.3.3.5

The provisions of 8.3.3.2 shall not apply to in-rack sprinklers.




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CommitteeStatement:

The provisions of 8.3.3.2 should not restrict the use of QR in-rack sprinklers in a space thatincludes SR sprinklers at the ceiling. In fact a number of design scenarios require such aninstallation.

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8.4.1.1

Upright and pendent spray sprinklers shall be permitted in all occupancy hazard classifications andbuilding construction types unless the requirements of 8.15.1.6 apply .




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CommitteeStatement:

This is an editorial revision in that the existing statement is not true, since 8.15.1.6 does notpermit the use of standard spray sprinklers in this construction type for any occupancy hazardclassification

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First Revision No. 88-NFPA 13-2013 [ Sections 8.4.2, 8.4.3 ]

8.4.2 Sidewall Spray Sprinklers.

Sidewall sprinklers shall only be installed as follows:

(1) Light hazard occupancies with smooth, horizontal or sloped, flat ceilings

(2) Ordinary hazard occupancies with smooth, flat ceilings where specifically listed for such use

(3) To protect areas below overhead doors

8.4.3 Extended Coverage Sprinklers.

Extended coverage sprinklers shall only be installed as follows:

(1) Unobstructed In unobstructed construction consisting of flat, smooth ceilings with a slope notexceeding a pitch of 1 in 6 (a rise of 2 units in a run of 12 units, a roof slope of 16.7 percent)

(2) Unobstructed In unobstructed or noncombustible obstructed construction, where specifically listedfor such use

(3) Within trusses or bar joists having web members not greater than 1 in. (25.4 mm) maximumdimension or where trusses are spaced greater than 71⁄2 ft (2.3 m) on center and where the ceilingslope does not exceed a pitch of 1 in 6 (a rise of 2 units in a run of 12 units, a roof slope of 16.7percent)

(4) Extended coverage upright and pendent sprinklers installed under smooth, flat ceilings that haveslopes not exceeding a pitch of 1 in 3 (a rise of 4 units in a run of 12 units, a roof slope of 33.3percent), where specifically listed for such use

(5) Extended coverage sidewall sprinklers installed in accordance with 8.9.4.2.2 in slopes exceeding aceiling pitch of 2 in 12 where listed for such use

(6) In each bay of obstructed construction consisting of solid structural members that extend below thedeflector of the sprinkler

(7) Extended coverage sprinklers installed to protect areas below a single overhead door(s)




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CommitteeStatement:

There is no similar requirement for standard sidewall sprinklers to be listed for downwards flow, sothere is no need for an extended coverage sidewall sprinkler to be specially listed. Any sidewallsprinkler that can throw horizontally can most certainly also discharge downwards parallel to theslope. The revision to item (7) restricts use of EC sidewall sprinkler to protect a single overhead dooror doors as opposed to using a single EC sidewall sprinkler capable of covering the area belowmultiple doors.

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8.4.7.2* Galvanized Pipe.

8.4.7.2.1

Where steel pipe is used in preaction and dry pipe systems, piping materials shall be limited to internallygalvanized steel.

8.4.7.2.2

Black steel pipe shall be permitted when the system is installed in freezers where the air temperature isbelow 32°F (0°C) and the air supply is either nitrogen or a listed regenerative air dryer.

8.4.7.2.3

Nongalvanized fittings shall be permitted.




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Committee Statement

CommitteeStatement:

This revision is made in light of the Committee Action and Statement for Comment 13-315 fromthe previous cycle. Based on the widespread concern over corrosion, there is no reason tomandate the extra expense for galvanized pipe, since it may corrode just as rapidly as black steelpipe.

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First Revision No. 89-NFPA 13-2013 [ Section No. 8.5.5.3.1 [Excluding any

Sub-Sections] ]

Sprinklers shall be installed under fixed obstructions over 4 ft (1.2 m) wide in width .




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CommitteeStatement:

In some installations observed, the sprinklers were installed off to the side of the obstruction. Thesprinklers were technically "under" the obstruction in elevation, by not positioned directly under it.Unless installed directly under the obstruction the sprinkler activation could be delayed by heat notreaching it, or from being cold-soldered by sprinklers activating at the roof.

ResponseMessage:

Public Input No. 473-NFPA 13-2013 [Section No. 8.5.5.3.1 [Excluding any Sub-Sections]]


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First Revision No. 90-NFPA 13-2013 [ New Section after 8.5.5.3.1.1 ]

8.5.5.3.1.3

Sprinklers shall not be required under noncombustible obstructions over 4 ft (1.2 m) wide where thebottom of the obstruction is 24 in. (620 mm) or less above the floor or deck.




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CommitteeStatement:

At some point it becomes ineffective to install sprinklers under obstructions that are close to thefloor. The spray pattern of the sprinkler can't develop and the fuel load is so small thatsupplemental sprinkler protection isn't necessary.

ResponseMessage:

Public Input No. 474-NFPA 13-2013 [New Section after 8.5.5.3.1.1]


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First Revision No. 91-NFPA 13-2013 [ New Section after 8.5.5.3.2 ]

8.5.5.3.3

Sprinklers installed under obstructions shall be of the same type (spray, CMSA, ESFR, residential) asinstalled at the ceiling except as permitted by 8.5.5.3.3.1 .

8.5.5.3.3.1

Quick-response spray sprinklers shall be permitted to be utilized under overhead doors.




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CommitteeStatement:

Specific guidance is needed to address the type of sprinklers that are to be installedbeneath an obstruction.

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8.5.5.4 Closets.

In all closets and compartments, including those closets housing mechanical equipment, that are not

larger than 400 ft3 (11.33 m3) in size, a single sprinkler at the highest ceiling space level shall besufficient without regard to obstructions or minimum distance to the wall.




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CommitteeStatement:

The term ceiling space is vague. This section has been revised to use the term ceiling levelwhich is a more accurate descriptor.

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8.5.7.3

A sprinkler installed directly beneath a skylight not exceeding 32 ft 2 (3 m 2 ) shall measure thedistance to the ceiling to the plane of the ceiling and not to the top of the skylight.




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Committee Statement

CommitteeStatement:

This statement is needed to clarify that deflector distance of a sprinkler located under askylight is not measured to the top of the skylight.

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First Revision No. 96-NFPA 13-2013 [ Section No. 8.6.4.1.1.3 [Excluding any

Sub-Sections] ]

The requirements of 8.6.4.1.1.1 shall not apply for light and ordinary hazard occupancies with ceilings ofnoncombustible or limited-combustible construction where either 8.6.4.1.1.3(A) or 8.6.4.1.1.3(B)applies .




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Committee Statement

CommitteeStatement:

The addition of "where the following conditions exist:" clarifies that the exception granted by8.6.4.1.1.3 is only applicable where the ceiling elevation changes. Currently, one could argue thatthe sentence of 8.6.4.1.1.3 could be taken stand-alone, thereby allowing SSU/SSP sprinklers to beinstalled an unspecified distance below a ceiling meeting the specified characteristics. This alsoclarifies that the exception is really to the "throughout the area of coverage of the sprinkler" portion of8.6.4.1.1.1, not the deflector distance limitations portion.

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Public Input No. 157-NFPA 13-2013 [Section No. 8.6.4.1.1.3 [Excluding any Sub-Sections]]


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8.6.4.1.2 Obstructed Construction.

Under obstructed construction, the sprinkler deflector shall be located in accordance with one of thefollowing arrangements:

(1) Installed with the deflectors within the horizontal planes of 1 in. to 6 in. (25.4 mm to 152 mm) belowthe structural members and a maximum distance of 22 in. (559 mm) below the ceiling/roof deck

(2) Installed with the deflectors at or above the bottom of the structural member to a maximum of 22 in.(559 mm) below the ceiling/roof deck where the sprinkler is installed in conformance with 8.6.5.1.2

(3) Installed in each bay of obstructed construction, with the deflectors located a minimum of 1 in. (25.4mm) and a maximum of 12 in. (305 mm) below the ceiling

(4) Installed with the deflectors within the horizontal planes 1 in. to 6 in. (25.4 mm to 152 mm) belowcomposite wood joists to a maximum distance of 22 in. (559 mm) below the ceiling/roof deck onlywhere joist channels are fire-stopped to the full depth of the joists with material equivalent to the web

construction so that individual channel areas do not exceed 300 ft2 (27.9 m2)

(5)




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Committee Statement

CommitteeStatement:

Concrete tees are capable of withstanding the heat long enough for sprinklers to activate evenwhen the tees are closer than 3 feet on centers.

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* Installed with deflectors of sprinklers under concrete tee construction with stems spaced less than71⁄2 ft (2.3 m) but more than 3 ft (0.91 m) on centers, regardless of the depth of the tee, located at orabove a horizontal plane 1 in. (25.4 mm) below the bottom of the stems of the tees and complyingwith Table 8.6.5.1.2


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First Revision No. 99-NFPA 13-2013 [ Section No. 8.6.4.1.4.1 ]

8.6.4.1.4.1

Sprinklers under a roof or ceiling in combustible concealed spaces of wood joist or wood trussconstruction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater shall be quick-response.




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CommitteeStatement:

This removes redundant words already used in the heading of this section. This revision doesnot result in a technical change to the standard.

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8.6.4.1.4.2

Sprinklers under a roof or ceiling in combustible concealed spaces of wood joist or wood trussconstruction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater shall be installed so that a row of sprinklers is installed within 12 in. (305 mm) horizontally of thepeak and between 1 in. and 12 in. (25.4 mm and 305 mm) down from the bottom of the top chordmember.




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8.6.4.1.4.3

Sprinklers under a roof or ceiling in combustible concealed spaces of wood joist or wood trussconstruction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater shall be installed so that the sprinklers installed along the eave are located not less than 5 ft (1.52m) from the intersection of the upper and lower truss chords or the wood rafters and ceiling joists.




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8.6.4.1.4.5

The requirements of 8.6.4.1.4.4 shall not apply to sprinklers installed at the corner of the eave of a hiptype roof where located not less than 5 ft (1.52 m) from the intersection of the upper and lower trusschords or the wood rafters and ceiling joists.




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CommitteeStatement:

New 8.6.4.1.4.4.1 allows an attic to be protected without having to apply the minimum of 20-psirequirement for the one sprinkler located at the corner of an eave of a hip type roof. The issue is notthat the corner is inadequately protected. The minimum spacing from the intersection of the upperand bottom of the truss chords causes the sprinkler end head pressure to be a minimum of 20 psi.The head spacing over 8 ft but less than 10 ft is critical for sprinklers located at the peak. Thespacing is less critical along the eave and should not impose a 20 psi minimum end head pressurefor sprinklers at the peak spaced 8 ft or less.

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8.6.4.1.4.4

Sprinklers under a roof or ceiling in combustible concealed spaces of combustible wood joist or woodtruss construction with members less than 3 ft (0.91 m) on center and a slope having a pitch of 4 in 12 orgreater, and using standard spray sprinklers, installed where the dimension perpendicular to the slopeexceeds 8 ft (2.4 m), shall have a minimum pressure of 20 psi (1.4 bar).




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8.6.4.1.4.6

The special requirements of 8.6.2.2.1 and 8.6.4.1.4for sprinklers under a roof or ceiling in combustibleconcealed spaces of wood joist or wood truss construction with members less than 3 ft (0.91 m) on centerand a slope having a pitch of 4 in 12 or greater shall not apply when the exposed combustible sheathingin the roof or ceiling space are constructed of pressure impregnated fire-retardant treated fire retardant–treated wood as defined by NFPA 703.




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8.6.5.1.2*


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Sprinklers shall be arranged to comply with one of the following arrangements:

(1) Subsection 8.5.5.2, Table 8.6.5.1.2, and Figure 8.6.5.1.2(a) shall be followed.

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions not exceeding 4 ft (1.2 m) inwidth, provided the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance permitted between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall be permitted tobe protected in accordance with Figure 8.6.5.1.2(b) .

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall be permitted tobe protected in accordance with Figure 8.6.5.1.2(c). The maximum distance between the sprinkler andthe wall shall be measured from the sprinkler to the wall behind the obstruction and not to the face of theobstruction.

Table 8.6.5.1.2 Positioning of Sprinklers to Avoid Obstructions to Discharge [Standard SprayUpright/Standard Spray Pendent (SSU/SSP)]

Distance from Sprinklersto

Side of Obstruction (A)

Maximum Allowable Distance of Deflector Above Bottom of Obstruction(B) (in.)

Less than 1 ft 0

1 ft to less than 1 ft 6 in. 21⁄2

1 ft 6 in. to less than 2 ft 31⁄2




3 ft 6 in. to less than 4 ft 12

4 ft to less than 4 ft 6 in. 14







For SI units, 1 in. = 25.4 mm; 1 ft = 0.3048 m.

Note: For A and B, refer to Figure 8.6.5.1.2(a).

Figure 8.6.5.1.2(a) Positioning of Sprinkler to Avoid Obstruction to Discharge (SSU/SSP).


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Figure 8.6.5.1.2(b) Obstruction Against Wall (SSU/SSP).

Figure 8.6.5.1.2(c) Obstructions Against Walls (SSU/SSP).


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FR_105.pdf Fig 8.6.5.1.2 (c)




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CommitteeStatement:

It is not necessary to require an obstruction against a wall to more than 18“ below the deflector. If it isless than 18” then it is just a smaller obstruction to the sprinkler spray. The requirement for anobstruction to be 18” below a sprinkler deflector is not relevant in the situation presented in theseillustrations. Further, the distance of the sprinkler from the wall should be limited to one half (½ S) of theallowable sprinkler spacing (S).

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8.6.5.3.6

The deflector of automatic sprinklers installed under fixed obstructions shall be positioned no more than12 in. (305 mm) below the bottom of the obstruction.




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Committee Statement

CommitteeStatement:

Because no specific guidance is given in the standard, automatic sprinklers are being installedwith their deflectors more than 12 inches below open grate mezzanines and large ducts such thatactuation over a developing fire is unlikely. This language provides specific guidance on this issue.

ResponseMessage:



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8.6.5.3.7

Sprinklers installed under round ducts shall be of the intermediate level/rack storage type or otherwiseshielded from the discharge of overhead sprinklers.




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CommitteeStatement:

Round ductwork over 4 ft in diameter presents a special problem. Operating sprinklers locatedabove the ducts will discharge water onto the duct, and surface tension will cause the water to clingto the outside surface of the duct. Much of the discharge is expected to flow around the duct, andthen impinge upon the sprinkler that is located below the duct. This would cool the operating elementof the sprinkler, making actuation over a developing fire unlikely. By requiring that sprinklers locatedbelow round duct in excess of 4 ft in diameter be shielded from the discharge of overhead sprinklers,these sprinklers should be able to function properly in a fire situation.

ResponseMessage:



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8.6.6.2.1

Where shelving is installed on a wall and is not directly below sprinklers, the shelves, including storagethereon, shall be permitted to extend above the level of a plane located 18 in. (457 mm) below ceilingsprinkler deflectors.




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CommitteeStatement:

This section of the code is improperly worded. The intent of the section is to permit the storageto be within 18 inches of the sprinkler, not require it.

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8.7.4.1.4* Soffits and Cabinets.

Where soffits are used for the installation of sidewall sprinklers, the sprinklers and soffits shall beinstalled in accordance with 8.7.4.1.4.1 , 8.7.4.1.4.2 , or 8.7.4.1.4.3 .

8.7.4.1.4.1

Where soffits exceed more than 8 in. (203 mm) in width or projection from the wall, pendent sprinklersshall be installed under the soffit.

8.7.4.1.4.2

Sidewall sprinklers shall be permitted to be installed in the face of a soffit located directly over cabinets,without requiring additional sprinklers below the soffit or cabinets, where the soffit does not projecthorizontally more than 12 in. (305 mm) from the wall.

8.7.4.1.4.3

Where sidewall sprinklers are more than 3 ft (0.91 m) above the top of cabinets, the sprinkler shall bepermitted to be installed on the wall above the cabinets where the cabinets are no greater than 12 in.(305 mm) from the wall.



A.8.7.4.1_FR110.docx




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CommitteeStatement:

Employee break rooms are similar to kitchens in residential dwelling units. This allows the sameguidance for standard spray sidewalls as allowed for extended coverage sprinklers in 8.9.4.1.4and residential sprinklers in 8.10.7.1.5.

ResponseMessage:



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A.8.7.4.1.4 The requirements in 8.7.4.1.4 were developed from years of experience with NFPA 13 obstruction requirements and an additional test series conducted by the National Fire Sprinkler Association with the help of Tyco International (Valentine and Isman, Kitchen Cabinets and Residential Sprinklers, National Fire Sprinkler Association, November 2005), which included fire modeling, distribution tests, and full-scale fire tests. The test series showed that pendent sprinklers definitely provide protection for kitchens, even for fires that start under the cabinets. The information in the series was less than definitive for sidewall sprinklers, but distribution data show that sprinklers in the positions in this standard provide adequate water distribution in front of the cabinets and that sidewall sprinklers should be able to control a fire that starts under the cabinets. When protecting kitchens or similar rooms with cabinets, the pendent sprinkler should be the first option. If pendent sprinklers cannot be installed, the next best option is a sidewall sprinkler on the opposite wall from the cabinets, spraying in the direction of the cabinets. The third best option is the sidewall sprinkler on the same wall as the cabinets, on a soffit flush with the face of the cabinet. The last option should be putting sprinklers on the wall back behind the face of the cabinet because this location is subject to being blocked by items placed on top of the cabinets. It is not the intent of the committee to require sprinklers under kitchen cabinets.


8.7.4.1.3.2*

Where soffits used for the installation of sidewall sprinklers are less than or equal to 8 in. (203 mm) inwidth or projection from the wall, additional sprinklers shall not be required below the soffit when thesidewall sprinkler is installed on the soffit is within 4 in. (102 mm) from the bottom of the soffit .




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CommitteeStatement:

When the 8-inch rule was originally accepted, the idea was not to get direct water spray from thesprinkler back behind the soffit. The idea was to define a small area where direct water spray wouldnot be necessary and a curtain of water would drop straight down from the soffit preventing firespread beyond the 8-inch width space. There are times when the sprinkler cannot be located within4 inches of the bottom of a soffit and there is no need to put a pendent sprinkler under such a skinnyobject.

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8.8.3.4.2

Sprinklers shall be permitted to be placed less than 6 ft (1.8 m) 8 ft (2.4 m) on center where the followingconditions are satisfied:

(1) Baffles shall be arranged to protect the actuating elements.

(2) Baffles shall be of solid and rigid material that will stay in place before and during sprinkler operation.

(3) Baffles shall be not less than 8 in. (203 mm) long and 6 in. (152 mm) high.

(4) The tops of baffles shall extend between 2 in. and 3 in. (51 mm and 76 mm) above the deflectors ofupright sprinklers.

(5) The bottoms of baffles shall extend downward to a level at least even with the deflectors of pendentsprinklers.




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CommitteeStatement:

The change would fix a typographical error which creates an inconsistency in this sectionof the code.

Response Message:



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First Revision No. 113-NFPA 13-2013 [ Section No. 8.8.4.1.1.4(B) ]

(B)*

Where the distance between the upper ceiling and the sprinkler deflector is less than or equal to 36 in.(914 mm), the sprinklers shall be permitted to be spaced as though the ceiling were flat, provided theobstruction rules and ceiling pocket rules are observed are observed .




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CommitteeStatement:

The ceiling pocket rules are not pertinent to this guidance. This change matches the currenttext in 8.6.4.1.1.4 (B).

ResponseMessage:

Public Input No. 253-NFPA 13-2013 [Section No. 8.8.4.1.1.4(B)]


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8.8.4.1.2 Obstructed Construction.

Under obstructed construction, the sprinkler deflector shall be located in accordance with one of thefollowing arrangements:

(1) Installed with the deflectors within the horizontal planes of 1 in. to 6 in. (25.4 mm to 152 mm) belowthe noncombustible structural members and a maximum distance of 22 in. (559 mm) below theceiling/roof deck

(2) Installed with the deflectors at or above the bottom of the noncombustible structural member to amaximum of 22 in. (559 mm) below the noncombustible ceiling/roof deck where the sprinkler isinstalled in conformance with 8.8.5.1.2

(3) Installed in each bay of combustible or noncombustible obstructed construction, with the deflectorslocated a minimum of 1 in. (25.4 mm) and a maximum of 12 in. (305 mm) below the ceiling

(4) Installed in accordance with their listing where sprinklers are listed for use under other ceilingconstruction features or for different distances




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CommitteeStatement:

This provides a reminder that this section applies to noncombustible obstructed constructionper 8.4.3(2) in nos. (1) and (2).

ResponseMessage:



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CommitteeStatement:

This new section provides language on how to position the deflector where sprinklers areinstalled under slightly sloped roofs. This language parallels section 8.6.4.2 regarding upright andpendent standard spray sprinklers.

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8.8.5.1.2*


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Sprinklers shall be arranged to comply with one of the following arrangements:

(1) Sprinklers shall be in accordance with 8.5.5.2, Table 8.8.5.1.2, and Figure 8.8.5.1.2(a) .

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions not exceeding 4 ft (1.2m) in width provided the distance from the centerline of the obstruction to the sprinklers does notexceed one-half the allowable distance permitted between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall bepermitted to be protected in accordance with Figure 8.8.5.1.2(b).

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall bepermitted to be protected in accordance with Figure 8.8.5.1.2(c). The maximum distance betweenthe sprinkler and the wall shall be measured from the sprinkler to the wall behind the obstruction andnot to the face of the obstruction.

Table 8.8.5.1.2 Position of Sprinklers to Avoid Obstructions to Discharge (Extended Coverage Uprightand Pendent Spray Sprinklers)

Distance from Sprinklersto


Maximum Allowable Distance of Deflector Above Bottom ofObstruction (B) (in.)

Less than 1 ft 0




















Note: For A and B, refer to Figure 8.8.5.1.2(a).

Figure 8.8.5.1.2(a) Position of Sprinkler to Avoid Obstruction to Discharge (Extended CoverageUpright and Pendent Spray Sprinklers).


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Figure 8.8.5.1.2(b) Obstructions Against Walls (Extended Coverage Upright and Pendent SpraySprinklers).

Figure 8.8.5.1.2(c) Obstructions Against Walls (Extended Coverage Upright and Pendent SpraySprinklers).


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CommitteeStatement:

It is not necessary to require an obstruction against a wall to more than 18“ below the deflector. If itis less than 18” then it is just a smaller obstruction to the sprinkler spray. The requirement for anobstruction to be 18” below a sprinkler deflector is not relevant in the situation presented in theseillustrations. Further, the distance of the sprinkler from the wall should be limited to one half (½ S) of


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the allowable sprinkler spacing (S).

ResponseMessage:


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8.8.5.3.5

The deflector of automatic sprinklers installed under fixed obstructions shall be positioned no more than12 in. (305 mm) below the bottom of the obstruction.




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Committee Statement

CommitteeStatement:

Because no specific guidance is given in the standard, automatic sprinklers are being installedwith their deflectors more than 12 inches below open grate mezzanines and large ducts such thatactuation over a developing fire is unlikely.

ResponseMessage:



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8.8.5.3.6

Sprinklers installed under round ducts shall be of the intermediate level/rack storage type or otherwiseshielded from the discharge of overhead sprinklers.




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ResponseMessage:



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8.9.4.1.3.1*

Where soffits used for the installation of sidewall sprinklers are less than or equal to 8 in. (203 mm) inwidth or projection from the wall, additional sprinklers shall not be required below the soffit when thesidewall sprinkler on the soffit is within 4 in. (102 mm) from the bottom of the soffit .




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CommitteeStatement:

When the 8-inch rule was originally accepted, the idea was not to get direct water spray from thesprinkler back behind the soffit. The idea was to define a small area where direct water spray wouldnot be necessary and a curtain of water would drop straight down from the soffit preventing firespread beyond the 8-inch width space. There are times when the sprinkler cannot be located within4 inches of the bottom of a soffit and there is no need to put a pendent sprinkler under such a skinnyobject.

ResponseMessage:



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8.9.5.1.3

The distance between light fixtures or similar obstructions located more than 8 ft (2.4 m) from the sprinklershall be in conformance with Table 8.9.5.1.3 and Figure 8.9.5.1.3.

Table 8.9.5.1.3 Positioning of Sprinklers to Avoid Obstructions (Extended Coverage Sidewall SpraySprinklers)

Distance from Sidewall Sprinkler to Sideof Obstruction (A)

Maximum Allowable Distance of Deflector AboveBottom of Obstruction (B) (in.)

Less than 8 ft Not allowed

8 ft to less than 10 ft 1








17 ft or greater 14


Note: For A and B, refer to Figure 8.9.5.1.3.

Figure 8.9.5.1.3 Positioning of Sprinkler to Avoid Obstruction (Extended Coverage SidewallSpray Sprinklers).




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8-9-5-1-3.jpg 8.9.5.1.3




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CommitteeStatement:

Figure 8.7.5.1.3 attempts to clarify two issues with respect to the beam rule and sidewall sprinklers.First, that when sprinkler spray needs to get under an obstruction, there needs to be some clearspace above the sprinkler deflector. Too many people using NFPA 13 think that the obstructions atthe same elevation as the deflector are acceptable (which would be true for pendent and uprightsprinklers). But sidewall sprinklers need 4 inches of clear space above the deflector as well. Thesecond concern is a clarification of the type of obstruction applicable to this rule. Skinny obstructionsthat meet the "four-times rule" should not have to worry about water spray only going under theobstruction. In this case, the four-times rule should be sufficient for sprinkler spray patterns todevelop. A 4 inch wide light fixture is not going to be any worse than a 4 inch wide column using thefour-times rule.Unlike SSW, EC sidewalls require an arc spray discharge to reach the entire hazard)

ResponseMessage:



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8.9.5.1.5 Isolated Obstructions.

Isolated obstructions projecting from the same wall as the one on which the extended coverage sidewallsprinkler is mounted shall be located a minimum of 6 in. (152 mm) from the sidewall sprinkler.




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CommitteeStatement:

In 2007, the committee added a 4" distance requirement for standard sidewall sprinklers to belocated from isolated obstructions on the same wall, such as smoke detectors and horn/strobes, butdid not address the same requirement for extended coverage sidewall sprinklers. Guidance is nowprovided for positioning extended coverage sidewall sprinklers away from isolated obstructions onthe same wall to ensure adequate wall wetting behind the sprinkler.

ResponseMessage:



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First Revision No. 121-NFPA 13-2013 [ Sections 8.9.5.1.4, 8.9.5.1.5 ]


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8.9.5.1.4


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Continuous obstructions projecting from the same wall as the one on which the sidewall sprinkler ismounted shall be in accordance with Table 8.9.5.1.4 and Figure 8.9.5.1.4 . one of the followingarrangements:

(1) Sprinklers shall be installed in accordance with Table 8.9.5.1.4 and Figure 8.9.5.1.4(a) .

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions less than 4 ft (1.22 m)in width where the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall bepermitted to be protected in accordance with Figure 8.9.5.1.4(b) .

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall bepermitted to be protected in accordance with Figure 8.9.5.1.4(c) . The maximum distance betweenthe sprinkler and the wall shall be measured from the sprinkler to the wall behind the obstructionand not to the face of the obstruction.

Table 8.9.5.1.4 Positioning of Sprinklers to Avoid Obstructions Along Wall (Extended Coverage SidewallSpray Sprinklers)



Less than 1 ft 6 in. 0









Note: For A and B, refer to Figure 8.9.5.1.4 Figure 8.9.5.1.4(a) .

Figure 8.9.5.1.4(a) Positioning of Sprinkler to Avoid Obstruction Along Wall (Extended CoverageSidewall Spray Sprinklers).

Figure 8.9.5.1.4(b) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).


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Figure 8.9.5.1.4(c) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).

8.9.5.1.6

Sprinklers shall be permitted to be spaced on opposite sides of obstructions less than 4 ft (1.22 m) inwidth where the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance between sprinklers.



FR_121_8-9-5-1-4.tiff Figures b and c




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Committee Statement

CommitteeStatement:

For obstructions to the side of extended coverage sidewall sprinklers, the same four optionsshould apply as when dealing with extended coverage upright and pendent sprinklers. Thislanguage parallels section 8.8.5.1.2 and provides the same 4 options in a user friendly format.

ResponseMessage:

Public Input No. 373-NFPA 13-2013 [Sections 8.9.5.1.4, 8.9.5.1.5]


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First Revision No. 122-NFPA 13-2013 [ Sections 8.9.5.2.1.3, 8.9.5.2.1.4 ]

8.9.5.2.1.3*

Unless the requirements of 8.9.5.2.1.4 through 8.9.5.2.1.5 8.9.5.2.1.6 are met, sprinklers shall bepositioned away from obstructions a minimum distance of four times the maximum dimension of theobstruction (e.g., truss webs and chords, pipe, columns, and fixtures). The maximum clear distancerequired shall be 36 in. (914 mm) from the sprinkler. in accordance with Figure 8.9.5.2.1.3 .

Figure 8.9.5.2.1.3 Minimum Distance from Obstruction (Extended Coverage Sidewall).

8.9.5.2.1.4

Sidewall sprinklers shall be positioned in accordance with Figure 8.9.5.2.1.4 when obstructions arepresent.

Figure 8.9.5.2.1.4 Minimum Distance from Obstruction (Extended Coverage Sidewall).




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CommitteeStatement:

Recent fire testing has shown that there may be an issue with the maximum 36 inch dimension.The sprinkler can be too close to some large obstructions allowing substantial dry area behindlarge objects like big columns.

ResponseMessage:

Public Input No. 339-NFPA 13-2013 [Sections 8.9.5.2.1.3, 8.9.5.2.1.4]


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8.10.2.2

Residential sprinklers shall not be permitted to be used on ceilings with slopes greater than 8 in 12 orceiling with heights greater than 24 ft unless specifically listed for this purpose.




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CommitteeStatement:

The requirement for residential sprinklers to be listed for use on a slope was in the 2010 andprevious editions of NFPA 13. It was eliminated during the 2013 revision cycle due to testing, but thattesting was limited to ceilings with slopes of 8 in 12 and heights of 24 ft. In situations where theceiling exceeds these limits, residential sprinklers still need to be specially listed for the steep slope,or residential sprinklers should not be used. NFPA 13 allows the use of quick response sprinklers inresidential occupancies (as light hazard) and these sprinklers are more applicable to steeply pitchedsituations due to the known design area increases already incorporated into Chapter 11.

ResponseMessage:



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8.10.4.7 Deflector Orientation (Residential Upright and Pendent Spray).

8.10.4.7.1

Unless the requirements of 8.10.4.7.2 or 8.10.4.7.3 are met, deflectors of upright and pendentsprinklers shall be aligned parallel to ceilings, roofs, or the incline of stairs.

8.10.4.7.2

Where upright or pendent sprinklers are installed at the peak below a sloped ceiling or roof surface, thesprinkler shall be installed with the deflector horizontal.

8.10.4.7.3

Roofs and ceilings having a pitch not exceeding 2 in 12 (16.7 percent) are considered horizontal in theapplication of 8.10.4.7 , and upright and pendent sprinklers shall be permitted to be installed withdeflectors horizontal.




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CommitteeStatement:

Guidance has been added on upright and pendent residential sprinkles and the deflectororientation under the ceiling or roof. While section 8.5 provides some general guidance, morespecific information is needed that parallels 8.6.4.2.

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8.10.7.1.3

The distance between light fixtures or similar obstructions located more than 8 ft (2.4 m) from the sprinklershall be in conformance with Table 8.10.7.1.3 and Figure 8.10.7.1.3.

Table 8.10.7.1.3 Positioning of Sprinklers to Avoid Obstructions (Residential Sidewall Sprinklers)



Less than 8 ft Not allowed









17 ft or greater 14


Note: For A and B, refer to Figure 8.10.7.1.3.

Figure 8.10.7.1.3 Positioning of Sprinkler to Avoid Obstruction (Residential Sidewall Sprinklers).


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8-10-7-1-3.jpg 8.10.7.1.3




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CommitteeStatement:

The new Figure 8.10.7.1.3 attempts to clarify two issues with respect to the beam rule and sidewallsprinklers. First, that when sprinkler spray needs to get under an obstruction, there needs to be someclear space above the sprinkler deflector. Too many people using NFPA 13 think that the obstructionsat the same elevation as the deflector are acceptable (which would be true for pendent and uprightsprinklers). But sidewall sprinklers need 4 inches of clear space above the deflector as well. Thesecond concern is a clarification of the type of obstruction applicable to this rule. Skinny obstructionsthat meet the "four-times rule" should not have to worry about water spray only going under theobstruction. In this case, the four-times rule should be sufficient for sprinkler spray patterns todevelop. A 4 inch wide light fixture is not going to be any worse than a 4 inch wide column using thefour-times rule.

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8.10.7.1.4


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Obstructions Continuous obstructions projecting from the same wall as the one on which the sidewallsprinkler is mounted shall be in accordance with Table 8.10.7.1.4 and Figure 8.10.7.1.4 . one of thefollowing arrangements:

(1) Sprinklers shall be in accordance with Table 8.10.7.1.4 and Figure 8.10.7.1.4(a) .

(2) Sprinklers shall be permitted to be spaced on opposite sides of obstructions less than 4 ft (1.22 m)in width where the distance from the centerline of the obstruction to the sprinklers does not exceedone-half the allowable distance between sprinklers.

(3) Obstructions located against the wall and that are not over 30 in. (762 mm) in width shall bepermitted to be protected in accordance with Figure 8.10.7.1.4(b) .

(4) Obstructions located against the wall and that are not over 24 in. (610 mm) in width shall bepermitted to be protected in accordance with Figure 8.10.7.1.4(c) . The maximum distancebetween the sprinkler and the wall shall be measured from the sprinkler to the wall behind theobstruction and not to the face of the obstruction.

Table 8.10.7.1.4 Positioning of Sprinklers to Avoid Obstructions Along Wall (Residential SidewallSprinklers)

Distance from Sidewall

Sprinkler to


Maximum Allowable Distance of Deflector Above Bottom of

Obstruction (B) (in.)

Less than 1 ft 6 in. 0









Note: For A and B, refer to Figure 8.10.7.1.4 Figure 8.10.7.1.4(a) .

Figure 8.10.7.1.4(a) Positioning of Sprinkler to Avoid Obstruction Along Wall (ResidentialSidewall Sprinklers).

Figure 8.10.7.1.4(b) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).


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Figure 8.10.7.1.4(c) Obstruction Against Wall (Standard Sidewall Spray Sprinklers).



FR_126_8-10-7-1-4.tiff Figs b and c




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Committee Statement

CommitteeStatement:

For obstructions to the side of residential sidewall sprinklers, the same four options should applyas when dealing with pendent residential sprinklers. This language parallels section 8.10.6.1.2and provides the same 4 options in a user friendly format.

ResponseMessage:



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8.10.7.3.5

The deflector of automatic sprinklers installed under fixed obstructions shall be positioned below thebottom of the obstruction in accordance with their listed distance below ceilings.




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CommitteeStatement:

Because no specific guidance is given in the standard, automatic sprinklers are being installedwith their deflectors located below obstructions in accordance with the listed dimensions for thedistance from the ceiling.

ResponseMessage:



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8.10.7.3.6

Sprinklers installed under round ducts shall be shielded from the discharge of overhead sprinklers.




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8.11.2.2.2

In any case, the maximum area of coverage of any sprinkler shall not exceed 130 ft2 (12.9 m2).




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Committee Statement: Inconcistent ( and incorrect) metric conversion.

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CommitteeStatement:

Third party testing indicates that openings of 75% are acceptable. It is a common question as tohow many small obstructions can be near each other before they are considered one obstruction tothe sprinkler discharge. As ESFR sprinklers are sensitive to obstructions, guidance is needed onacceptable distances between these small obstructions. This is thought to be a conservativeseparation value.

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8.15.1.2.8

Concealed spaces within wood joist construction and composite wood joist construction havingnoncombustible insulation filling the space from the ceiling up to the bottom edge of the joist of the roof orfloor deck, provided that in composite wood joist construction the joist channels are firestopped separated

into volumes each not exceeding 160 ft3 (4.53 m3) to the full depth of the composite wood joist withmaterial equivalent to the web construction, shall not require sprinkler protection.




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CommitteeStatement:

By using the word firestop, many AHJ's are requiring a UL assembly to seal any penetrationsthrough the joists. Since the joists are fiber board wood and rather combustible, there are not manyreadily available through penetration details. It is more logical to use the term sealed vs. firestopped.The addition of composite wood joist was intended to clarify that this section is only intended forcomposite wood joists, not all wood joists. The language previously referred to firestopping whichwas not the intent for this section. Firestopping is a defined term in many model codes and requires ahigher level of separation than what was intended. This section is simply attempting to createseparation.

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Sub-Sections] ]

Concealed spaces formed by noncombustible or limited-combustible ceilings suspended from the bottomof wood joists and composite wood joists with a maximum nominal chord width of 2 in. (50.8 mm), wherejoist spaces are full of noncombustible batt insulation with a maximum 2 in. (50.8 m) air space between theroof decking material and the top of the batt insulation shall not require sprinklers.



FR-140_Updated_A._8.15.1.2.17.docx Updated Annex Image




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Committee Statement

CommitteeStatement:

The term roof has been removed. This implies that this exception only applies to a top floor orroof condition. Updated the annex figure to clarify that it is the facing that needs to be non- orlimited-combustible.

ResponseMessage:



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With Facing


8.15.1.2.18.1

Sprinklers shall be permitted to be omitted from within combustible soffits, eaves, overhangs, anddecorative frame elements that are constructed in accordance with 8.15.1.2.18.2 through8.15.1.2.18.5 .




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CommitteeStatement:

This is text that was originally included in the 2010 version when these provisions were firstadded. The charging text to allow for sprinklers to be omitted should have been retained.

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First Revision No. 144-NFPA 13-2013 [ Section No. 8.15.1.6 [Excluding any

Sub-Sections] ]

Sprinklers used in horizontal combustible concealed spaces (with a slope not exceeding 2 in 12) withcombustible wood truss, wood joist construction, or bar joist construction having a combustible uppersurface and where the depth of the space is less than 36 in. (914 mm) from deck to deck, from deck toceiling, or with double wood joist construction with a maximum of 36 in. (914 mm) between the top of thebottom joist and the bottom of the upper joist shall be listed for such use.




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CommitteeStatement:

Guidance was added to determine the points within the concealed space for measurements.Currentsection 8.15.1.7 was added in the 2007 edition to extend the application of listed special concealedspace sprinklers to permit their use in the case where the distance is not more than 36” between thebottom and top of the joists in the double composite joist construction. At the time, the Committeeagreed to introduce this change to provide protection options for composite wood joist constructionthat had not previously been addressed.

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8.15.1.6.2

Sprinklers specifically listed to provide protection of combustible concealed spaces described in8.15.1.6 shall be permitted to be used in accordance with 8.3.1.2 throughout the area when a portionof the area exceeds a depth of 36 in. (914 mm).




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Committee Statement

CommitteeStatement:

It is not uncommon for a long space or when depths start at close to 36 inches where the allowedslope causes the depth to exceed 36 inches. The manufacturer cut-sheets indicate that the listedsprinklers cannot be used beyond 36 inches whereas it seems the intent should be that thesprinklers must be used for depths less than 36 without limiting their use when the depth alsoexceeds this value.

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8.15.1.6.1

Sprinklers specifically listed to provide protection of combustible concealed spaces described in 8.15.1.6shall be permitted to be used in accordance with 8.3.1.2 where the space is less than 12 in. (305 mm)from deck to deck or deck to ceiling .




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Committee Statement

CommitteeStatement:

The term deck to ceiling was added so that this section is congruent with the revision to 8.15.1.6via FR 144.The added reference to Section 8.3.1.2 is to close the loop by cross-referencing back tothe provision that allows for application of listed sprinklers beyond their listing for different . This isconsistent with the current text in 8.15.1.6.1.

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8.15.1.7

Sprinklers specifically listed to provide protection of combustible concealed spaces described in 8.15.1.6shall be permitted to be used in accordance with 8.3.1.2 to protect composite wood joist constructionwith a maximum of 36 in. (914 mm) from deck to deck, from deck to ceiling, or with double compositewood joist construction with a maximum of 36 in. (914 mm) between the top of the bottom joist and thebottom of the upper joist.




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Committee Statement

CommitteeStatement:

Current section 8.15.1.7 was added in the 2007 edition to extend the application of listed specialconcealed space sprinklers to permit their use in the case where the distance is not more than 36”between the bottom and top of the joists in the double composite joist construction. At the time, theCommittee agreed to introduce this change to provide protection options for composite wood joistconstruction that had not previously been addressed.

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8.15.7.2*

Sprinklers shall be permitted to be omitted where the exterior canopies, roofs, porte-cocheres, balconies,decks, and similar projections are constructed with materials that are noncombustible, limited-combustible, or fire retardant–treated wood as defined in NFPA 703, Standard for Fire Retardant-TreatedWood and Fire-Retardant Coatings for Building Material , or where the projections are constructedutilizing a noncombustible frame, limited-combustibles, or fire retardant–treated wood with an inherentlyflame-resistant fabric overlay as demonstrated by Test Method 2 in accordance with NFPA 701 ,Standard Methods of Fire Tests for Flame Propagation of Textiles and Films .




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Committee Statement

CommitteeStatement:

As currently written, fabric canopies that are attached to buildings do not meet the constructionrequirements if the sprinklers are to be omitted in these areas, therefore, it must be assumed that allexterior fabric canopies must be sprinkler protected. If the fabric has been tested in accordance withtest method 2 of NFPA 701, it has been demonstrated that flame propagation is not sustained andthat there is no degradation to the material's flame resistant properties due to anticipated exposuresand based on these findings, it is evident that these projections present very little, if any, hazard andcan therefore be added to the list of permitted sprinkler omissions.

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8.15.8.1.1*

Sprinklers Unless sprinklers are required by 8.15.8.1.2 or 8.15.8.1.3 , sprinklers shall not be required in

bathrooms that are located within dwelling units of hotels and motels , that do not exceed 55 ft2 (5.1 m2)in area, and that have walls and ceilings of noncombustible or limited-combustible materials with a15-minute thermal barrier rating, including the walls and ceilings behind any shower enclosure or tub.




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Committee Statement

CommitteeStatement:

This revision reinstates the sprinkler exception that was recently deleted in the 2013 edition of NFPA13 from Section 8.15.8.1.1. The NFPA 13 AUT-SSI Committee accepted a code proposal to delete thisapartment dwelling unit sprinkler exception that has been in its standard since the 1991 edition ofNFPA 13. The original code proposal, as well as the public comment that the AUT-SSI Committeeaccepted to delete this bathroom sprinkler exception, provided no technical fire data andsubstantiation to delete this exception for apartment bathrooms in dwelling units. In addition, thedeletion of this exception will have an adverse affect on the retrofitting of existing high-rise apartmentbuildings with sprinklers. During the 2010 NFPA 13 code process, the AUT-SSI Committee attemptedto delete this same exception, but the NMHC submitted a CAM that was approved by the membershipat the Annual Technical Meeting in Chicago that reinstated the exception. This bathroom exceptionhas been in NFPA Codes (first placed NFPA 101 and then moved to NFPA 13) for over 34 years withno adverse fire protection or life safety issues. The apartment dwelling unit sprinkler exception wasoriginal in the 1976 edition of NFPA 101, and was only removed from the NFPA 101 editions after1991 because of the informal understanding between the NFPA 101 Residential Subcommittee andNFPA 13 Committee that sprinkler contractors would rather have such an exception in NFPA 13 so itwould not be missed during the bidding, design and installation process. The NFPA Fire Data Report,“1582-Area of Origin in Reported Apartment Fires 2004-2008,” dated January 2011, that clearlyprovides fire data showing that fires in bathrooms in sprinklered apartments building are small innumber, with limited property loss, and have not caused any fire deaths. In this report for the latest firedata (2004-2008 annual averages): 1. Table 3, "Apartment fires in Which Sprinklers were Present, byArea of Origin", that include fire data for both NFPA 13 & NFPA 13R systems, bathrooms firesaccounted for only 300 (1%) fires out of a total of 18,200/year fires in such buildings, with 0 deaths outof 17 deaths/year, with 7 injuries (2%) out of 399/year, with a total direct property loss of $1 million(2%) out of $71 million/year . 2. Table 20, "Apartment Buildings of Five or More Stories in WhichSprinklers were Present, by Area of Origin", that would be only apartment buildings sprinklered inaccordance with NFPA 13 systems (NFPA 13R systems are limited to buildings up to 4 stories inheight), bathrooms fires accounted for only 80 (1%) fires out of a total of 6,070/year fires in suchbuildings, with 0 deaths out of 9 deaths/year, with 1 injury (1%) out of 129/year, with a total directproperty loss of $0 out of $11 million/year. 3. Table 22, "Apartment Buildings of Five or More Stories inWhich Sprinklers were Present and Flame Damage Spread beyond the Room of Origin, by Area ofOrigin", that would be only apartment buildings sprinklered in accordance with NFPA 13 systems(NFPA 13R systems are limited to buildings up to 4 stories in height), bathrooms fires accounted foronly 1 (1%) fires out of a total of 72/year fires in such buildings, with 0 deaths out of 2 deaths/year,with 0 injuries out of 21/year, with a total direct property loss of $0 out of $3 million/year. Based on


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NFPA fire data there is no rational reason or evidence to support the deletion of this reasonablebathroom sprinkler exception for dwelling units in apartment buildings that was in the Codes for over34 years until it was removed in the 2013 edition of NFPA 13. It is entirely reasonable based on theNFPA fire data report to reinstate this bathroom exception for such small bathrooms (less than orequal to 55 sq. ft.) in dwelling units in apartment buildings.

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8.15.11.2

Hoods or shields installed to protect important electrical equipment from sprinkler discharge shall benoncombustible.




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Committee Statement

CommitteeStatement:

The standard gives no guidance on how to install a hood or shield. If water is such a concern,then the standard should require that the electrical equipment be installed in the appropriateNEMA enclosure.

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8.15.24 Revolving Doors Enclosures.

8.15.24.1

Sprinkler protection shall not be required within revolving door enclosures.


8.15.24.2 Indoor Swimming Pools.

8.15.24.2.1

The area directly above indoor swimming pools shall not require sprinkler protection unless therequirements of 8.15.24.2.2 apply.

8.15.24.2.2

The area above indoor swimming pools equipped with moveable hard covers that allow the area to beused for athletic activities other than swimming and other water sports shall require sprinkler protection.

8.15.24.2.3

Sprinklers shall be installed in all areas adjacent to indoor swimming pools.




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Committee Statement

CommitteeStatement:

It is impractical to install sprinklers within these areas. The standard should specificallyexclude these.

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8.15.24.2 Indoor Swimming Pools.

8.15.24.2.1

The area directly above indoor swimming pools shall not require sprinkler protection unless therequirements of 8.15.24.2.2 apply.

8.15.24.2.2

The area above indoor swimming pools equipped with moveable hard covers that allow the area to beused for athletic activities other than swimming and other water sports shall require sprinkler protection.

8.15.24.2.3

Sprinklers shall be installed in all areas adjacent to indoor swimming pools.




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Committee Statement

CommitteeStatement:

Indoor swimming pools represent very low fire hazards and frequently allowed to be omitted bylocal AHJ’s. These new sections will provide guidance to support a reasonable approach and areasonable degree of protection levels.

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8.2.4 Floor Control Valve Assemblies.

8.2.4.1*

Multistory buildings exceeding two stories in height shall be provided with a floor control valve, checkvalve, main drain valve, and flow switch for isolation, control, and annunciation of water flow on eachfloor level.

8.2.4.2

The floor control valve, check valve, main drain valve, and flow switch required by 8.2.4.1 shall not berequired where sprinklers on the top level of a multistory building are supplied by piping on the floorbelow.

8.2.4.3

The floor control valve, check valve, main drain valve, and flow switch required by 8.2.4.1 shall not berequired where the total area of all floors combined does not exceed the system protection arealimitations of 8.2.1 .




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Committee Statement

CommitteeStatement:

This section was added in the 2013 edition of the standard as section 8.16.1.5 but is moredirectly associated with section 8.2 and should be relocated there for clarity and consistency

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8.16.2.4.2*

Drain connections for systems supply risers and mains shall be sized as shown in Table 8.16.2.4.2.

Table 8.16.2.4.2 Drain Size

Riser or Main Size (in.)Size of Drain Connection

(in.)

Up to 2 3⁄4 or larger

21⁄2, 3, 31⁄2 11⁄4 or larger

4 and larger 2 only or larger

For SI units, 1 in. = 25.4 mm.



A.8.16.2.4.2_FR-154.docx




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Committee Statement

CommitteeStatement:

The current text restricts the main drain to no larger than 2”. This is a practical means forperforming the forward flow test of the backflow device as required by 8.17.4.6.1 but it needs tobe allowed to be a larger diameter.

ResponseMessage:




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A.8.16.2.4.2 This is a very practical means for performing the forward flow test of the backflow device as required by 8.17.4.6.1.


8.16.4.1.4.2

Electric supervision of the heat-tracing system shall provide positive confirmation that the circuit isenergized. Heat tracing systems shall be supervised by one of the following methods:

(1) Central station, proprietary, or remote station signaling service

(2) Local signaling service that will cause a signal at a constantly attended location




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Committee Statement

Committee Statement: This change is to correlate with NFPA 14.

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8.16.6* Air Venting.


The vent shall be located near the highest point in the system to remove the majority of the air by one ofthe following methods:

(1) Manual valve, minimum 1 ⁄2 in. size

(2) Automatic air vent

(3) Other approved means


Submitter Full Name: Matthew Klaus

Organization: National Fire Protection Assoc

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Submittal Date: Wed Sep 18 14:17:14 EDT 2013

Committee Statement

CommitteeStatement:


ResponseMessage:


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First Revision No. 152-NFPA 13-2013 [ New Section after 8.17 ]

8.18 Electrical Bonding and Grounding.

8.18.1*

Fire sprinkler systems shall be permitted to be used for bonding in accordance with NFPA 70 .

8.18.2

Fire sprinkler systems shall not be used for grounding of electrical systems.



FR_152.docx ANNEX




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Committee Statement

CommitteeStatement:

Currently there is some language in Chapter 10 in regards to bonding of underground pipe.Language that applies to the overhead piping of the system needs to be included in thestandard.

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A.8.18.1 While the use of the sprinkler system piping as the grounding electrode for the building is prohibited, NFPA 70 requires that all metallic piping systems be bonded to disperse stray electrical currents. Therefore, the sprinkler system piping should be bonded to other metallic systems.


8.17.2.3* Size.

The size of the pipe for the fire department connection shall be in accordance with one of the following:

(1) Pipe size shall be a minimum of 4 in. (100 mm) for fire engine connections.

(2) Pipe size shall be a minimum of 6 in. (150 mm) for fire boat connections.

(3) For hydraulically calculated systems, the fire department connection pipe size shall be permitted tobe less than 4 in. (100 mm) and no , but not less than the size of system riser, where serving onesystem riser largest riser being served by that connection .




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CommitteeStatement:

There is no reason to limit the FDC pipe to the size of the riser for single systems as weassume one fire (see 1.1.2)

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8.17.2.6.1


The automatic drain valve shall be installed in a location that permits inspection and testing as requiredby NFPA 25 .




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Committee Statement

CommitteeStatement:

The text for this revision was copied from 5.9.4.2 of NFPA 24-2013. The same instruction foraccessibility and freeze protection for an automatic drain valve should also be provided in NFPA13.

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8.17.2.6* Drainage.

The piping between the check valve and the outside hose coupling shall be equipped with an approvedautomatic drip drain valve in areas subject to freezing.

8.17.2.6.1


The automatic drain valve shall be installed in a location that permits inspection and testing as requiredby NFPA 25 .




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Committee Statement

Committee Statement: Language was revised to be congruent with NFPA 24 and FR-157.

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8.16.2.4.6* Main Drain Test Connections.

8.16.2.4.6.1

Main drain test connections shall be provided at locations that will permit flow tests of water suppliesand connections.

8.16.2.4.6.2

Main drain test connections shall be installed that the valve can be opened wide for a sufficient time toassure a proper test without causing water damage.

8.16.2.4.6.3

Main drain connections shall be sized in accordance with 8.12.4.2 .




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CommitteeStatement:

Having these reqirements in two places and referring each to the other is confusing for theuser of NFPA 13.

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8.17.4.5.1* Backflow Prevention Valves.

Means shall be provided downstream of all backflow prevention valves for forward flow tests at aminimum flow rate of the system demand including hose allowance where applicable .



FR_160.docx Annex




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CommitteeStatement:

System demand refers to flow rate and pressure. This test is only concerned with testing at theproper flow rate. This revised terminology is consistent with NFPA 25.

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A.8.17.4.6.1 System demand refers to flow rate and pressure. This test is only concerned with testing at the proper flow rate. The full flow test of the backflow prevention valve can be performed with a test header or other connection downstream of the valve. A bypass around the check valve in the fire department connector line with a control valve in the normally closed position can be an acceptable arrangement. When flow to a visible drain cannot be accomplished, closed loop flow can be acceptable if a flowmeter or site glass is incorporated into the system to ensure flow. When a backflow prevention device is retroactively installed on a pipe schedule system, the revised hydraulic calculation still follows the pipe schedule method of 11.2.2 with the inclusion of friction loss for the device.


9.1.1.5.2*

Mild steel Mild steel Hanger rods and hangers formed from mild steel rods shall be permitted to be notlisted.




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CommitteeStatement:

Section 9.1.1.5.2 is editorially clarified to indicate that the section is intended to apply to bothhanger rods and hangers that are formed from mild steel rod. Additional modifications were madeto PI 44 to join the two proposed sections into a single requirement.

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9.1.1.6 Component Material.

9.1.1.6.1

Unless permitted by 9.1.1.6.2 or 9.1.1.6.4 9.1.1.6.3 , hangers and their components shall be ferrous.

9.1.1.6.2

Nonferrous components that have been proven by fire tests to be adequate for the hazard application, thatare listed for this purpose, and that are in compliance with the other requirements of this section shall beacceptable.

9.1.1.6.3*


Ferrous hanger rods shall be fabricated from steel that meets the requirements of ASTM A307,Standard Specification for Carbon Steel Bolts and Studs , 60 000 psi tensile strength, Grade A or B, orthe material, strength and fit requirements of other equivalent standards.

9.1.1.6.4

Holes through solid structural members shall be permitted to serve as hangers for the support of systempiping, provided such holes are permitted by applicable building codes and the spacing and supportprovisions for hangers of this standard are satisfied.




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CommitteeStatement:

A new Section 9.1.1.6.3 was added since there are no requirements in the standard for the hangerrod. The hanger rod is a critical component in maintaining the integrity of the sprinkler system andminimum requirements for the rod need to be specified. The hanger rod is assumed by designersand contractors to have characteristics that will provide the anticipated performance after installation.The addition of the requirements in this section should provide the guidance for the anticipatedperformance.

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9.1.1.7.1


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For trapeze hangers, the minimum size of steel angle or pipe span between purlins or joists structuralmembers shall be such that the section modulus required in Table 9.1.1.7.1(a) does not exceed theavailable section modulus of the trapeze member from Table 9.1.1.7.1(b).

Table 9.1.1.7.1(a) Section Modulus Required for Trapeze Members (in.3)

bold"Nominal Diameter of Pipe Being Supported — Schedule 10 Steel

Span (ft) 1 1.25 1.5 2 2.5 3 3.5 4 5 6 8 10

1.5 0.08 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.15 0.18 0.26 0.34

2.0 0.11 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.20 0.24 0.34 0.45

2.5 0.14 0.14 0.15 0.16 0.18 0.21 0.23 0.25 0.30 0.36 0.50 0.69

3.0 0.16 0.17 0.18 0.19 0.20 0.22 0.24 0.26 0.31 0.36 0.51 0.67

3.5 0.19 0.20 0.21 0.22 0.24 0.26 0.28 0.30 0.36 0.42 0.60 0.78

4.0 0.22 0.22 0.24 0.25 0.27 0.30 0.32 0.34 0.41 0.48 0.68 0.89

4.5 0.24 0.25 0.27 0.28 0.30 0.33 0.36 0.38 0.46 0.54 0.77 1.01

5.0 0.27 0.28 0.30 0.31 0.34 0.37 0.40 0.43 0.51 0.60 0.85 1.12

5.5 0.30 0.31 0.33 0.34 0.37 0.41 0.44 0.47 0.56 0.66 0.94 1.23

6.0 0.33 0.34 0.35 0.38 0.41 0.44 0.48 0.51 0.61 0.71 1.02 1.34

6.5 0.35 0.36 0.38 0.41 0.44 0.48 0.52 0.56 0.66 0.77 1.11 1.45

7.0 0.38 0.39 0.41 0.44 0.47 0.52 0.56 0.60 0.71 0.83 1.19 1.56

7.5 0.41 0.42 0.44 0.47 0.51 0.55 0.60 0.64 0.76 0.89 1.28 1.68

8.0 0.43 0.45 0.47 0.50 0.54 0.59 0.63 0.68 0.82 0.95 1.36 1.79

8.5 0.46 0.48 0.50 0.53 0.58 0.63 0.67 0.73 0.87 1.01 1.45 1.90

9.0 0.49 0.50 0.53 0.56 0.61 0.66 0.71 0.77 0.92 1.07 1.53 2.01

9.5 0.52 0.53 0.56 0.60 0.64 0.70 0.75 0.81 0.97 1.13 1.62 2.12

10.0 0.54 0.56 0.59 0.63 0.68 0.74 0.79 0.85 1.02 1.19 1.70 2.23

10.5 0.57 0.59 0.62 0.66 0.71 0.78 0.83 0.90 1.07 1.25 1.79 2.35

11.0 0.60 0.62 0.65 0.69 0.74 0.81 0.87 0.94 1.12 1.31 1.87 2.46

11.5 0.63 0.64 0.68 0.72 0.78 0.85 0.91 0.98 1.17 1.37 1.96 2.57

12.0 0.65 0.67 0.71 0.75 0.81 0.89 0.95 1.02 1.22 1.43 2.04 2.68

12.5 0.68 0.70 0.74 0.78 0.85 0.92 0.99 1.07 1.27 1.49 2.13 2.79

13.0 0.71 0.73 0.77 0.81 0.88 0.96 1.03 1.11 1.33 1.55 2.21 2.90

13.5 0.73 0.76 0.80 0.85 0.91 1.00 1.07 1.15 1.38 1.61 2.30 3.02

14.0 0.76 0.78 0.83 0.88 0.95 1.03 1.11 1.20 1.43 1.67 2.38 3.13

14.5 0.79 0.81 0.86 0.91 0.98 1.07 1.15 1.24 1.48 1.73 2.47 3.24

15.0 0.82 0.84 0.89 0.94 1.02 1.11 1.19 1.28 1.53 1.79 2.56 3.35

15.5 0.84 0.87 0.92 0.97 1.05 1.14 1.23 1.32 1.58 1.85 2.64 3.46

16.0 0.87 0.90 0.95 1.00 1.08 1.18 1.27 1.37 1.63 1.91 2.73 3.58

Nominal Diameter of Pipe Being Supported — Schedule 40 Steel

bold" Span(ft) bold"1 bold"1.25 bold"1.5 bold"2 bold"2.5 bold"3 bold"3.5 bold"4 bold"5 bold"6 bold"8 bold"10

1.5 0.08 0.09 0.09 0.1 0.11 0.12 0.14 0.15 0.18 0.22 0.30 0.41

2.0 0.11 0.11 0.12 0.13 0.15 0.16 0.18 0.20 0.24 0.29 0.40 0.55

2.5 0.14 0.14 0.15 0.16 0.17 0.18 0.20 0.21 0.25 0.30 0.43 0.56

3.0 0.16 0.17 0.18 0.20 0.22 0.25 0.27 0.30 0.36 0.43 0.60 0.82

3.5 0.19 0.20 0.21 0.23 0.26 0.29 0.32 0.35 0.42 0.51 0.70 0.96

4.0 0.22 0.23 0.24 0.26 0.29 0.33 0.36 0.40 0.48 0.58 0.80 1.10

4.5 0.25 0.26 0.27 0.29 0.33 0.37 0.41 0.45 0.54 0.65 0.90 1.23


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bold"Nominal Diameter of Pipe Being Supported — Schedule 10 Steel


Note: The table is based on a maximum bending stress of 15 ksi and a midspan concentrated load from15 ft (4.6 m) of water-filled pipe, plus 250 lb (114 kg).

Table 9.1.1.7.1(b) Available Section Modulus of Common Trapeze Hangers (in. 3 )

Pipe

Modulus (in. 3 ) Angles (in.) Modulus (in. 3 )in. mm

Schedule 10

1 25 0.12 1 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.10

1 1 ⁄4 32 0.19 2 × 2 × 1 ⁄8 0.13

1 1 ⁄2 40 0.26 2 × 1 1 ⁄2 × 3 ⁄16 0.18

2 50 0.42 2 × 2 × 3 ⁄16 0.19

2 1 ⁄2 65 0.69 2 × 2 × 1 ⁄4 0.25

3 80 1.04 2 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.28

3 1 ⁄2 90 1.38 2 1 ⁄2 × 2 × 3 ⁄16 0.29

4 100 1.76 2 × 2 × 5 ⁄16 0.30

5 125 3.03 2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄16 0.30

6 150 4.35 2 × 2 × 3 ⁄8 0.35

2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.39

3 × 2 × 3 ⁄16 0.41

Schedule 40

1 25 0.13 3 × 2 1 ⁄2 × 3 ⁄16 0.43

1 1 ⁄4 32 0.23 3 × 3 × 3 ⁄16 0.44

1 1 ⁄2 40 0.33 2 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.48

2 50 0.56 3 × 2 × 1 ⁄4 0.54

2 1 ⁄2 65 1.06 2 1 ⁄2 × 2 × 3 ⁄8 0.55

3 80 1.72 2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄8 0.57

3 1 ⁄2 90 2.39 3 × 3 × 1 ⁄4 0.58

4 100 3.21 3 × 3 × 5 ⁄16 0.71

5 125 5.45 2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄2 0.72

6 150 8.50 3 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.75

3 × 2 1 ⁄2 × 3 ⁄8 0.81

3 × 3 × 3 ⁄8 0.83

3 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.93

3 × 3 × 7 ⁄16 0.95

4 × 4 × 1 ⁄4 1.05

3 × 3 × 1 ⁄2 1.07

4 × 3 × 5 ⁄16 1.23

4 × 4 × 5 ⁄16 1.29

4 × 3 × 3 ⁄8 1.46

4 ×4 × 3 ⁄8 1.52

5 × 3 1 ⁄2 × 5 ⁄16 1.94

4 × 4 × 1 ⁄2 1.97

4 × 4 × 5 ⁄8 2.40

4 × 4 × 3 ⁄4 2.81


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Pipe

Modulus (in. 3 ) Angles (in.) Modulus (in. 3 )in. mm

6 × 4 × 3 ⁄8 3.32

6 × 4 × 1 ⁄2 4.33

6 × 4 × 3 ⁄4 6.25

6 × 6 × 1 8.57


Table 9.1.1.7.1(b) Available Section Modulus of Common Trapeze Hangers (in. 3 )

Pipe

Modulus (in. 3 )in. mm

Schedule 10

1 25 0.12

1 1 ⁄4 32 0.19

1 1 ⁄2 40 0.26

2 50 0.42

2 1 ⁄2 65 0.69

3 80 1.04

3 1 ⁄2 90 1.38

4 100 1.76

5 125 3.03

6 150 4.35

Schedule 40

1 25 0.13

1 1 ⁄4 32 0.23

1 1 ⁄2 40 0.33

2 50 0.56

2 1 ⁄2 65 1.06

3 80 1.72

3 1 ⁄2 90 2.39

4 100 3.21

5 125 5.45

6 150 8.50

Angles (in.) Modulus (in. 3 )

1 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.10

2 × 2 × 1 ⁄8 0.13

2 × 1 1 ⁄2 × 3 ⁄16 0.18

2 × 2 × 3 ⁄16 0.19

2 × 2 × 1 ⁄4 0.25

2 1 ⁄2 × 1 1 ⁄2 × 3 ⁄16 0.28

2 1 ⁄2 × 2 × 3 ⁄16 0.29

2 × 2 × 5 ⁄16 0.30

2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄16 0.30

2 × 2 × 3 ⁄8 0.35

2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.39


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Pipe

Modulus (in. 3 )in. mm

3 × 2 × 3 ⁄16 0.41

3 × 2 1 ⁄2 × 3 ⁄16 0.43

3 × 3 × 3 ⁄16 0.44

2 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.48

3 × 2 × 1 ⁄4 0.54

2 1 ⁄2 × 2 × 3 ⁄8 0.55

2 1 ⁄2 × 2 1 ⁄2 × 3 ⁄8 0.57

3 × 3 × 1 ⁄4 0.58

3 × 3 × 5 ⁄16 0.71

2 1 ⁄2 × 2 1 ⁄2 × 1 ⁄2 0.72

3 1 ⁄2 × 2 1 ⁄2 × 1 ⁄4 0.75

3 × 2 1 ⁄2 × 3 ⁄8 0.81

3 × 3 × 3 ⁄8 0.83

3 1 ⁄2 × 2 1 ⁄2 × 5 ⁄16 0.93

3 × 3 × 7 ⁄16 0.95

4 × 4 × 1 ⁄4 1.05

3 × 3 × 1 ⁄2 1.07

4 × 3 × 5 ⁄16 1.23

4 × 4 × 5 ⁄16 1.29

4 × 3 × 3 ⁄8 1.46

4 ×4 × 3 ⁄8 1.52

5 × 3 1 ⁄2 × 5 ⁄16 1.94

4 × 4 × 1 ⁄2 1.97

4 × 4 × 5 ⁄8 2.40

4 × 4 × 3 ⁄4 2.81

6 × 4 × 3 ⁄8 3.32

6 × 4 × 1 ⁄2 4.33

6 × 4 × 3 ⁄4 6.25

6 × 6 × 1 8.57




Add_Table_9.1.1.7.1_b_Format.docx Table format for 9.1.1.7.1(b)




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Committee Statement

CommitteeStatement:

Section 9.1.1.7.1 is being modified in 4 different ways: 1)Adding inches into the header for the twotables. 2)Reinstating the second footnote that addresses the development of the table. 3)SI units aremissing on footnote for (a) 4)The term purlins and joists has been replaced by "structural members"as this section was never intended to limit the application of this section to only joists and purlins.5)Restructure table (b) to a 2 column format instead of 4 columns. The columns are misleading andnot intended to be read left to right, row-by-row This FR takes into account the modifications in allthree PI (224, 225, and 434)

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9.1.1.7.7

Holes for bolts or rods shall not exceed 1⁄16 in. (1.6 mm) greater than the diameter of the bolt or rod .




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The referenced term bolt also applies to all thread rod used commonly to support firesprinkler piping.

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9.1.1.7.9

Where angles are used for trapeze hangars, slotted holes shall meet all of the following:

(1) The length of each slotted hole shall not exceed 3 in.

(2) The width of the slotted hole shall not exceed 1 ⁄16 in. greater than the bolt or rod diameter.

(3) The minimum distance between slotted holes shall be 3 in. edge to edge.

(4) The minimum distance from the end of the angle to the edge of the slotted hole shall be 3 in.

(5) The number of slots shall be limited to three per section of angle.

(6) The washer required by 9.1.1.7.8 shall have a minimum thickness of one-half the thickness ofthe angle.

(7) Multiple washers shall not be used.

(8) Washer and nuts required by 9.1.1.7.8 shall be provided on both the top and bottom of theangle.




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This new language provides guidance for slotted holes used for angles with trapeze hangers.Modifications made to other sections of the standard eliminated slots from being addressed inseveral portions of Ch 9, making this section necessary for slots to continue to be used.

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9.1.1.7.8

Bolts and rods shall be provided with a flat washers and nuts .




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Committee Statement: This section was revised to correlate with the changes made to 9.1.1.7.7 in FR-7.

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9.1.3.10 Minimum Bolt or Rod Size for Concrete.

9.1.3.10.1

The size of a bolt or rod used with a hanger and installed through concrete shall not be less thanspecified in Table 9.1.3.10.1.

Table 9.1.3.10.1 Minimum Bolt or Rod Size for Concrete

Pipe Size Size of Bolt or Rod

in. mm in. mm

Up to and including 4 100 3⁄8 10

5 125 1⁄2 13

6 150

8 200

10 250 5⁄8 15

12 300 3⁄4 20

9.1.3.10.2


9.1.3.10.3





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CommitteeStatement:

The referenced term bolt also applies to all thread rod used commonly to support fire sprinklerpiping especially through thick beams. Additional modifications to this section were made to addthe term "or rod" for consistency with the revision created by PI 525.

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9.1.4.5 Minimum Bolt or Rod Size for Steel.

9.1.4.5.1

The size of a bolt or rod used with a hanger and installed through steel shall not be less than specified inTable 9.1.4.5.1.

Table 9.1.4.5.1 Minimum Bolt or Rod Size for Steel

Pipe Size Size of Bolt or Rod

in. mm in. mm

Up to and including 4 100 3⁄8 10

5 125 1⁄2 12

6 150

8 200

10 250 5⁄8 15

12 300 3⁄4 20

9.1.4.5.2


9.1.4.5.3





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CommitteeStatement:

The referenced term bolt also applies to all thread rod used commonly to support fire sprinklerpiping. Additional modifications were made to the section for correlation with the revision madethrough PI 526.

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9.1.5.3 Bolt Bolts, Rods, or Lag Screws .

9.1.5.3.1

Unless the requirements of 9.1.5.3.2 are met, the size of bolt, rod, or lag screw used with a hanger andinstalled on the side of the beam shall not be less than specified in Table 9.1.5.3.1.

Table 9.1.5.3.1 Minimum Bolt, Rod, or Lag Screw Sizes for Side of Beam Installation

Pipe SizeSize of Bolt, Rod or Lag

ScrewLength of Lag Screw Used with Wood

Beams

in. mm in. mm in. mm

Up to and including2

50 3⁄8 10 21⁄2 64

21⁄2 to 6 (inclusive)65 to150

1⁄2 12 3 76

8 200 5⁄8 15 3 76

9.1.5.3.2

Where the thickness of beams or joists does not permit the use of screws 21⁄2 in. (64 mm) long, screws 2in. (50 mm) long shall be permitted with hangers spaced not over 10 ft (3 m) apart.

9.1.5.3.3

All holes for lag screws shall be pre-drilled 1⁄8 in. (3.2 mm) less in diameter than the maximum rootdiameter of the lag screw thread.

9.1.5.3.4


9.1.5.3.5





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CommitteeStatement:

The referenced term bolt also applies to all thread rod used commonly to support fire sprinklerpiping especially through thick beams. Additional modifications were made to the section forcorrelation with the revision made by PI 527.

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9.1.5.6.1

Screws in the side of a timber or joist shall be not less than 21⁄2 in. (64 mm) from the lower edge wheresupporting branch lines pipe is up to and including nominal 2 1 ⁄2 in. and not less than 3 in. (76 mm)where supporting main lines. pipe is greater than nominal 2 1 ⁄2 in.




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CommitteeStatement:

These requirements should be on the loads the screw is carrying and not the type of pipe, thereare buildings with small mains and others with large branch lines,the diameter is a better gauge forthis requirement. Additional editorial corrections were made changing the word "then" to "than" andadd the term "nominal" in front of pipe size.

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9.1.5.7.2

The minimum plank thickness and the minimum width of the lower face of beams or joists in which coachscrew rods are used shall be not less than that specified in Table 9.1.5.7.2 and shown in Figure9.1.5.7.2 .

Table 9.1.5.7.2 Minimum Plank Thicknesses and Beam or Joist Widths

Pipe Size Nominal Plank Thickness Nominal Width of Beam or Joist Face

in. mm in. mm in. mm

Up to and including 2 50 3 76 2 50

21⁄2 65 4 102 2 50

3 80

31⁄2 90

4 100 4 102 3 76

Figure 9.1.5.7.2 Dimensions for Structural Members with Coach Screw Rods.



FR-9.tif coach screw rod




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A figure is extremely helpful in describing which dimension of the beam is the nominal width of thejoist face and which is the plank thickness. The arrow should be labeled "Coach Screw Rod" and


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should be centered on the bottom of the structural member.

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9.2.1.3.1

Unless the requirements of 9.2.1.3.3 apply, sprinkler Sprinkler piping shall be substantially supportedfrom the building structure, which must support the added load of the water-filled pipe plus a minimum of250 lb (114 kg) applied at the point of hanging, except where permitted by 9.2.1.1.2, 9.2.1.3.3, and9.2.1.4.1.




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The preface "Unless the requirements of 9.2.1.3.1 apply" is not necessary as this provision isstated at the end of the section.

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9.2.3.4.4.4

The Unless flexible sprinkler hose fittings in accordance with 9.2.1.3.3.1 are used, the hanger closest tothe sprinkler shall be of a type that prevents upward movement of the pipe.




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When flexible hoses are installed in accordance with the listing, the sprinkler is fixed to theceiling, and no additional means are necessary to prevent upward thrust. The TC revised thelanguage to provide a link to the section on flexible hose fittings.

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9.2.3.5.2.3

Where the armover exceeds the maximum unspupported length of 9.2.3.5.2.1 , a hanger shall beinstalled so that the distance from the end sprinkler or drop nipple to the hanger is not greater than 12in. (305 mm) for steel or 6 in. (150 mm) for copper, or the pipe shall be extended beyond the endsprinkler and shall be supported by an additional hanger.




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CommitteeStatement:

For a armover exceeding 12 inches in length, section 9.2.3.5.2.1 requires a hanger, but it does notrequire the hanger to be within 12 inches of the end. Without this new section, the standard allowsunsupported armovers in excess of 12 inches. The additional information provides another optionfor properly supporting the armover which is currently permitted for unsupported lengths ofbranchlines.

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9.2.3.5.2.2

The Unless flexible sprinkler hose fittings in accordance with 9.2.1.3.3.1 are used, the hanger closest tothe sprinkler shall be of a type that prevents upward movement of the pipe.




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CommitteeStatement:

When flexible hoses are installed in accordance with the Listing, the sprinkler is fixed to theceiling, and no additional means are necessary to prevent upward thrust. This section wasmodified to be consistent with the TC action on FR 11.

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9.2.4.1

Unless any of the requirements of 9.2.4.2, 9.2.4.3 , 9.2.4.4 , 9.2.4.5 , or through 9.2.4.6 are met,hangers for mains shall be in accordance with 9.2.2, between each branch line, or on each section ofpipe, whichever is the lesser dimension.




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The submitters intent was not achieved based on the proposed modification because it wouldrequire all 4 requirements to be met. The revisions clarify that only one of the requirements needsto be complied with.

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9.2.6* Pipe Stands.

9.2.6.1 General.

Pipe stands shall be sized to support a minimum of five times the weight of the water-filled pipe plus 250lb (114 kg).

9.2.6.1.1

Where pipe stands are used to support system piping, the requirements of 9.2.6 shall apply unless therequirements of 9.2.6.1.2 are met.

9.2.6.1.2

Pipe stands certified by a registered professional engineer to include all of the following shall be anacceptable alternative to the requirements of 9.2.6 :

(1) Pipe stands shall be designed to support five times the weight of water-filled pipe plus 250 lb (114kg) at each point of piping support.

(2) These points of support shall be adequate to support the system.

(3) The spacing between pipe stands shall not exceed the value given for the type of pipe as indicatedin Table 9.2.2.1(a) or Table 9.2.2.1(b) .

(4) Pipe stand components shall be ferrous.

(5) Detailed calculations shall be submitted, when required by the reviewing authority, showingstresses developed in the pipe stand, the system piping and fittings, and safety factors allowed.

9.2.6.1.3

Where water-based fire protection systems are required to be protected against damage fromearthquakes, pipe stands shall also meet the requirements of 9.3.8 .

9.2.6.2 Component Material.

9.2.6.2.1

Pipe stands and their components shall be ferrous unless permitted by 9.2.6.2.2 .

9.2.6.2.2

Nonferrous components that have been proven by fire tests to be adequate for the hazard applicationand that are in compliance with the other requirements of this section shall be acceptable.

9.2.6.3 Sizing.

9.2.6.3.1*


The maximum heights for pipe stands shall be in accordance with Table 9.2.6.3.1 .

Table 9.2.6.3.1 Maximum Pipe Stand Heights

System Pipe Diameter Pipe Stand Diameter

1 1 ⁄2 in. 2 in. 2 1 ⁄2 in. 3 in. 4 in.

1 1 ⁄2 in. 10 ft 14 ft 18 ft 28 ft 30 ft

2 in. 8 ft 12 ft 16 ft 26 ft 30 ft

2 1 ⁄2 in. 6 ft 10 ft 14 ft 24 ft 30 ft

3 in. — 8 ft 12 ft 22 ft 30 ft

>3 in. up to and including 8 in. — — — — 10 ft


9.2.6.3.2

The distance between pipe stands shall not exceed the values in Table 9.2.2.1(a) or Table 9.2.2.1(b) .

9.2.6.4 Pipe Stand Base.


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9.2.6.4.1

The pipe stand base shall be secured by an approved method.

9.2.6.4.2

Pipe stands shall be anchored to a concrete pier or footing with either expansion shields, bolts forconcrete, or cast-in-place J hooks.

9.2.6.5 Attaching to System Piping.

9.2.6.5.1

Piping shall be attached to the pipe stand with U-bolts or equivalent attachment.

9.2.6.5.2

Where a horizontal bracket is used to attach the system piping to the pipe stand, it shall not be morethan 1 ft (0.3 m).

9.2.6.6 Thrust.

9.2.6.6.1*


System piping shall be supported and restrained to restrict movement due to sprinkler/nozzle reactionand water surges.

9.2.6.6.2*


Where thrust forces are anticipated to be high, a pipe ring shall secure the system piping to the pipestand.

9.2.6.7 Exterior Applications.

Pipe stands shall be constructed of Schedule 40 threaded pipe, malleable iron flange base, and shallhave a threaded cap top.

9.2.6.2

The pipe stand base shall be secured by an approved method.

9.2.6.3

Where pipe stands are utilized, they shall be approved.



Pipe_Stand_Table_-_13_-_2016_edition.docx Table 9.2.6.3.1




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Committee Statement

CommitteeStatement:

Pipe stand requirements should be specified as part of the other support requirements forwater-based fire protection systems. The text for the first revision has been adapted from existingcriteria in NFPA 15 as well as efforts from a task group on this subject. The following conceptsincorporated are: an alternate requirement for professional engineers, material options for the pipestand, addressing the slenderness ratio of pipe in a column, addressing thrust from system filling ordry applications, addressing the use of pipe saddles, interior versus exterior applications, addressingpipe stands when in areas subject to seismic requirements. Other standards and model codesreference NFPA 13 for requirements on hanging, supporting and bracing water based fire protectionequipment. The Committee and task group recognize that additional information will be needed at the


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second revision. Items anticipated include base plate information, looped piping, and figures forclearer explanations.

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Table 9.2.6.3.1 Maximum Pipe Stand Heights System Pipe

Diameter Pipe Stand Diameter

1 ½ in. 2 in. 2 ½ in. 3 in. 4 in. 1 ½ in. 10 ft 14 ft 18 ft 28 ft 30 ft

2 in. 8 ft 12 ft 16 ft 26 ft 30 ft 2 ½ in. 6 ft 10 ft 14 ft 24 ft 30 ft 3 in. ---- 8 ft 12 ft 22 ft 30 ft

>3 in. up to and including 8 in.

---- ---- ---- ---- 10 ft



9.3.4.2

Unless any of the requirements of 9.3.4.3 through 9.3.4.7or 9.3.4.10 are met, where pipe passesthrough holes in platforms, foundations, walls, or floors, the holes shall be sized such that the diameter ofthe holes is nominally 2 in. (50 mm) larger than the pipe for pipe 1 in. (25 mm) nominal to 31⁄2 in. (90 mm)nominal and 4 in. (100 mm) larger than the pipe for pipe 4 in. (100 mm) nominal and larger.




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Section 9.3.4.10 was added to the 2013 edition of NFPA 13 but was not added to section9.3.4.2, which allows exceptions to the 2 in. clearance requirement.

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9.3.4.5

No clearance shall be required if flexible couplings are located within 1 ft (305 mm) of each side of a wall,floor, platform, or foundation. or if the requirements of 9.3.2.3.1 (2) are met.




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9.3.4.5 says that flexible couplings have to be within 1 ft (305 mm) of each side of a floor, platform,or foundation to omit the clearance hole. 9.3.2.3.1 in no. 2 says within 24 in. below the floor inmultistory buildings. As such, if a flexible coupling is located more than 12 in. and less than 24 in.below a floor, a clearance hole is required by 9.3.4.5. Increasing the coupling distance to within 24 in.below the floor, platform, or foundation in 9.3.4.5 will conform with 9.3.2.3.1(2).Rather than reprintingthe language of 9.3.2.3.1(2), the TC added a reference to this section.

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First Revision No. 45-NFPA 13-2013 [ Sections 9.3.4.9, 9.3.4.10 ]

9.3.4.9

Clearance from The installed horizontal and upward vertical clearance between horizontal sprinklerpiping and structural members not penetrated or used, collectively or independently, to support the pipingshall be at least 2 in. (50 mm).

9.3.4.10*


No clearance shall be required where piping is supported by holes through structural members aspermitted by 9.1.1.6.3 . The installed horizontal and upward vertical clearance between horizontalsprinkler piping and equipment attached to the building structure or other systems’ piping shall be at least2 in. (50 mm).




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CommitteeStatement:

Section 9.3.4.9 and 9.3.4.10 were revised to improve clarity on clearance requirement in order toavoid impact damage and potential leakage during a seismic event. Section 9.3.4.11 and subsectionwere added to provide additional specific clearance requirement for sprinkler piping and sprinklers inorder to avoid impact damage and potential leakage during a seismic event. Flexible sprinkler hosefittings are inherently impact resistant and therefore do not need the additional clearancerequirement. Section 9.3.4.12 and 9.3.4.13 were added to clarify the previous edition 9.3.4.10 whichwas vague and difficult to interpret.

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9.3.5.1.4.1

When a shared support structure is used to support gravity and seismic loads, the structure shall bedesigned to support these loads for all pipe and distribution systems on the structure using either9.3.5.9.5 9.3.5.9.3 or 9.3.5.9.6 9.3.5.9.4 with an importance factor, Ip, of 1.5 being applied to all of thedistribution systems.




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Committee Statement: Editorial correction to reference.

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9.3.5.2.3

The listed loads shall be reduced as shown in Table 9.3.5.2.3 for installations where the brace is lessthan 90 degrees from vertical.

Table 9.3.5.2.3 Allowable Listed Horizontal Load on Brace Assemblies Based on Weakest Componentof Brace Assembly Adjustment

Brace Angle Degrees

from VerticalAllowable Horizontal Load

30 to 44 Listed load rating divided by 2.000



90 Listed load rating




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CommitteeStatement:

The revision to this section went beyond simply looking at adding the word listed, however theconcept of adding clarity to his section is the same. Many agencies already address themodifications in their data tables, therefore it is important that people aren't taking the reductionsmultiple times. The table title was also modified to more clearly address the scope of the table.

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Sub-Sections] ]



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Lateral sway bracing shall be in accordance with either Table 9.3.5.5.2(a), (b) Table 9.3.5.5.2(b) ,(c) Table 9.3.5.5.2(c) , Table 9.3.5.5.2(d) , (d), or (e) Table 9.3.5.5.2(e) , or Table 9.3.5.5.2(f) , or9.3.5.5.3, based on the piping material of the sprinkler system.

Table 9.3.5.5.2(a) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 30 ksi) Schedule 10 Steel Pipe

Pipe (in.)Lateral Sway Brace Spacing (ft)a

20b 25b 30c 35c 40d

1 111 89 73 63 52

11⁄4 176 141 116 99 83

11⁄2 241 193 158 136 114

2 390 312 256 219 183

21⁄2 641 513 420 360 301

3 966 773 633 543 454

31⁄2 1281 1025 840 720 603

4 1634 1307 1071 918 769

5 2814 2251 1844 1581 1324

6 and largere 4039 3231 2647 2269 1900

Note: ASTM A 106 Grade B or ASTM A 53 Grade B has an Fy = 35 ksi. An Fy = 30 ksi was used also as a

conservative value to account for differences in material properties as well as other operational stresses.

a The tables for the maximum load, Fpw, in zone of influence are based on specific configurations of

mains and branch lines.

b Assumes branch lines at center of pipe span and near each support.

c Assumes branch lines at third-points of pipe span and near each support.

d Assumes branch lines at quarter-points of pipe span and near each support.

e Larger diameter pipe can be used when justified by engineering analysis.

Table 9.3.5.5.2(b) Maximum Load (Fpw) in Zone of Influence (lb), (Fy= 30 ksi) Schedule 40 Steel Pipe


20b 25b 30c 35c 40d

1 121 97 79 68 57

11⁄4 214 171 140 120 100

11⁄2 306 245 201 172 144

2 520 416 341 292 245

21⁄2 984 787 645 553 463

3 1597 1278 1047 897 751

31⁄2 2219 1775 1455 1247 1044

4 2981 2385 1954 1675 1402

5 5061 4049 3317 2843 2381

6 and largere 7893 6314 5173 4434 3713






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Table 9.3.5.5.2(c) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 30 ksi) Schedule 5 Steel Pipe


20b 25b 30c 35c 40d

1 71 56 46 40 33

11⁄4 116 93 76 65 55

11⁄2 154 124 101 87 73

2 246 197 161 138 116

21⁄2 459 367 301 258 216

3 691 552 453 388 325

31⁄2 910 728 597 511 428

4e 1160 928 760 652 546









Table 9.3.5.5.2(d) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 8 ksi) CPVC Pipe


20b 25b 30c 35c 40d

3⁄4 15 12 10 8 7

1 28 22 18 15 13

11⁄4 56 45 37 30 26

11⁄2 83 67 55 45 39

2 161 129 105 87 76

21⁄2 286 229 188 154 135

3 516 413 338 278 243






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Table 9.3.5.5.2(e) Maximum Load (Fpw) in Zone of Influence (lb), (Fy = 30 ksi) Type M Copper Tube (withSoldered Joints)


20b 25b 30c 35c 40d

3⁄4 16 13 10 9 8

1 29 24 19 16 14

11⁄4 53 42 35 28 25

11⁄2 86 69 56 46 41

2e 180 144 118 97 85







Table 9.3.5.5.2(f) Maximum Load ( F pw ) in Zone of Influence (lbs), ( F y = 9ksi) Type M Copper Tube

(with Brazed Joints)

Lateral Sway Spacing (ft) a

Diameter 20 a 25 b 30 c 35 c 40 c

3 ⁄4 12 10 8 7 6

1 23 18 15 13 11

1 1 ⁄4 41 33 27 23 19

1 1 ⁄2 67 53 44 38 31

2 e 140 112 92 78 66

a The tables for the maximum load F pw , in zone of influence are bases on specific configurations ofmains and branch lines.







Add_Table_9_3_5_5_2_f.docx




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Street Address:

City:

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Zip:

Submittal Date: Fri Oct 18 10:41:55 EDT 2013

Committee Statement

CommitteeStatement:

New Table 9.3.5.5.2(f) (see attached) adds ZOI tables for copper piping with brazed connections.NFPA 13 recognizes both brazed and soldered connections for copper piping. Table 9.3.5.5.2(e)covers piping with soldered connections. Brazed copper piping has different design considerations.These are: • The yield strength of the copper piping is reduced from 30 ksi to 9 ksi, due to theannealing effects of the brazing process. • ASCE/SEI 7-10 considers copper piping with brazedconnections ductile. The Response Factor Rp increases from 4.5 to 9, and the strength design stressincreases from 0.70Fy to 0.90Fy. The table reflects these design differences. A reference to the newTable 9.3.5.5.2(f) was added.

ResponseMessage:


195 of 474 11/7/2013 12:33 PM

Add Table 9.3.5.5.2(f) as follows:

Table 9.3.5.5.2(f) Maximum Load (Fpw) in Zone of Influence (lbs), (Fy = 9ksi) Type M Copper Tube (with Brazed Joints)

Lateral Sway Spacing (ft)a Diameter 20a 25b 30c 35c 40d

3/4 12 10 8 7 6 1 23 18 15 13 11

1 1/4 41 33 27 23 19 1 1/2 67 53 44 38 31

2e 140 112 92 78 66 a The tables for the maximum load Fpw, in zone of influence are based on specific configurations of mains and branch lines. b Assumes branch lines at center of pipe span and near each support. c Assumes branch lines at third-points of pipe span and near each support. d Assumes branch lines at quarter-points of pipe span and near each support. e Larger diameter pipe can be used when justified by engineering analysis.

Reason for Proposal

This proposal adds ZOI tables for copper piping with brazed connections. NFPA 13 recognizes both brazed and soldered connections for copper piping. Table 9.3.5.5.2(e) covers piping with soldered connections. Brazed copper piping has different design considerations. These are:

• The yield strength of the copper piping is reduced from 30 ksi to 9 ksi, due to the annealing effects of the brazing process.

• ASCE/SEI 7-10 considers copper piping with brazed connections ductile. The Response Factor Rp increases from 4.5 to 9, and the strength design stress increases from 0.70Fy to 0.90Fy.

The table reflects these design differences.


9.3.5.5.2.4

When determining permissible loads in accordance with 9.3.5.5.2 or 9.3.5.5.2.1 on a main withvarying sizes, the allowable load shall be based on the smallest pipe size within the zone of influence.




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Committee Statement

Committee Statement: The situation of a main of varying sizes is not currently addressed.

Response Message:



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9.3.5.5.2.3

The maximum permissible load in the zone of influence of a sway brace shall not exceed the values givenin Table 9.3.5.5.2(a) through Table 9.3.5.5.2(e) Table 9.3.5.5.2(f) or the values calculated in accordancewith 9.3.5.5.3.




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Submittal Date: Sat Aug 24 09:41:52 EDT 2013

Committee Statement

Committee Statement: Revised the references to include the new table created by FR-21.

Response Message:


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9.3.5.5.10*

The requirements of 9.3.5.3 shall not apply to pipes individually supported by rods less than 6 in. (152mm) long measured between the top of the pipe and the point of attachment to the buildingstructure. 9.3.5.5 shall be permitted to be omitted when either 9.3.5.5.10.1 or 9.3.5.5.10.2 are met.

9.3.5.5.10.1

Branch lines shall comply with the following:

(1)

(2) Seventy-five percent of all the hangers on the branch line shall meet, and not more than twoconsecutive hangers shall be permitted to exceed, the limitation in 9.3.5.5.10.1 (1).

9.3.5.5.10.2

Main piping shall comply with the following:

(1)

(2) Seismic coefficient ( C p ) shall not exceed 1.0.

(3) The nominal pipe diameter shall not exceed 6 in. (152 mm) for feed mains and 4 in. (102 mm) forcross mains.

(4) Seventy-five percent of all the hangers on the main shall meet, and not more than two consecutivehangers shall be permitted to exceed, the limitation in 9.3.5.5.10.2 (1).

(5) Hangers are not omitted in accordance with 9.2.4.3 , 9.2.4.4 , or 9.2.4.5 .



A.9.3.3.5.10_1_A.png Annex figure A.9.3.3.5.10.1(a)

A.9.3.3.5.10_1_B.png Annex figure A.9.3.3.5.10.1(b)

A9.3.5.5.10_FR46.1380820500217.1382107686112.docx




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Committee Statement

CommitteeStatement:

The current section allows omission of lateral bracing (I believe the reference to Section 9.3.5.3 isincorrect, should be 9.3.5.5) on all pipes using short rods. This allows large displacements (on theorder of 4" for even a modest swing of 30 degrees from vertical - see attached graphic). Looking at a

* The branch lines shall be individually supported within 6 in. (152 mm) of the structure, measuredbetween the top of the pipe and the point of attachment to the building structure.

* The main piping shall be individually supported within 6 in. (152 mm) of the structure, measuredbetween the top of the pipe and the point of attachment to the building structure.


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cross main in particular, all attached branch lines will deflect possibly allowing impact on sprinklers,forcing their hangers to accommodate large deflections without damage, and putting stress oncouplings. Additionally, the tributary force on a cross main hanger could be extremely large since itcould include long lengths of unrestrained branch lines. There is no way to determine the lateralcapacity of a hanger, since they are not designed for this purpose. Likewise, for a feed main, thelateral force on the hanger could be very large; again, there is no way to determine if the hanger isadequate to resist these forces and these hangers could be attached using methods adequate forvertical forces but questionable for lateral forces (e.g., using C-clamps). Lengths of feed mains andcross mains are limited so providing braces would not be overly expensive, and is justified based onthe great consequences of a main failure. Branch lines are typically smaller and are individual pipesrather than a piping system such as cross mains.

ResponseMessage:







199 of 474 11/7/2013 12:33 PM

A.9.3.5.5.10 This does not apply to piping supported by or suspended from trapeze hangers.

A.9.3.5.5.10.1(1) Figure A.9.3.5.5.10.1(1)(a) and Figure A.9.3.5.5.10.1(1)(b) are examples of how to measure the distance between the top of pipe and the point of attachment.

A.9.3.5.5.10.2(1) See Figure A.9.3.5.5.10.1(1)(a) and Figure A.9.3.5.5.10.1(1)(b) .

Insert attached Figures A.9.3.5.5.10.1(1)(a) and A.9.3.5.5.10.1(1)(b)

A.9.3.5.5.10.1(1)(a) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 1).

A.9.3.5.5.10.1(1)(b) Measurement for Distance Between Top of Pipe and Point of Attachment (Example 2).


9.3.5.9.3


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The horizontal force, Fpw, acting on the brace shall be taken as Fpw = CpWp, where Cp is the seismic

coefficient selected in Table 9.3.5.9.3 utilizing the short period response parameter, Ss.

Table 9.3.5.9.3 Seismic Coefficient Table

S s C p

0.33 or less 0.35

0.40 0.38

0.50 0.40

0.60 0.42

0.70 0.42

0.75 0.42

0.80 0.44

0.90 0.48

0.95 0.50

1.00 0.51

1.10 0.54

1.20 0.57

1.25 0.58

1.30 0.61

1.40 0.65

1.50 0.70

1.60 0.75

1.70 0.79

1.75 0.82

1.80 0.84

1.90 0.89

2.00 0.93

2.10 0.98

2.20 1.03

2.30 1.07

2.40 1.12

2.50 1.17

2.60 1.21

2.70 1.26

2.80 1.31

2.90 1.35

3.00 1.40


SS Cp SS Cp

0.33 or less 0.35 2.2 1.03

0.4 0.38 2.3 1.07

0.5 0.4 2.4 1.12

0.6 0.42 2.5 1.17

0.7 0.42 2.6 1.21

0.8 0.44 2.7 1.26

0.9 0.48 2.8 1.31


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SS Cp SS Cp

9.3.5.9.3.1

The value of Ss used in Table 9.3.5.9.3 shall be obtained from the authority having jurisdiction or from

seismic hazard maps.

9.3.5.9.3.2*

Linear interpolation shall be permitted to be used for intermediate values of Ss.



Revised_Table_9_3_5_9_3_-_Cp_Summary.docx New Cp Table




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Committee Statement

CommitteeStatement:

The USGS seismic hazard maps were revised in ASCE/SEI 7-10, and the maximum short periodresponse factor SS has increased. For example, the maximum value of SS in California nowexceeds 3.7g. The table has been expanded to include values of SS up to 4.0g, for compatibilitywith ASCE/SEI 7-10.

ResponseMessage:


202 of 474 11/7/2013 12:33 PM

Revise Table 9.3.5.9.3 as follows:


Reason for Proposal: The USGS seismic hazard maps were revised in ASCE/SEI 7-10, and the maximum short period response factor SS has increased. For example, the maximum value of SS in California now exceeds 3.7g. The table has been expanded to include values of SS up to 4.0g, for compatibility with ASCE/SEI 7-10.

SS Cp SS Cp 0.33 or less 0.35

2.20 1.03

0.40 0.38

2.30 1.07 0.50 0.40

2.40 1.12

0.60 0.42

2.50 1.17 0.70 0.42

2.60 1.21

0.80 0.44

2.70 1.26 0.90 0.48

2.80 1.31

1.00 0.51

2.90 1.35 1.10 0.54

3.00 1.40

1.20 0.57

3.10 1.45 1.30 0.61

3.20 1.49

1.40 0.65

3.30 1.54 1.50 0.70

3.40 1.59

1.60 0.75

3.50 1.63 1.70 0.79

3.60 1.68

1.80 0.84

3.70 1.73 1.90 0.89

3.80 1.77

2.00 0.93

3.90 1.82 2.10 0.98

4.00 1.87


9.3.5.9.6.1*

When riser nipples are provided in systems requiring seismic protection, they shall satisfy the followingequation, unless one of the following conditions is met: and are longer than 4 ft (1.2 m), the weight of thewater-filled branch line pipe in the zone of influence ( W p ) as defined by 9.3.5.9.1 , including the length

of the riser nipple, multiplied by the seismic coefficient ( C p ), and by the height of the riser nipple ( H r ),

divided by the section modulus ( S ) of the riser nipple piping shall not meet or exceed the yield strength( F y ) of the riser nipple piping. If the calculated value is equal to or greater than the yield strength or the

riser nipple, the longitudinal seismic load of each line shall be evaluated individually and branch linesshall be provided with longitudinal sway bracing per 9.3.5.6 .

(1) Where riser nipples are 4 ft (1.2 m) or less in length and C p is 0.50 or less

(2) Where riser nipples are 3 ft (915 mm) or less in length and C p is less than 0.67

(3) Where riser nipples are 2 ft (610 mm) in length or less and C p is less than is 1.0

where:

Hr = length of riser nipple piping (in inches)

Wp = tributary weight (in pounds) for the branch line or portion of branch line within the zone of influenceincluding the riser nipple

Cp = seismic coefficient

S = sectional modulus of the riser nipple pipe

Fy = allowable yield strength of 30,000 psi for steel, 30,000 psi for copper (soldered), 8000 psi for CPVC




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Committee Statement

CommitteeStatement:

The original language added to the 2013 edition of NFPA 13 only considered the length of the risernipple. This revised language looks at the Cp value as well as a means for determining when thecalculation is needed. For nipples meeting one of the 3 scenarios in the list, the calculation isn'tnecessary.

ResponseMessage:




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9.3.5.9.6.2

If the calculated value is equal to or greater than the yield strength of the riser nipple, the longitudinalseismic load of each line shall be evaluated individually, and branch lines shall be provided withlongitudinal sway bracing per 9.3.5.6 9.3.5.4 .




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Committee Statement

Committee Statement: Editorial correction (incorrect reference).

Response Message:


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9.3.6.1*

Restraint is considered a lesser degree of resisting loads than bracing and shall be provided by use of oneof the following:

(1) Listed sway brace assembly

(2) Wraparound U-hook satisfying the requirements of 9.3.5.5.11

(3) No. 12, 440 lb (200 kg) wire installed at least 45 degrees from the vertical plane and anchored onboth sides of the pipe

(4) CPVC hangers utilizing two points of attachment listed to provide restraint

(5)

(6) Other approved means




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Committee Statement

CommitteeStatement:

CPVC hangers exist that are listed to provide restraint, this technical oversight has beencorrected by this revision.

ResponseMessage:


* Hanger not less than 45 degrees from vertical installed within 6 in. (152 mm) of the vertical hangerarranged for restraint against upward movement, provided it is utilized such that l/r does not exceed400, where the rod shall extends to the pipe or have a surge clip has been installed


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9.3.6.4*

Branch lines shall be laterally restrained at intervals not exceeding those specified in Table 9.3.6.4(a) orTable 9.3.6.4(b) based on branch line diameter and the value of Cp.

Table 9.3.6.4(a) Maximum Spacing (ft) of Steel Branch Line Restraints

Seismic Coefficient ( C p )

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 C p > 0.71

1 43 36 26

1 1 ⁄4 46 39 27

1 1 ⁄2 49 41 29

2 53 45 31

Table 9.3.6.4(a) Maximum Spacing (ft), of Steel Pipe Restraints

Seismic Coefficient, C p

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 0.71 < C P ≤ 1.40 C P ≥ 1.40

1 ⁄2 34 29 20 183 ⁄4 38 32 23 20

1 43 36 26 22

1 1 ⁄4 46 39 27 24

1 1 ⁄2 49 41 29 25

2 53 45 31 27

Note: For SI values, 1 in = 25.4 mm

Table 9.3.6.4(b) Maximum Spacing (ft) of CPVC and Copper Branch Line Restraints

Seismic Coefficient ( C p )

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 C p > 0.71

3 ⁄4 31 26 18

1 34 28 20

1 1 ⁄4 37 31 22

1 1 ⁄2 40 34 24

2 45 38 27

Table 9.3.6.4(b) Maximum Spacing (ft), of CPVC and Copper Pipe Restraints

Seismic Coefficient C p

Pipe (in.) C p ≤ 0.50 0.5 < C p ≤ 0.71 0.71 < C P ≤ 1.40 C P ≥ 1.40

1 ⁄2 26 22 16 133 ⁄4 31 26 18 15

1 34 28 20 17

1 1 ⁄4 37 31 22 19

1 1 ⁄2 40 34 24 20

2 45 38 27 23

Note: For SI values, 1 in = 25.4 mm



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Revise_Tables_Section_9_3_6_4_a_b_-8-13-2013.docx




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Committee Statement

CommitteeStatement:

There are times when smaller diameter pipes are used and the tables have been expanded toprovide maximum restraint spacing for these pipes. A column has been added to account for thehigher values of CP which may occur due to the new USGS seismic hazard maps. The term “branchline has been changed to “pipe”, since these tables could be used for to determine the distancebetween restraints of small diameter pipe such as trim lines.

ResponseMessage:



208 of 474 11/7/2013 12:33 PM

Revise Tables 9.3.6.4(a), and (b) as follows:

Table 9.3.6.4(a) Maximum Spacing (ft), of Steel Pipe Restraints

Seismic Coefficient, CP Pipe (in) CP≤0.50 0.5<CP≤0.71 0.71<CP≤1.40 CP≥1.40

1/2 34 29 20 18 3/4 38 32 23 20 1 43 36 26 22

1 1/4 46 39 27 24 1 1/2 49 41 29 25

2 53 45 31 27 Note: For SI values, 1 in = 25.4 mm

Table 9.3.6.4(b) Maximum Spacing (ft), of CVPC and Copper Pipe Restraints

Seismic Coefficient CP Pipe (in) CP≤0.50 0.5<CP≤0.71 0.71<CP≤1.40 CP≥1.40

1/2 26 22 16 13 3/4 31 26 18 15 1 34 28 20 17

1 1/4 37 31 22 19 1 1/2 40 34 24 20

2 45 38 27 23 Note: For SI values, 1 in = 25.4 mm

A.9.3.6.4(a)

It is not the intent of this section to require restraint of piping associated with valve trim, water motor gong piping, air or nitrogen supply piping or other piping that is not essential to the operation of the sprinkler system. Essential piping such as fire pump sensing lines and diesel fuel lines are some examples of small piping which should be restrained.

Reason for Proposal

There are times when smaller diameter pipes are used and the tables have been expanded to provide maximum restraint spacing for these pipes. A column has been added to account for the higher values of CP which may occur due to the new USGS seismic hazard maps. The term “branch line has been

changed to “pipe”, since these tables could be used for to determine the distance between restraints of small diameter pipe such as trim lines.




9.3.8* Pipe Stands Subject to Earthquakes.

9.3.8.1

In areas where the horizontal force factor exceeds 0.5 Wp, pipe stands over 4 ft (1.2 m) in height shallbe certified by a registered professional engineer to be adequate for the seismic forces.

9.3.8.2

Where seismic protection is provided, concrete anchors used to secure pipe stands to their base shallbe in accordance with ACI 355.2, Qualification of Post-Installed Mechanical Anchors in Concrete andCommentary , and installed in accordance with manufacturer’s instructions.

9.3.8.3

Pipe saddles shall not be used to attach the system piping to the pipe stand.




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Committee Statement

CommitteeStatement:

The Committee has agreed that pipe stand requirements should be specified as part of the othersupport requirements for water-based fire protection systems. The text for the first revision has beenadapted from existing criteria in NFPA 15 as well as efforts from a task group on this subject. Thefollowing concepts that were sought to be incorporated were: an alternate requirement forprofessional engineers, material options for the pipe stand, addressing the slenderness ratio of pipe ina column, addressing thrust from system filling or dry applications, addressing the use of pipesaddles, interior versus exterior applications, addressing pipe stands when in areas subject to seismicrequirements. Other standards and model codes reference NFPA 13 for requirements on hanging,supporting and bracing water based fire protection equipment. The Committee and task grouprecognize that additional information will be needed at the second revision. Items anticipated includebase plate information, looped piping, and figures for clearer explanations.

ResponseMessage:


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11.1.2* Adjacent Hazards or Design Methods.

For buildings with two or more adjacent hazards or design methods, the following shall apply:

(1) Where areas are not physically separated by a draft curtain, barrier, or partition capable of delayingheat from a fire in one area from fusing sprinklers in the adjacent area, the required sprinklerprotection for the more demanding design basis shall extend 15 ft (4.6 m) beyond its perimeter.

(2) The requirements of 11.1.2(1) shall not apply where the areas are separated by a draft curtain,barrier, or partition that is capable of preventing delaying heat from a fire in one area from fusingsprinklers in the adjacent area.

(3) The requirements of 11.1.2(1) shall not apply to the extension of more demanding criteria from anupper ceiling level to beneath a lower ceiling level where the difference in height between the ceilinglevels is at least 2 ft (0.6 m).




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Committee Statement

CommitteeStatement:

The terminology between sections 11.1.2(1) and 11.1.2(2) needs to be consistent. One currentlyuses the terminology "delay" while the other uses the term "prevent". Since "prevent" has a morepermanent connotation, its use here is inappropriate. The intent is to delay the operation ofsprinklers in the remote area until sprinklers over the fire have had a chance to open.

ResponseMessage:



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11.3.1.3

Unless the requirements of 11.3.1.4 are met, the minimum required discharge from each of the fourhydraulically most demanding sprinklers design area sprinkler shall be the greater of the following:

(1) In accordance with minimum flow rates indicated in individual the sprinkler listings

(2) Calculated based on delivering a minimum of 0.1 gpm/ft 2 (4.1 mm/min) over the design area inaccordance with the provisions of 8.5.2.1 or 8.6.2.1.2 In rooms or compartments greater than 800

ft² (74.3 m 2 ), calculated based on delivering a minimum of 0.1 gpm/ft 2 (4.1 mm/min) over thedesign area in accordance with the provisions of 8.5.2.1

(3) In rooms or compartments 800 ft 2 (74.3 m 2 ) or less calculated based on delivering a minimum of

0.1 gpm/ft 2 (4.1 mm/min) over the room or the compartment using the area of the room divided bythe number of sprinklers in the room




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Committee Statement

CommitteeStatement:

This section has been modified to incorporate the current requirements for average spacing ofsprinklers in small rooms into this section. An annex section has been added to clarify how tocalculate average spacing.

ResponseMessage:



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12.1.3.1.1


For corrugated metal deck roofs up to 3 in. (76 mm) in depth, the maximum roof height shall bemeasured from floor to the bottom of the deck.

12.1.3.1.2

For decks deeper than 3 in. (76 mm), the maximum roof height shall be measured to the highest pointon the deck.

12.1.3.1.3

For ceilings that have insulation installed directly against underside of the ceiling or roof structure, themaximum roof height shall be measured to the bottom of insulation and shall be in accordance with12.1.3.1.3.1 or 12.1.3.1.3.2 .

12.1.3.1.3.1

For insulation that is installed directly against the ceiling or roof structure and is installed flat and parallelto the ceiling or roof structure, the maximum roof height shall be measured to the underside of theinsulation.

12.1.3.1.3.2

For insulation that is installed in a manner that causes it to deflect or sag down from the ceiling or roofstructure, the maximum roof height shall be measured as half of the distance of the deflection from theinsulation high point to the insulation low point. If the deflection or sag in the insulation exceeds 6 in.(152 mm), the maximum roof height shall be measured to the high point of the insulation.




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Committee Statement

CommitteeStatement:

The maximum roof deck should be measured with regards to the same criteria applied toclearance to ceiling and deflector distance.

ResponseMessage:



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12.1.3.1

The maximum building height shall be measured to the underside of the roof deck or ceiling or inaccordance with 12.1.3.1.1 through 12.1.3.1.3 .

12.1.3.1.1


For corrugated metal deck roofs up to 3 in. (76 mm) in depth, the maximum roof height shall bemeasured from floor to the bottom of the deck.

12.1.3.1.2

For decks deeper than 3 in. (76 mm), the maximum roof height shall be measured to the highest pointon the deck.

12.1.3.1.3

For ceilings that have insulation installed directly against underside of the ceiling or roof structure, themaximum roof height shall be measured to the bottom of insulation and shall be in accordance with12.1.3.1.3.1 or 12.1.3.1.3.2 .

12.1.3.1.3.1

For insulation that is installed directly against the ceiling or roof structure and is installed flat and parallelto the ceiling or roof structure, the maximum roof height shall be measured to the underside of theinsulation.

12.1.3.1.3.2

For insulation that is installed in a manner that causes it to deflect or sag down from the ceiling or roofstructure, the maximum roof height shall be measured as half of the distance of the deflection from theinsulation high point to the insulation low point. If the deflection or sag in the insulation exceeds 6 in.(152 mm), the maximum roof height shall be measured to the high point of the insulation.




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Committee Statement

CommitteeStatement:

The maximum roof deck should be measured with regards to the same criteria applied toclearance to ceiling and deflector distance.

ResponseMessage:



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12.3* Adjacent Hazards or Design Methods.

For buildings with two or more adjacent hazards or design methods, the following shall apply:

(1) Where areas are not physically separated by a barrier or partition capable of delaying heat from a firein one area from fusing sprinklers in the adjacent area, the required sprinkler protection for the moredemanding design basis shall extend 15 ft (4.6 m) beyond its perimeter.

(2) The requirements of 12.3(1) shall not apply where the areas are separated by a draft curtain,barrier, or partition that is capable of preventing delaying heat from a fire in one area from fusingsprinklers in the adjacent area.

(3) The requirements of 12.3(1) shall not apply to the extension of more demanding criteria from anupper ceiling level to beneath a lower ceiling level where the difference in height between the ceilinglevels is at least 2 ft (0.6 m).




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Committee Statement

CommitteeStatement:

The terminology between sections 12.3(1) and 12.3(2) needs to be consistent. One currently usesthe terminology "delay" while the other uses the term "prevent". Since "prevent" has a morepermanent connotation, its use here is inappropriate. All we are trying to do is delay the operation ofsprinklers in the remote area until sprinklers over the fire have had a chance to open. The term draftcurtain has been added to clarify that this is an acceptable means of delay sprinkler.

ResponseMessage:



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12.4.3

ESFR sprinklers shall only be permitted to be wet pipe systems.




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Committee Statement

CommitteeStatement:

This section is unnecessary as section 8.6.4.1 already addresses what types of systems canuse ESFR sprinklers.

ResponseMessage:


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12.5.2

Densities and areas shall be selected so that the final area of operation after the 30 percent increase is

not greater than 3900 ft 2 (360 m 2 ).




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The density/area curves only have a maximum 3,000 ft2 area on the curve, it is not possible toexceed this value when selecting a point on the curve.

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First Revision No. 195-NFPA 13-2013 [ Section No. 12.6.7 [Excluding any Sub-Sections]

]

CMSA and ESFR sprinklers shall be permitted to protect storage of Class I through Class IV commodities,Group A plastic commodities, miscellaneous storage, and other storage as specified in Chapter 12through Chapter 20 or by other NFPA standards.




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CommitteeStatement:

This revision is offered to clarify, that the requirements are concerned with Group A plastics, asother types of plastics would be classified as Class III or Class IV commodities.

ResponseMessage:

Public Input No. 284-NFPA 13-2013 [Section No. 12.6.7 [Excluding any Sub-Sections]]


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12.6.7.1

ESFR sprinklers designed to meet any criteria in Chapter 14 through Chapter 20 shall be permitted toprotect light and ordinary hazard occupancies. any of the following:

(1) Light hazard occupancies

(2) Ordinary hazard occupancies

(3) Any storage arrangement in Chapter 13 referencing OH1, OH2, EH1, and EH2 design criteria




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For limited amounts of storage within chapter 13 any ESFR design should provideadequate protection.

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12.6.7.2

Quick-response CMSA sprinklers designed to meet any criteria in Chapter 14 through Chapter 20 shallbe permitted to protect light and ordinary hazard occupancies. any of the following:

(1) Light hazard occupancies






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For limited amounts of storage within chapter 13 any CMSA design should provideadequate protection.

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12.6.7.3

Standard-response CMSA sprinklers designed to meet any criteria in Chapter 14 through Chapter 20shall be permitted to protect ordinary hazard occupancies. any of the following:






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For limited amounts of storage within chapter 13 any CMSA design should provideadequate protection.

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12.8.6 Hydraulically Designed Occupancy Hazard Fire Control Sprinkler System.

Unless indicated otherwise, the minimum water supply requirements for a hydraulically designedsprinkler system shall be determined by adding the hose stream allowance from Table 12.8.6 to thewater demand for sprinklers.

Table 12.8.6 Hose Stream Allowance and Water Supply Duration

SprinklerType

SprinklerSpacing

Type

Number ofSprinklers in

Design Area *

Size of DesignArea

Hose StreamAllowance

Water SupplyDuration

(minutes)gpm L/min

Control modedensity/area

Standard andextended-coverage

NA

Up to 1200 ft 2

(111 m 2 ) 250 950 60

Over 1200 ft 2

(111 m 2 ) up to

1500 ft 2 (139

m 2 ) 500 1900 90

Over 1500 ft 2

(139 m 2 ) up to

2600 ft 2 (240

m 2 ) 500 1900 120

Over 2600 ft 2

(240 m 2 ) 500 1900 150

CMSA

Standard

Up to 12 NA 250 950 60

Over 12 to 15 NA 500 1900 90

Over 15 to 25 NA 500 1900 120

Over 25 NA 500 1900 150

Extended-coverage

Up to 6 NA 250 950 60

Up to 8

144 ft 2 (13.4

m 2 ) maximum 250 950 60

Over 6 to 8 NA 500 1900 90

Over 8 to 12 NA 500 1900 120

Over 12 NA 500 1900 150

ESFR Standard

Up to 12 NA 250 950 60

Over 12 to 15 NA 500 1900 90

Over 15 to 25 NA 500 1900 120

Over 25 NA 500 1900 150

NA: Not applicable.

* For CSMA and ESFR sprinklers the additional sprinklers included in the design area for obstructionsdo not need to be considered in determining the total number of sprinklers in this column.


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12.8.6.1

Unless indicated otherwise, the minimum water supply requirements for a hydraulically designedoccupancy hazard fire control sprinkler system shall be determined by adding the hose streamallowance from Table 12.8.6.1 to the water supply for sprinklers.

Table 12.8.6.1 Hose Stream Allowance and Water Supply Duration

SprinklerType

SprinklerSpacing

Type

Number ofSprinklers in

Design Area *

Size of DesignArea

Hose StreamAllowance

Water SupplyDuration

(minutes)gpm L/min


Standard andextended-coverage

NA

Up to 1200 ft 2

(111 m 2 ) 250 950 60

Over 1200 ft 2

(111 m 2 ) up to

1500 ft 2 (139

m 2 ) 500 1900 90

Over 1500 ft 2

(139 m 2 ) up to

2600 ft 2 (240

m 2 ) 500 1900 120

Over 2600 ft 2

(240 m 2 ) 500 1900 150

CMSA

Standard

Up to 12 NA 250 950 60

Over 12 to 15 NA 500 1900 90

Over 15 to 25 NA 500 1900 120

Over 25 NA 500 1900 150

Extended-coverage

Up to 6 NA 250 950 60

Up to 8

144 ft 2 (13.4

m 2 ) maximum 250 950 60

Over 6 to 8 NA 500 1900 90

Over 8 to 12 NA 500 1900 120

Over 12 NA 500 1900 150

ESFR Standard

Up to 12 NA 250 950 60

Over 12 to 15 NA 500 1900 90

Over 15 to 25 NA 500 1900 120

Over 25 NA 500 1900 150

NA: Not applicable.

* For CSMA and ESFR sprinklers the additional sprinklers included in the design area for obstructionsdo not need to be considered in determining the total number of sprinklers in this column.

12.8.6.2

Unless indicated otherwise, the supply determined in accordance with 12.8.6.1 shall be available forthe minimum duration specified in Table 12.8.6.1 .




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CommitteeStatement:

This section does not address occupancy hazard fire control, therefore this section needs to berevised and simplified to address water supply and duration requirements.

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First Revision No. 183-NFPA 13-2013 [ Section No. 12.9.1 [Excluding any Sub-Sections]

]

When using the density/area method or room design method , unless the requirements of 12.9.2 are metfor buildings having unsprinklered combustible concealed spaces as described in 8.15.1.2 and 8.15.6, the

minimum area of sprinkler operation for that portion of the building shall be 3000 ft2 (279 m2).




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Ch 12 allows the room method to be used for storage applications, and as such this sectionmust be updated to acknowledge this allowance.

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12.9.2

The following unsprinklered combustible concealed spaces shall not require a minimum design area of

sprinkler operation of 3000 ft2 (279 m2):

(1) Noncombustible and limited-combustible concealed spaces with minimal combustible loading havingno access. The space shall be considered a concealed space even with small openings such asthose used as return air for a plenum.

(2) Noncombustible and limited-combustible concealed spaces with limited access and not permittingoccupancy or storage of combustibles. The space shall be considered a concealed space even withsmall openings such as those used as return air for a plenum.

(3) Combustible concealed spaces filled entirely with noncombustible insulation.

(4) Concealed spaces where rigid materials are used and the exposed surfaces have a flame spreadindex of 25 or less and the materials have been demonstrated to not propagate fire more than 10.5 ft(3.2 m) when tested in accordance with ASTM E 84, Standard Test Method for Surface BurningCharacteristics of Building Materials, or ANSI/UL 723, Standard for Test for Surface BurningCharacteristics of Building Materials, extended for an additional 20 minutes in the form in which theyare installed in the space.

(5) Concealed spaces in which the exposed materials are constructed entirely of fire retardant–treatedwood as defined by NFPA 703.

(6) Concealed spaces over isolated small rooms compartments not exceeding 55 ft2 (5.1 m2) in area.

(7) Vertical pipe chases under 10 ft2 (0.93 m2), provided that in multifloor buildings the chases arefirestopped at each floor using materials equivalent to the floor construction. Such pipe chases shallcontain no sources of ignition, piping shall be noncombustible, and pipe penetrations at each floorshall be properly sealed.

(8) Exterior columns under 10 ft2 (0.93 m2) in area formed by studs or wood joists, supporting exteriorcanopies that are fully protected with a sprinkler system.




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* Light or ordinary hazard occupancies where noncombustible or limited-combustible ceilings are

directly attached to the bottom of solid wood joists so as to create enclosed joist spaces 160 ft 3

(4.5 m 3 ) or less in volume, including space below insulation that is laid directly on top or within theceiling joists in an otherwise sprinklered concealed space.

* Light or ordinary hazard occupancies where noncombustible or limited-combustible ceilings areattached to the bottom of composite wood joists either directly or on to metal channels notexceeding 1 in. (25.4 mm) in depth, provided the adjacent joist channels are firestopped into

volumes not exceeding 160 ft 3 (4.5 m 3 ) using materials equivalent to ½ in. (12.7 mm) gypsumboard and at least 3½ in. (90 mm) of batt insulation is installed at the bottom of the joist channelswhen the ceiling is attached utilizing metal channels.


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Committee Statement

CommitteeStatement:

This sections deals only with concealed spaces so we suggest to adjust the title even thought thecompanion section in Chapter 11 uses the term Restrictions. Also the section deals with storage sodelete the references to light and ordinary hazard as they are covered in Chapter 11.

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First Revision No. 200-NFPA 13-2013 [ Section No. 12.10.2 [Excluding any

Sub-Sections] ]

To utilize the room design method, all rooms shall be enclosed with walls having a fire resistance ratingequal to the required water supply duration indicated in Chapters 13 through 20 .




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CommitteeStatement:

Change needed to recognize the additional storage design approaches provided by Chapter21. The reference to the specific chapters is unnecessary.

ResponseMessage:

Public Input No. 393-NFPA 13-2013 [Section No. 12.10.2 [Excluding any Sub-Sections]]


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12.12.1.2


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Wood pallets, where stored indoors, shall be protected in accordance with one of the following:

(1) Control mode density/area sprinkler protection as specified in Table 12.12.1.2(a).

(2) CMSA sprinkler protection in accordance with Table 12.12.1.2(b) .

(3) ESFR sprinkler protection in accordance with Table 12.12.1.2(c) .

(4) Control mode density/area sprinkler protection in accordance with the OH2 curve of Figure 13.2.1existing with a hose stream demand of at least 250 gpm (946 L/min) for a duration of at least 60minutes when pallets are stored no higher than 6 ft (1.8 m) and each pile of no more than four stacksshall be is separated from other pallet piles by at least 8 ft (1.4 m) of clear space or 25 ft (7.6 m) ofcommodity. The maximum clearance to ceiling of 20 ft (6.1 m) specified in 12.1.3.4 shall not apply toarrangement 12.12.1.2(4).

Table 12.12.1.2(a) Control Mode Density/Area Sprinkler Protection for Indoor Storage of Idle WoodPallets

Type ofSprinkler

Locationof

StorageNominalK-Factor

MaximumStorageHeight

MaximumCeling/Roof

Height Sprinkler Density

Areas of Operation

HighTemperature

OrdinaryTemperature

ft m ft m gpm/ft 2 mm/min ft 2 m 2 ft 2 m 2

Controlmodedensity/area

On floor8 (115) or

largerUp

to 6

Upto

1.820 6.1 0.20 8.2 2000 186 3000 279

On floor11.2 (160)or larger

Upto 8

Upto

2.430 9.1 0.45 18.3 2500 232 4000 372

On flooror rackwithout

solidshelves

11.2 (160)or larger

8 to12

2.4to

3.730 9.1 0.6 24.5 3500 325 6000 557

12to20

3.7to

6.130 9.1 0.6 24.5 4500 418 — —

On floor16.8

(240) orlarger

Upto20

Upto

6.130 9.1 0.6 24.5 — — 2000 186

Table 12.12.1.2(a) Control Mode Density/Area Sprinkler Protection for Indoor Storage of Idle WoodPallets

Type ofSprinkler

Locationof Storage

NominalK-Factor


MaximumCeling/Roof

Height Sprinkler DensityAreas of

Operation

ft m ft m gpm/ft 2 mm/min ft 2 m 2


On floor8 (115) or

largerUp

to 6Up to1.8

20 6.1 0.20 8.2 3000 279


Upto 8

Up to2.4

30 9.1 0.45 18.3 2500 232

On floor orrack without

solidshelves

11.2 (160)or larger

8 to12

2.4 to3.7

30 9.1 0.6 24.5 3500 325

12 to20

3.7 to6.1

30 9.1 0.6 24.5 4500 418


Upto 20

Up to6.1

30 9.1 0.6 24.5 2000 186

Note: The area of sprinkler operation should be permitted to be reduced to 2000 ft 2 (186 m 2 ) whensprinklers having a nominal k-factor of 11.2 or larger are used or if high temperature–rated sprinklers with


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a nominal k-factor of 8.0 are used.

Table 12.12.1.2(b) CMSA Sprinkler Protection for Indoor Storage of Idle Wood Pallets

StorageArrangement

CommodityClass


MaximumCeiling/Roof

HeightK-Factor/

Orientation

Type ofSystem

Number ofDesign

Sprinklers

MinimumOperatingPressure

ft m ft m psi bar

On floorIdle wood

pallets20 6.1

30 9.1

11.2 (160)

Upright

Wet 15 25 1.7

Dry 25 25 1.7

16.8 (240)

Upright

Wet 15 15 1.0

Dry 25 15 1.0

19.6 (280)

PendentWet 15 16 1.1

35 10.619.6 (280)


40 12.119.6 (280)


Table 12.12.1.2(c) ESFR Sprinkler Protection for Indoor Storage of Idle Wood Pallets

Type of Sprinkler(Orientation)

Location ofStorage

NominalK-Factor


MaximumCeiling/

Roof Height


ft m ft m psi bar

ESFR (pendent)On floor or rackwithout solidshelves

14.0 (200)25 7.6 30 9.1 50 3.4

25 7.6 32 9.8 60 4.1

16.8 (240)

25 7.6 30 9.1 35 2.4

25 7.6 32 9.8 42 2.9

35 10.7 40 12.2 52 3.6

22.4 (320)

25 7.6 30 9.1 25 1.7

30 9.1 35 10.7 35 2.4

35 10.7 40 12.2 40 2.8

25.2

(360)

25 7.6 30 9.1 15 1.0

30 9.1 35 10.7 20 1.4

35 10.7 40 12.2 25 1.7

ESFR (upright) On floor 14.0

(200)

20 6.1 30 9.1 50 3.4

20 6.1 35 10.7 75 5.2

16.8

(240)

20 6.1 30 9.1 35 2.4

20 6.1 35 10.7 52 3.6

12.12.1.2.1

The maximum clearance to ceiling of 20 ft (6.1 m) specified in 12.1.3.4 shall not apply to arrangement12.12.1.2 (4).



Rev_Table_12.12.1.2a.1379602080093_1_.docx



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CommitteeStatement:

During the 2013 revision cycle for NFPA 13, the SSD Technical Committee supported a revision toTable 12.12.1.2(a) to eliminate reference to the sprinkler temperature rating in the table. The testdata provided in Table A.12.12(a) indicates that nominal K=11.2 sprinklers in the ordinarytemperature rating provide improved performance compared to high temperature rated sprinklers.Larger design areas should not be required when ordinary temperature rated sprinklers having anominal K-factor of 11.2 or larger are used.

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Note: The area of sprinkler operation should be permitted to be reduced to 2000 ft2 (186 m2) when sprinklers having a nominal K-factor of 11.2 or larger are used or if high temperature–rated sprinklers with a nominal K-factor of 8.0 are used.

3000 279

2000 186

First Revision No. 316-NFPA 13-2013 [ Chapter 13 [Title Only] ]

Miscellaneous and Low-Piled Storage




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This Chapter covers low-piled storage, however since the title only addresses miscellaneousstorage, many people never look here for low-piled storage sprinkler protection criteria.

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First Revision No. 314-NFPA 13-2013 [ Sections 13.1, 13.2 ]

13.1 Miscellaneous Storage Up to 12 ft (3.7 m) in Height. General.

13.1.1

This chapter shall apply to any of the following situations:

(1) Miscellaneous storage of Class I through Class IV commodities up to 12 ft (3.7 m) in height

(2) Miscellaneous storage of Group A plastics up to 12 ft (3.7 m) in height

(3) Miscellaneous storage of rubber tires up to 12 ft (3.7 m) in height

(4) Miscellaneous storage of rolled paper up to 12 ft (3.7 m) in height

(5) Storage of Class I through Class IV commodities up to 12 ft (3.7 m) in height as directed by14.2.3.1 and 16.2.1.2.1

(6) Storage of Group A plastics up to 5 ft (1.5 m) in height as directed by 15.2.1 and 17.2.1.1

13.1.2 Hose Connections.

Hose connections shall not be required for the protection of miscellaneous storage.

13.2 Design Basis.


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13.2.1


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The protection criteria shall be selected from Table 13.2.1 and Figure 13.2.1 shall apply to any of thefollowing situations: .

Miscellaneous storage of Class I through Class IV commodities up to 12 ft (3.7 m) in height

Miscellaneous storage of Group A plastics up to 12 ft (3.7 m) in height

Miscellaneous storage of rubber tires up to 12 ft (3.7 m) in height

Miscellaneous storage of rolled paper up to 12 ft (3.7 m) in height

Storage of Class I through Class IV commodities up to 12 ft (3.7 m) in height as directed by14.2.3.1 and 16.2.1.2.1

Storage of Group A plastics up to 5 ft (1.5 m) in height as directed by 15.2.1 and 17.2.1.1

Table 13.2.1 Discharge Criteria for Miscellaneous Storage Up to 12 ft (3.7 m) in Height

CommodityType ofStorage

StorageHeight

MaximumCeilingHeight

DesignCurve

Figure13.2.1

Note

InsideHose

TotalCombinedInside and

OutsideHose

Duration(minutes)

ft m ft m gpm L/min gpm L/min

Class I to Class IV

Class ISolid-piled,palletized,bin box,shelf,single-,double-,multiple-rowrack, andback-to-backshelf storage

≤12 ≤3.7 — — OH10, 50,100

0, 189,379

250 946 90

Class II ≤10 ≤3.0 — — OH10, 50,100

0, 189,379

250 946 90

Class II>10to≤12

>3.0to≤3.7

— — OH20, 50,100

0, 189,379

250 946 90

Class III ≤12 ≤3.7 — — OH20, 50,100

0, 189,379

250 946 90

Class IV ≤10 ≤3.0 — — OH20, 50,100

0, 189,379

250 946 90

Class IV

Palletized,bin box,shelf, andsolid-piled

>10to≤12

>3.0to≤3.7

32 9.8 OH20, 50,100

0, 189,379

250 946 90

Rack Single-,double-,multiple-rowrack andback-to-backshelf storage

>10to≤12

>3.0to≤3.7

32 9.8 EH10, 50,100

0, 189,379

500 1893 120

Group A Plastic Storage

CartonedUnexpanded

andexpanded

Solid-piled,palletized,bin box,shelf,single-,double-,multiple-rowrack, andback-to-backshelf storage

≤5 ≤1.5 — — OH20, 50,100

0, 189,379

250 946 90

>5to≤10

>1.5to≤3.0

15 4.6 EH10, 50,100

0, 189,379

500 1893 120

>5to≤10

>1.5to≤3.0

20 6.1 EH20, 50,100

0, 189,379

500 1893 120

>10to≤12

>3.0to≤3.7

17 5.2 EH20, 50,100

0, 189,379

500 1893 120


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CommodityType ofStorage

StorageHeight

MaximumCeilingHeight

DesignCurve

Figure13.2.1

Note

InsideHose

TotalCombinedInside and

OutsideHose

Duration(minutes)

ft m ft m gpm L/min gpm L/min

Figure 13.2.1 Miscellaneous Storage Up to 12 ft (3.7 m) in Height — Design Curves (see Table13.2.1).

13.2.2

Installation criteria as permitted by NFPA 13 and design criteria and modifiers as permitted by thedensity/area method of Chapter 11 for ordinary hazard Group 1, ordinary hazard Group 2, extra hazardGroup 1, and extra hazard Group 2 occupancies shall be applicable for the protection of any of thefollowing: .

Miscellaneous storage as described by Table 13.2.1

Commodity Class I through Class IV storage 12 ft (3.7 m) or less in height as directed by 14.2.3.1and 16.2.1.2.1

Storage of Group A plastics up to 5 ft (1.5 m) in height as directed by 15.2.1 and 17.2.1.1

13.2.3

Where K-11.2 (160) or larger sprinklers are used with EH1 or EH2 design curves from Figure 13.2.1, the

design area shall be permitted to be reduced by 25 percent but not below 2000 ft2 (186 m2), regardless oftemperature rating.



FR_314_Table_Revisions.pdf Table revision markup




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CommitteeStatement:

This is just editorial to better reflect that chapter 13 is not just miscellaneous storage and to follow aformat more consistent with the rest of the storage chapters. The definition of low-piled storage doesnot address the height difference between Class I- IV and Group A plastic as is the current case forHigh-piled storage. Deleted the forward reference to chapters 14, 15, 16, and 17 since those sectionsdirect users back to chap 13. Deleted portions of 13.2.2 since it provides no deviation from what’sallowed to be protected by the chapter in the current 13.2.1 so serves no purpose. The single term


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rack appears in the Table for several of the proteciton schemes while the use of single-, double- andmulti-row appears where rack is used with tires. Adding the specific guidance to those designationsfor Class I-IV and Group A Plastic will clarifiy the designation.

ResponseMessage:




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13.3.4.2

Maximum horizontal spacing of in-rack sprinklers in single- or double-row racks with Class I, II, III,or through IV commodities, Group A plastics, tires, and rolled paper shall be in accordance with Table13.3.4.2.

Table 13.3.4.2 In-Rack Sprinkler Spacing for Class I, II, III, and IV Commodities Stored in Single- orDouble-Row Racks Up to 12 ft (3.7 m) in Height

Commodity Class

Aisle Widths I and II III IV Group A Plastics, Tires and Rolled Paper

Encapsulated ft m ft m ft m ft m ft m

No 8 2.4 12 3.7 12 3.7 10 3.0 8 2.4

No 4 1.2 12 3.7 10 3.0 10 3.0 8 2.4

Yes — — 8 2.4 8 2.4 8 2.4 8 2.4



Table_13.3.4.2.docx rev Table 13.3.4.2




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Committee Statement

CommitteeStatement:

The criteria provided in Section 13.3.4.2 and the associated Table applies to Class I-IVCommodites; however, the only required installation of in-rack sprinklers provided by Table 13.2.1 isfor Group A Plastics and Tires. This revision provides additional clarification on in-rack sprinklerprotection in Table 13.3.4.2. While it is not very common to have in-racks for Class I-IV, it is possibleand design guidance should be included.

ResponseMessage:



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Group A Plastics, Tires and Rolled Paper Ft m 8 2.4 8 2.4 8 2.4



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14.4.1


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Protection of palletized and solid-piled storage of Class I through Class IV commodities shall be inaccordance with Table 14.4.1.

Table 14.4.1 ESFR Protection of Palletized and Solid-Piled Storage of Class I Through Class IVCommodities

Commodity


MaximumCeiling/Roof

HeightNominalK-Factor

Orientation


ft m ft m psi bar

Class I, II, III, or IV,encapsulated andnonencapsulated (noopen-top containers)

20 6.1 25 7.6

14.0

(200)

Upright/

pendent50 3.4

16.8

(240)

Upright/

pendent35 2.4

22.4

(320)Pendent 25 1.7

25.2

(360)Pendent 15 1.0

25 7.6

30 9.1

14.0

(200)

Upright/

pendent50 3.4

16.8

(240)

Upright/

pendent35 2.4

22.4

(320)Pendent Upright/pendent 25 1.7

25.2


32 9.8

14.0

(200)

Upright/

pendent60 4.1

16.8


30 9.1 35 10.7

14.0

(200)

Upright/

pendent75 5.2

16.8

(240)

Upright/

pendent52 3.6

22.4

(320)Pendent 35 2.4

25.2

(360)Pendent 20 1.4

35 10.7 40 12.2

16.8

(240)

Upright/

pendent Pendent52 3.6

22.4

(320)Pendent 40 2.8

25.2

(360)Pendent 25 1.7

35 10.7 45 13.7

22.4

(320)Pendent 40 2.8

25.2

(360)Pendent 40 2.8


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Commodity


MaximumCeiling/Roof

HeightNominalK-Factor

Orientation


ft m ft m psi bar




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Committee Statement

CommitteeStatement:

It appears that the design indicated is supposed to apply to the upright sprinkler as well as thependent sprinkler as this is the case for the design indicated for 30 ft storage in a 35 ft highceiling.

ResponseMessage:



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16.1.4 Fire Protection of Steel Columns — Columns Within Storage Racks of Class I Through Class IVand Plastic Commodities .

See Section C.10.

16.1.4.1*

Where fireproofing of building columns is not provided and storage heights are in excess of 15 ft (4.6 m),protection of building columns located wholly or partially within the rack structure or vertical rackmembers supporting the building footprint inclusive of flue spaces or within 12 in. (305 mm) of thefootprint shall be protected in accordance with one of the following:

(1) In-rack sprinklers

(2) Sidewall sprinklers at the 15 ft (4.6 m) elevation, pointed toward one side of the steel column

(3) Provision of ceiling sprinkler density for a minimum of 2000 ft2 (186 m2) with ordinary 165°F (74°C)or high-temperature 286°F (141°C) rated sprinklers as shown in Table 16.1.4.1 for storage heightsabove 15 ft (4.6 m), up to and including 20 ft (6.1 m)

(4) Provision of CMSA or ESFR ceiling sprinkler protection

Table 16.1.4.1 Ceiling Sprinkler Densities for Protection of Steel Building Columns

Commodity Classification

Aisle Width

4 ft (1.2 m) 8 ft (2.4 m)

gpm/ft2 (L/min)/m2 gpm/ft2 (L/min)/m2

Class I 0.37 15.1 0.33 13.5

Class II 0.44 17.9 0.37 15.1

Class III 0.49 20.0 0.42 17.1

Class IV 0.68 27.7 0.57 23.2

16.1.4.1.1

This protection shall not be required where storage in fixed racks is protected by in-rack sprinklers.

16.1.4.2

Where storage heights are in excess of 15 ft (4.6 m) and vertical rack members support the buildingstructure, the vertical rack members shall be protected in accordance with one of the options in16.1.4.1 .

16.1.4.3

The flow from a column sprinkler(s) shall be permitted to be omitted from the sprinkler system hydrauliccalculations.



Figure_A.16.1.4.1.docx Column Protection CH 16

A16.1.4.1_FR202.1380827167728.docx




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Committee Statement

CommitteeStatement:

The concept of “within the rack structure” needed to be better explained. There have been questionsabout whether columns in flue spaces, at the end of racks or in aisles are “within the rack structure”.This revision answers the question by providing a consistent measurement point. The distance of 12inches was selected as being half of the allowable width of a flue space. If there is a concern thatthere is insufficient heat to open a sprinkler centered in a flue space more than 24 inches wide, then acolumn in the same location (12 inches from the rack) should be acceptable without additionalprotection. Section 16.1.4.1.1 was added to the list of options rather than being a separate sectionbecause people are missing it as an option and to help Chapter 16 more closely parallel Chapter 17.Since parts 1, 2 and 3 of 16.1.4.1 are all acceptable options, in-rack sprinklers should be added asoption 4 rather than being in a completely different section. The concept of rack supported structureswas moved to a separate section in order to make the base paragraph easier to understand withoutcompound “or” phrases in the section. The annex note along with the Figure help to show the conceptpictorially for those people that understand figures rather than text.

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244 of 474 11/7/2013 12:33 PM

Figure A.16.1.4.1 – Protection of Columns Within and Adjacent to Rack Structure

Column 4

A.16.1.4.1 Columns at the ends of racks or in the aisles need to be protected from the heat of a fire in the racks if they are near the racks. Columns within the flue spaces are already within the footprint of the racks and need protection. In Figure A.16.1.4.1, Column 1 is within the flue space and needs protection. Column 2 is within 12 in. (305 mm) of the rack and needs protection. Column 3 is more than 12 in. (305 mm) away from the rack and does not need protection even though it is in an aisle. A portion of Column 4 is within 12 in. (305 mm) of the rack and therefore requires sprinkler protection.

Insert Figure A.16.1.4.1


16.1.6.5

Where the criteria in 16.1.6.6 are not met, the water demand for the in-rack sprinklers shall be based on aminimum flow of 30 gpm (114 L/min) discharging from the following number of sprinklers balanced to theceiling sprinkler demand in accordance with Section 23.8:

(1) Six sprinklers where only one level of in-rack sprinklers is installed to protect Class I, Class II, orClass III commodity

(2) Eight sprinklers where only one level of in-rack sprinklers is installed to protect Class IV commodity

(3) Ten sprinklers (five on each of the top two levels) where more than one level of in-rack sprinklers isinstalled to protect Class I, Class II, or Class III commodity

(4) Fourteen sprinklers (seven on each of the top two levels) when more than one level of in-racksprinklers is installed to protect Class IV commodity




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16.2.1.2.3

For storage 12 ft (3.7 m) or less in height that does not meet the definition of Miscellaneous Storagethat is on solid shelf racks, in-rack sprinklers shall be provided in accordance with 16.1.6 , and ceilingsprinkler protection shall be provided in accordance with Chapter 13 .




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Revisions have been created to Chapter 16 and 17 to require in-rack sprinkler protection forsolid shelf racks when the storage configuration is not miscellaneous storage. See FR 296 and297.

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246 of 474 11/7/2013 12:33 PM

First Revision No. 204-NFPA 13-2013 [ Sections 16.2.1.3.3.1, 16.2.1.3.3.2 ]

16.2.1.3.3.1 Multiple-Row Racks — Rack Depth Up to and Including 16 ft (4.9 m) with Aisles 8 ft (2.4 m)or Wider.

For Class I, Class II, Class III, or Class IV commodities, encapsulated or nonencapsulated, ceiling

sprinkler water demand in terms of density [gpm/ft2 (mm/min)] and area of sprinkler operation [ft2 (m2) ofceiling or roof] shall be selected from the density/area curves of Figure 16.2.1.3.2(a) through Figure16.2.1.3.2(d) that are appropriate for each commodity and configuration as shown in Table 16.2.1.3.3.1and shall be modified as appropriate by 16.2.1.3.4. The protection criteria shall apply to portable racksarranged in the same manner as single- or double-row multiple-row racks.

Table 16.2.1.3.3.1 Multiple-Row Racks — Rack Depth Up to and Including 16 ft (4.9 m), Aisles 8 ft (2.4m) or Wider and Storage Height Over 12 ft (3.7 m) Up to 25 ft (7.6 m)

HeightCommodity

Class

Encap-

sulated

SprinklersMandatory

In-Rack

Ceiling Sprinkler Water Demand

With In-Rack Sprinklers Without In-Rack Sprink

Figure CurvesApplyFigure

16.2.1.3.4.1

1.25 ×Density


16.2.1.3.4

Over 12ft (3.7m) up toandincluding15 ft (4.6m)

INo

No

16.2.1.3.2(a)

C and D

Yes

No 16.2.1.3.2(a) I and JYes

Yes 16.2.1.3.2(a) Yes 16.2.1.3.2(a) I and J

IINo 16.2.1.3.2(b) No 16.2.1.3.2(b) I and J Yes

Yes 16.2.1.3.2(b) Yes 16.2.1.3.2(b) I and J

IIINo No 16.2.1.3.2(c) No 16.2.1.3.2(c) I and J Yes

Yes 1 level 16.2.1.3.2(c) Yes NA NA

IV

No No 16.2.1.3.2(d) No 16.2.1.3.2(d) C and D No

Yes 1 level 16.2.1.3.2(d) A and B1.50 ×density

NA NA


INo

No

16.2.1.3.2(a)

C and D

Yes


Yes 16.2.1.3.2(a) Yes 16.2.1.3.2(a) I and J

IINo 16.2.1.3.2(b) No 16.2.1.3.2(b) I and J

YesYes 16.2.1.3.2(b) Yes 16.2.1.3.2(b) I and J

IIINo No 16.2.1.3.2(c) No 16.2.1.3.2(c) I and J Yes

Yes 1 level 16.2.1.3.2(c) Yes

NA NA NAIV

No

1 level

16.2.1.3.2(d) No

Yes 16.2.1.3.2(d) A nd B1.50 ×density


INo No 16.2.1.3.2(a)

C and D

No

No 16.2.1.3.2(a) I and J Yes

Yes 1 level 16.2.1.3.2(a) Yes

NA NA NA

IINo

1 level

16.2.1.3.2(b) No

Yes 16.2.1.3.2(b) Yes

IIINo 16.2.1.3.2(c) No

Yes 16.2.1.3.2(c) Yes

IV

No

2 levels

16.2.1.3.2(d) No

Yes 16.2.1.3.2(d) A and B1.50 ×density

NA: Not applicable.


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16.2.1.3.3.2 Multiple-Row Racks — Rack Depth Over 16 ft (4.9 m) or Aisles More Narrow Than 8 ft (2.4m).

For Class I, Class II, Class III, or Class IV commodities, encapsulated or nonencapsulated, ceiling

sprinkler water demand in terms of density [gpm/ft2 (mm/min)] and area of sprinkler operation [ft2 (m2) ofceiling or roof] shall be selected from the density/area curves of Figure 16.2.1.3.2(a) through Figure16.2.1.3.2(g) that are appropriate for each commodity and configuration as shown in Table 16.2.1.3.3.2and shall be modified as appropriate by 16.2.1.3.4. The protection criteria shall apply to portable racksarranged in the same manner as single-, double-, or multiple-row racks.

Table 16.2.1.3.3.2 Multiple-Row Racks — Rack Depth Over 16 ft (4.9 m) or Aisles Narrower Than 8 ft(2.4 m), Storage Height Over 12 ft (3.7 m) Up to and Including 25 ft (7.6 m)

HeightCommodity

Class

Encap-

sulated

SprinklersMandatory

In-Rack

Ceiling Sprinkler Water Demand

With In-Rack Sprinklers Without In-Rack Sprink


16.2.1.3.4.1

1.25 ×Density


16.2.1.3.4


INo

No

16.2.1.3.2(a)

C and D Yes


Yes 16.2.1.3.2(a) Yes 16.2.1.3.2(a) I and J

IINo 16.2.1.3.2(b) No 16.2.1.3.2(b) I and J

YesYes 16.2.1.3.2(b) Yes 16.2.1.3.2(b) I and J

IIINo 16.2.1.3.2(c) No 16.2.1.3.2(c) I and J Yes

Yes 1 level 16.2.1.3.2(c) Yes

IV

No No 16.2.1.3.2(d) No 16.2.1.3.2(d) C and D No

Yes 1 level 16.2.1.3.2(d)1.50 ×density


INo

1 level

16.2.1.3.2(a)

C and D Yes

No

NA NA NA

Yes 16.2.1.3.2(a) Yes

IINo 16.2.1.3.2(b) No

Yes 16.2.1.3.2(b) Yes

IIINo 16.2.1.3.2(c) No

Yes 16.2.1.3.2(c) Yes

IV

No 16.2.1.3.2(d) No

Yes 16.2.1.3.2(d)1.50 ×density


INo

1 level

16.2.1.3.2(a)

C and D No

No

NA NA NA

Yes 16.2.1.3.2(a) Yes

IINo 16.2.1.3.2(b) No

Yes 16.2.1.3.2(b) Yes

IIINo 16.2.1.3.2(c) No

Yes 16.2.1.3.2(c) Yes

IV

No

2 levels

16.2.1.3.2(d) No

Yes 16.2.1.3.2(d)1.50 ×density

NA: Not applicable.





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Editorial. Only Figures (a) through (d) apply to multiple row racks. Referencing multiple rowinstead of single and double-row as per section title.

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16.2.1.3.3.3

Where Class I, Class II, and Class III commodities are encapsulated, ceiling sprinkler density shall be25 percent greater than for nonencapsulated.




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Text needed to define criteria from Tables 16.2.1.3.3.1 and 6.2.1.3.3.2. Basically copied thatprovided in 16.3.1.1.1

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16.2.1.3.4.3

For storage height over 12 ft (3.7 m) up to and including 20 ft (6.1 m) protected with ceiling sprinklers andwith more than one level of in-rack sprinklers, but not in every tier, densities obtained from design curvesand adjusted in accordance with Figure 16.2.1.3.4.1 shall be permitted to be reduced an additional 20percent, as indicated in Table 16.2.1.3.4.3.

Table 16.2.1.3.4.3 Adjustment to Ceiling Sprinkler Density for Storage Height and In-Rack Sprinklers

Storage HeightIn-Rack

Sprinklers

Apply Figure16.2.1.3.4.1 for Storage

Height Adjustment

Permitted Ceiling SprinklersDensity Adjustments Where

In-Rack Sprinklers Are Installed

Over 12 ft (3.7 m)through 25 ft (7.6m)

None Yes None

Over 12 ft (3.7 m)through 20 ft (6.1m)

Minimum required Yes None

More thanminimum, but not inevery tier

YesReduce density 20% from that ofminimum in-rack sprinklers

In every tier YesReduce density 40% from that ofminimum in-rack sprinklers

Over 20 ft (6.1 m)through 24 25 ft(7.5 m)

Minimum required No None

More thanminimum, but not inevery tier

NoReduce density 20% from that ofminimum in-rack sprinklers

In every tier NoReduce density 40% from that ofminimum in-rack sprinklers




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251 of 474 11/7/2013 12:33 PM

First Revision No. 209-NFPA 13-2013 [ Sections 16.2.1.3.4.7(A), 16.2.1.3.4.7(B) ]

(A)

The percentage shall be applied to the density determined in accordance with Figure16.2.1.3.4.1 16.2.1.3.4 .

(B)

The increase in density shall not apply where in-rack sprinklers are installed in accordance with Table16.2.1.3.4.3 utilized in the design .




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The previous edition language was vague and difficult to comprehend. Revisions wereeditorial to clarify the intent of these sections.

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Public Input No. 98-NFPA 13-2013 [Sections 16.2.1.3.4.7(A), 16.2.1.3.4.7(B)]


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16.1.8.4*

In-rack sprinklers shall be located at an intersection of transverse and longitudinal flues while notexceeding the maximum spacing rules.

(A)

Where distances between transverse flues exceed the maximum allowable distances, sprinklers shallbe installed at the intersection of the transverse and longitudinal flues and additional sprinklers shall beinstalled between transverse flues to meet the maximum distance rules.

(B)

Where no transverse flues exist, in-rack sprinklers shall not exceed the maximum spacing rules.



A16.1.8.4_FR315.docx



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This First Revision moves section 16.2.1.4.2.3 along with subsections A and B (and its associatedannex note) to a new section 16.1.8.4. Rewrite the section to only apply where in-rack sprinklers areinstalled within a longitudinal flue and delete redundant sections in Chapter 16. Note that thisconsolidates 19 sections into 3, which shortens the standard, but separates the spacing rules fromthe rules regarding where to put the sprinklers. The proposed consolidation increased requirementsfor some storage heights/arrangements without sufficient data to justify the change. The committeedid see the justification to eliminate redundant requirements that could be moved to the generalsection.

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253 of 474 11/7/2013 12:33 PM

A.16.1.8.4 In-rack sprinklers have proven to be the most effective way to fight fires in rack storage. To accomplish this, however, in-rack sprinklers must be located where they will operate early in a fire as well as direct water where it will do the most good. Simply maintaining a minimum horizontal spacing between sprinklers does not achieve this goal. This is because fires in rack storage develop and grow in transverse and longitudinal flues, and in-rack sprinklers do not operate until flames actually impinge on them. To assure early operation and effective discharge, in-rack sprinklers in the longitudinal flue of open-frame racks must be located at transverse flue intersections.


16.2.2.1.1

Protection of solid shelf racks with CMSA sprinklers at the ceiling shall be permitted where in-racksprinklers are installed in accordance with 16.1.6 . In-rack sprinklers shall be installed in every levelbelow the highest solid shelf.




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While developing the 2013 edition, the committee philosophically agreed that the use of CMSA andESFR sprinklers to protect solid shelf racks was acceptable as long as in-rack sprinklers wereinstalled, but this was not carried out consistently through the standard. This FR (along with others)attempts to clarify the situation by making it consistent throughout all CMSA and ESFR sections. Atthe same time, we need to clarify that if the solid shelves are not in the entire rack, that even theopen shelves below the solid shelves need the extra in-rack sprinklers because the ceiling sprinklerdischarge cannot get down through the rack structure.

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16.2.3.2

ESFR sprinklers shall not be permitted to protect storage on solid shelf racks unless the solid shelf racksare protected with in-rack sprinklers in accordance with 16.1.6.

16.2.3.2.1

Where solid shelves are used, in-rack sprinklers shall be installed in every level below the highest solidshelf.




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We have proposed the new second sentence to clarify what to do when the whole rack is notsolid shelves. Putting in-rack sprinklers just below the solid shelves is not sufficient if the solidshelves are blocking open racks farther below.

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Sub-Sections] ]



256 of 474 11/7/2013 12:33 PM

For single- and double-row racks, the water demand for nonencapsulated storage without solid shelvesseparated by aisles at least 4 ft (1.2 m) wide and with not more than a clearance to ceiling up to andincluding 10 ft (3.1 m) between the top of storage and the sprinklers shall be in accordance with Table16.3.1.1 .

Table 16.3.1.1 Single- or Double-Row Racks Without Solid Shelves of Class I Through Class IVCommodities Stored Over 25 ft (7.6 m) in Height with Aisles 4 ft (1.2 m) or More in Width

CommodityClass

In-Rack SprinklersApproximate Vertical

Spacing at TierNearest the Vertical

Distance andMaximum Horizontal

Spacinga,b,c

Figure

MaximumStorageHeight Stagger

CeilingSprinklerOperating

Area

Ceiling Sprink

to Ceiling U

OrdinaryTemperature

Longitudinal

Flued Facee,f ft2 m2 gpm/ft2 mm/m

I

Vertical 20 ft(6.1 m)

Horizontal 10ft (3.1 m)underhorizontalbarriers

None 16.3.4.1.1.1(a) 16.3.1.3.1.1(A)(a)30 ft (9.1m)

No

2000 186

0.25 10.2

Vertical 20 ft(6.1 m)Horizontal 10ft (3.1 m)

Vertical20 ft (6.1m)Horizontal10 ft (3.1m)

16.3.4.1.1.1(b) 16.3.1.3.1.1(A)(b)Higherthan 25 ft(7.6 m)

Yes 0.25 10.2

I, II, III

Vertical 10 ft(3.1 m) or at15 ft (4.6 m)and 25 ft (7.6m)

None 16.3.4.1.1.1(c) 16.3.1.3.1.1(A)(c)30 ft (9.1m)

Yes

2000 186

0.3 12.2


Horizontal 10ft (3.1 m)

Vertical30 ft (9.1m)

Horizontal10 ft (3.1m)

16.3.4.1.1.1(d) 16.3.1.3.1.1(A)(d)

Higherthan 25 ft(7.6 m)

Yes 0.3 12.2


Horizontal 10ft (3.1 m)



16.3.4.1.1.1(e) 16.3.1.3.1.1(A)(e) Yes 0.3 12.2


Horizontal 5 ft(1.5 m)



16.3.4.1.1.1(f) 16.3.1.3.1.1(A)(f) No 0.3 12.2

Horizontalbarriers at 20ft (6.1 m)

Vertical

16.3.4.1.1.1(g) 16.3.1.3.1.1(A)(g) Yes 0.3 12.2


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CommodityClass

In-Rack SprinklersApproximate Vertical

Spacing at TierNearest the Vertical

Distance andMaximum Horizontal

Spacinga,b,c

Figure

MaximumStorageHeight Stagger

CeilingSprinklerOperating

Area

Ceiling Sprink

to Ceiling U

OrdinaryTemperature

Longitudinal

Flued Facee,f ft2 m2 gpm/ft2 mm/m

aMinimum in-rack sprinkler discharge, 30 gpm (114 L/min).

bWater shields required.

cAll in-rack sprinkler spacing dimensions start from the floor.

dInstall sprinklers at least 3 in. (76.2 mm) from uprights.

eFace sprinklers shall not be required for a Class I commodity consisting of noncombustible products onwood pallets (without combustible containers), except for arrays shown in Figure 16.3.1.3.1.1(A)(g) andFigure 16.3.1.3.1.1(A)(j).

fIn Figure 16.3.1.3.1.1(A)(a) through Figure 16.3.1.3.1.1(A)(j), each square represents a storage cube thatmeasures 4 ft to 5 ft (1.2 m to 1.5 m) on a side. Actual load heights can vary from approximately 18 in. to10 ft (0.46 m to 3.1 m). Therefore, there can be one load to six or seven loads between in-rack sprinklersthat are spaced 10 ft (3.1 m) apart vertically.

gFor encapsulated commodity, increase density 25 percent.




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258 of 474 11/7/2013 12:33 PM


Sub-Sections] ]


For multiple-row racks, the water demand for nonencapsulated storage without solid shelves separatedby aisles at least 4 ft (1.2 m) wide and with not more than a clearance to ceiling up to and including 10 ft(3.1 m) between the top of storage and the sprinklers shall be in accordance with Table 16.3.1.2 .

Table 16.3.1.2 Multiple-Row Racks of Class I Through Class IV Commodities Stored Over 25 ft (7.6 m) inHeight

CommodityClass Encapsulated

In-Rack Sprinklersa,b,c

HeightLimit(ft) Stagger Figure

MaSpfro

Stto H

InSpr

MaximumVerticalSpacing

MaximumHorizontalSpacingin A Flue

MaximumHorizontalSpacingacross

Flue

ft m ft m ft m ft

INo

20 6.1 12 3.7 10 3.1

NoneBetweenadjacentflues

16.3.4.1.3.1(a) 16.3.1.3.1.3(A)(a) 10Yes

I, II, and IIINo

15 4.6 10 3.1 10 3.1 16.3.4.1.3.1(b) 16.3.1.3.1.3(A)(b) 10Yes

I, II, III, andIV

No10 3.1 10 3.1 10 3.1 16.3.4.1.3.1(c) 16.3.1.3.1.3(A)(c) 5

Yes

For SI units, °C = 5⁄9 (°F-32); 1 gpm/ft2 = 40.746 mm/min.

aAll four rack faces shall be protected by sprinklers located within the racks and no more than 18 in. (0.46m) from the faces, as indicated in Figure 16.3.1.3.1.3(A)(a) through Figure 16.3.1.3.1.3(A)(c). It shall notbe required for each sprinkler level to protect all faces.

bAll in-rack sprinkler spacing dimensions start from the floor.

cIn Figure 16.3.1.3.1.3(A)(a) through Figure 16.3.1.3.1.3(A)(c), each square represents a storage cubemeasuring 4 ft to 5 ft (1.2 m to 1.5 m) on a side. Actual load heights can vary from approximately 18 in. to10 ft (0.46 m to 3.1 m). Therefore, there could be as few as one load or as many as six or seven loadsbetween in-rack sprinklers that are spaced 10 ft (3.1 m) apart vertically.




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Committee Statement: Editorial change to correct references in the table.

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260 of 474 11/7/2013 12:33 PM


16.3.2.1.1





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16.3.2.2

Where in-rack sprinklers are required by Table 16.3.2.1, in-rack sprinkler spacing, design pressure, andhydraulic calculation criteria shall be in accordance with the requirements of 16.3.2.7 as applicable for thecommodity.




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CommitteeStatement:

The correction of the reference from 16.3.1.3 to 16.3.2.7 is important. The in-rack rules for whenCMSA sprinklers are at the ceiling are different than when standard spray sprinklers are at theceiling. The section on CMSA sprinklers needs to reference the in-rack rules for when CMSAsprinklers are at the ceiling, not the section where standard spray sprinklers are at the ceiling.

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16.3.3.1



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Protection of single-, double-, and multiple-row rack storage of Class I through Class IV commodities shallbe in accordance with Table 16.3.3.1 .

Table 16.3.3.1 ESFR Sprinkler Protection of Rack Storage Without Solid Shelves of Class I ThroughClass IV Commodities Stored Over 25 ft (7.6 m) in Height

StorageArrangement Commodity


MaximumCeiling/

RoofHeight

NominalK-Factor Orientation

MinimumOperatingPressure In-Rack

SprinklerRequirements

HoseStream

Allowanc

ft m ft m psi bar gpm L/m

Single-,double-, andmultiple-rowrack (noopen-topcontainers)

Class I, II, III, orIV, encapsulatedornonencapsulated

30 9.1

35 10.7

14.0

(200)Upright/pendent 75 5.2 No

250 94

16.8(240)

Upright/

pendent52 3.6 No

22.4

(320)Pendent 35 2.4 No

25.2(360)

Pendent 20 1.4 No

40 12.2

14.0(200)

Pendent 75 5.2 No

16.8(240)

Pendent 52 3.6 No

22.4


25.2(360)

Pendent 25 1.7 No

45 13.7

14.0(200)

Pendent 90 6.2 Yes

16.8(240)

Pendent 63 4.3 Yes

22.4


25.2(360)

Pendent 40 2.8 No

35 10.7

40 12.2

14.0(200)

Pendent 75 5.2 No

16.8(240)

Pendent 52 3.6 No

22.4


25.2(360)

Pendent 25 1.7 No

45 13.7

14.0(200)

Pendent 90 6.2 Yes

16.8(240)

Pendent 63 4.3 Yes

22.4



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MaximumCeiling/

RoofHeight

NominalK-Factor Orientation


In-RackSprinkler

Requirements

HoseStream

Allowanc

ft m ft m psi bar gpm L/m




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CommitteeStatement:

XL Global Asset Protection Services sponsored a single large-scale fire test on August 20, 2011 atUnderwriter's Laboratories to develop data regarding the level of protection provided by nominalK=14.0 gpm/psi 1/2 pendant ESFR ceiling sprinklers operating at a discharge pressure of 75 psi.The sprinklers were installed to protect a double row rack storage arrangement of cartoned Class IVtest commodity stored to 20 ft high under a 40 ft ceiling. The fire opened 18 sprinklers. A copy of thereport is available upon required.

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16.3.3.2.1


Protection of solid shelf racks with ESFR sprinklers at the ceiling shall be permitted where in-racksprinklers are installed in accordance with 16.1.6 . In-rack sprinklers shall be installed in every levelbelow the highest solid shelf.




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16.3.3.2

ESFR protection as defined shall not apply to the following:

(1) Rack storage involving solid shelves, except for situations complying with 16.3.3.2.1

(2) Rack storage involving combustible, open-top cartons or containers

16.3.3.2.1






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Committee Statement

CommitteeStatement:

For the solid shelf issue, a whole new section is being added to be consistent with decisions madein the 2013 cycle. With respect to the open-top container issue, it does not matter whether thecontainers are combustible or not. The fact that they are open top containers causes a problem. Thestandard already says in other places that the rules do not apply to open top containers. This sectionconfuses people because they think that ESFR sprinklers are a special exception that allows theprotection of non-combustible open top containers.

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17.1.2.1*

Plastic commodities shall be protected in accordance with Figure 17.1.2.1. (See Section C.21.)

Figure 17.1.2.1 Decision Tree.



17.1.2.1.docx rev Decision Tree




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Committee Statement

CommitteeStatement:

The decision tree is being revised so that it incorporates the design criteria for exposedexpanded group a plastics that have been added to 17.3.3.5.

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17.1.2.6

Sprinkler protection criteria for the storage of materials Group A plastic commodities on racks shall be inaccordance with Section 17.2 for storage up to 25 ft (7.6 m) and Section 17.3 for storage over 25 ft (7.6m).




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Committee Statement

CommitteeStatement:

As currently written it is unclear which sections in Chapter 17 are referring to plastic and rubbercommodities in general and which sections are speaking specifically to materials that fit the Group Aplastic classification. Section 17.1.2.6 is actually speaking to Group A plastics, as are all succeedingreferences to plastic throughout the rest of Chapter 17. For clarity, it should be specifically stated.

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17.1.4 Fire Protection of Steel Columns — Columns Within Storage Racks.

See Section C.10.

17.1.4.1*


Where fireproofing of building columns is not provided and storage heights are in excess of 15 ft (4.6 m),protection of building columns located wholly or partially within the rack structure or vertical rackmembers supporting the building footprint inclusive of flue space or within 12 in. (305 mm) of the footprintshall be protected in accordance with one of the following:

(1) In-rack sprinklers

(2) Sidewall sprinklers at the 15 ft (4.6 m) elevation, pointed toward one side of the steel column

(3) Provision of ceiling sprinkler density for a minimum of 2000 ft 2 (186 m 2 ) with ordinary temperature–or high temperature–rated sprinklers as shown in Table 17.1.4.1 for storage heights above 15 ft (4.6m) up to and including 20 ft (6.1 m)

(4) Provision of CMSA or ESFR ceiling sprinkler protection

Table 17.1.4.1 Ceiling Sprinkler Densities for Protection of Steel Building Columns

Commodity Classification

Aisle Width

4 ft (1.2 m) 8 ft (2.4 m)

gpm/ft2 (L/min)/m2 gpm/ft2 (L/min)/m2

Plastics Group A plastics 0.68 27.7 0.57 23.2

17.1.4.2

Where storage heights are in excess of 15 ft (4.6 m) and vertical rack members support the buildingstructure, the vertical rack members shall be protected in accordance with one of the options in17.1.4.1 .

17.1.4.3

The flow from a column sprinkler(s) shall be permitted to be omitted from the sprinkler system hydrauliccalculations.



Figure_A.17.1.4.1.docx Column protection ch 17

FR_299_Annex_Text.docx Annex Text




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CommitteeStatement:

Substantiation: The concept of “within the rack structure” needed to be better explained. There havebeen questions about whether columns in flue spaces, at the end of racks or in aisles are “within therack structure”. This revision answers the question by providing a consistent measurement point. Thedistance of 12 inches was selected as being half of the allowable width of a flue space. If there is aconcern that there is insufficient heat to open a sprinkler centered in a flue space more than 24inches wide, then a column in the same location (12 inches from the rack) should be acceptablewithout additional protection. The concept of rack supported structures was moved to a separatesection in order to make the base paragraph easier to understand without compound “or” phrases inthe section. The annex note along with the Figure help to show the concept pictorially for thosepeople that understand figures rather than text.

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Figure A.17.1.4.1 – Protection of Columns Within and Adjacent to Rack Structure

Column 4

A.17.1.4.1 Columns at the ends of racks or in the aisles need to be protected from the heat of a fire in the racks if they are near the racks. Columns within the flue spaces are already within the footprint of the racks and need protection. In Figure A.17.1.4.1, Column 1 is within the flue space and needs protection. Column 2 is within 12 in. (305 mm) of the rack and needs protection. Column 3 is more than 12 in. (305 mm) away from the rack and does not need protection even though it is in an aisle. A portion of Column 4 is within 12 in. (305 mm) of the rack and therefore requires sprinkler protection.

Figure A.17.1.4.1 Protection of Columns Within and Adjacent to Rack Structure.


17.1.7.4*

In-rack Where in-rack sprinklers are installed in longitudinal flues, they shall be located at an intersectionof transverse and longitudinal flues while not exceeding the maximum spacing rules.

17.1.7.4.1

Where distances between transverse flues exceed the maximum allowable distances, sprinklers shall beinstalled at the intersection of the transverse and longitudinal flues, and additional sprinklers shall beinstalled between transverse flues to meet the maximum distance rules.

17.1.7.4.2

Where no transverse flues exist, in-rack sprinklers shall not exceed the maximum spacing rules.

17.1.7.4.3

For storage over 25 ft in height, in-rack sprinklers in longitudinal flues shall be installed with the deflectorlocated at or below the bottom of horizontal load beams or above or below other adjacent horizontalrack members, and such in-rack sprinklers shall be a minimum of 3 in. (76 mm) radially from the side ofthe rack uprights.



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Committee Statement

CommitteeStatement:

Revision to revise 17.1.7.4 as follows and delete section 17.1.10.2.2 because it is redundant withsection 17.1.7.4, deleting redundant sections to 17.1.7.4 and add 17.1.7.4.3. The proposedconsolidation increased requirements for some storage heights/arrangements without sufficient datato justify the change. The committee did see the justification to eliminate redundant requirementsthat could be moved to the general section.

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17.2.1.1.1

For storage 5 ft (1.5 m) or less in height that does not meet the definition of Miscellaneous Storagethat is on solid shelf racks, in-rack sprinklers shall be provided in accordance with 17.1.5 , and ceilingsprinkler protection shall be provided in accordance with Chapter 13 .




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Committee Statement

CommitteeStatement:

Revisions have been created to Chapter 16 and 17 to require in-rack sprinkler protection forsolid shelf racks when the storage configuration is not miscellaneous storage. See FR 296 and297.

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17.2.1.2.1



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For Group A plastic commodities in cartons, encapsulated or nonencapsulated in single-, double-, andmultiple-row racks and with a clearance to ceiling up to and including 10 ft. (3.1 m) , ceiling sprinkler water

demand in terms of density [gpm/ft 2 (mm/min)] and area of operation [ft 2 (m 2 )] shall be selected fromFigure 17.2.1.2.1(a) through Figure 17.2.1.2.1(f) .

Figure 17.2.1.2.1(a) Storage 5 ft to 10 ft (1.5 m to 3.1 m) in Height with Up to 10 ft (3.1 m)Clearance to Ceiling.

Figure 17.2.1.2.1(b) Storage 15 ft (4.6 m) in Height with Up to 10 ft (3.1 m) Clearance to Ceiling.

Figure 17.2.1.2.1(c) Storage 20 ft (6.1 m) in Height with <5 ft (1.5 m) Clearance to Ceiling.


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Figure 17.2.1.2.1(d) Storage 20 ft (6.1 m) in Height with 5 ft to 10 ft (1.5 m to 3.1 m) Clearance toCeiling.


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Figure 17.2.1.2.1(e) Storage 25 ft (7.6 m) in Height with <5 ft (1.5 m) Clearance to Ceiling. (SeeNote 2.)

Figure 17.2.1.2.1(f) Storage 25 ft (7.6 m) in Height with 5 ft to 10 ft (1.5 m to 3.1 m) Clearance toCeiling. (See Note 2.)


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FR_217.pdf




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CommitteeStatement:

This is an editorial correction to update Note 2 of Figures 17.2.1.2.1 (b) through (f) replacing"sprinklers listed for storage use" with "control mode density/area sprinklers." As the terminologyhas evolved through the years, this note was not adjusted. Therefore, it needs this clarification.

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17.2.1.4*



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Exposed unexpanded Group A plastics protected with control mode density/area sprinklers shall beprotected in accordance with one of the following:

(1) Maximum 10 ft (3 m) storage in a maximum 20 ft (6.1 m) high building with ceiling sprinklers

designed for a minimum 0.8 gpm/ft 2 (32.6 mm/min) density over 2500 ft 2 (232 m 2 ) and no in-racksprinklers required as shown in Figure 17.2.1.4(a)

(2) Maximum 10 ft (3 m) storage in a maximum 20 ft (6.1 m) high building with ceiling sprinklers

designed for a minimum 0.45 gpm/ft 2 (18.3 mm/min) density over 2000 ft 2 (186 m 2 ) and one levelof in-rack sprinklers required at alternate transverse flues as shown in Figure 17.2.1.4(b)

(3) Maximum 10 ft storage in a maximum 20 ft high building with ceiling sprinklers designed for a

minimum 0.3 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(c)


minimum 0.45 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required at alternatetransverse flues as shown in Figure 17.2.1.4(d)


minimum 0.3 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(e)


minimum 0.6 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required at alternatetransverse flues as shown in Figure 17.2.1.4(f)


minimum 0.45 gpm/ft 2 density over 2000 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(g)


minimum 0.8 gpm/ft 2 density over 1500 ft 2 and one level of in-rack sprinklers required at alternatetransverse flues as shown in Figure 17.2.1.4(h)


minimum 0.6 gpm/ft 2 density over 1500 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(i)


minimum 0.3 gpm/ft 2 density over 2000 ft 2 and two levels of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(j)


minimum 0.8 gpm/ft 2 density over 1500 ft 2 and one level of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(k)


minimum 0.3 gpm/ft 2 density over 2000 ft 2 and two levels of in-rack sprinklers required in everytransverse flue as shown in Figure 17.2.1.4(l)

Figure 17.2.1.4(a) Exposed Nonexpanded Plastics Group A Plastic up to 10 ft in Height in up to a20 ft High Building with No In-Rack Sprinklers.


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Figure 17.2.1.4(b) Exposed Nonexpanded Plastics Group A Plastic up to 10 ft in Height in up to a20 ft High Building with One Level of In-Rack Sprinklers.

Figure 17.2.1.4(c) Exposed Nonexpanded Group A Plastics up to 10 ft in Height in up to a 20 ftHigh Building with One Level of Closely Spaced In-Rack Sprinklers.


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Figure 17.2.1.4(d) Exposed Nonexpanded Group A Plastics up to 15 ft in Height in up to a 25 ftHigh Building with One Level of In-Rack Sprinklers.

Figure 17.2.1.4(e) Exposed Nonexpanded Group A Plastics up to 15 ft in Height in up to a 25 ftHigh Building with One Level of Closely Spaced In-Rack Sprinklers.


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Figure 17.2.1.4(f) Exposed Nonexpanded Group A Plastics up to 20 ft in Height in up to a 25 ftHigh Building with One Level of In-Rack Sprinklers.


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Figure 17.2.1.4(g) Exposed Nonexpanded Group A Plastics up to 20 ft in Height in up to a 25 ftHigh Building with One Level of Closely Spaced In-Rack Sprinklers.

Figure 17.2.1.4(h) Exposed Nonexpanded Group A Plastics up to 20 ft in Height in up to a 30 ftHigh Building with One Level of In-Rack Sprinklers.


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Figure 17.2.1.4(i) Exposed Nonexpanded Group A Plastics up to 20 ft in Height in up to a 30 ftHigh Building with One Level of Closely Spaced In-Rack Sprinklers.

Figure 17.2.1.4(j) Exposed Nonexpanded Group A Plastics up to 20 ft in Height in up to a 30 ftHigh Building with Two Levels of Closely Spaced In-Rack Sprinklers.


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Figure 17.2.1.4(k) Exposed Nonexpanded Group A Plastics up to 25 ft in Height in up to a 35 ftHigh Building with One Level of Closely Spaced In-Rack Sprinklers.

Figure 17.2.1.4(l) Exposed Nonexpanded Group A Plastics up to 25 ft in Height in up to a 35 ftHigh Building with Two Levels of Closely Spaced In-Rack Sprinklers.


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17-2-1-4-f.tiff

FR_218_edits.pdf




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Committee Statement

CommitteeStatement:

The correct Figure 17.2.1.4(f) should only have in-rack sprinklers at every other flue space. This isthe advantage to going to the 0.6 density at the ceiling. With in-rack sprinklers at every flue space,the 0.45 density of Figure 17.2.1.4(g) would be applicable. Note that the figure with the in-racksprinklers every other flue space was originally submitted to the committee in the ROC for the 2013edition, but somewhere in the re-drafting, the in-rack sprinklers were increased.

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17.2.2.1.1





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Committee Statement

CommitteeStatement:

While developing the 2013 edition, the committee philosophically agreed that the use of CMSA andESFR sprinklers to protect solid shelf racks was acceptable as long as in-rack sprinklers wereinstalled, but this was not carried out consistently through the standard. This FR(along with others)attempts to clarify the situation by making it consistent throughout all CMSA and ESFR sections. Atthe same time, we need to clarify that if the solid shelves are not in the entire rack, that even theopen shelves below the solid shelves need the extra in-rack sprinklers because the ceiling sprinklerdischarge cannot get down through the rack structure.

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Sub-Sections] ]




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Protection of single-, double-, and multiple-row rack storage of cartoned or exposednonexpanded unexpanded Group A plastic and cartoned expanded Group A plastic shall be inaccordance with Table 17.2.3.1 .

Table 17.2.3.1 ESFR Protection of Rack Storage Without Solid Shelves of Plastics Group A PlasticCommodities Stored Up to and Including 25 ft (7.6 m) in Height



MaximumCeiling/Roof

HeightNominalK-Factor Orientation

MinimumOperatingPressure In-Rack

SprinklerRequirementft m ft m psi bar

Single-,double-, andmultiple-rowracks (noopen-topcontainers)

Cartonednonexpanded unexpanded

20 6.1

25 7.6

14.0(200)

Upright/

pendent50 3.4 No

16.8(240)

Upright/

pendent35 2.4 No

22.4


25.2


30 9.1

14.0

(200)

Upright/

pendent50 3.4 No

16.8

(240)

Upright/

pendent35 2.4 No

22.4


25.2


35 10.7

14.0

(200)

Upright/

pendent75 5.2 No

16.8

(240)

Upright/

pendent52 3.6 No

22.4


25.2


40 12.2

16.8


22.4


25.2


45 13.7

14.0

(200)Pendent 90 6.2 Yes

16.8


22.4


25.2



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MaximumCeiling/Roof



In-RackSprinkler

Requirementft m ft m psi bar



17.2.3.1_FR312.pdf



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CommitteeStatement:

This section of the table is redundant with the 20 ft. storage max. with a max. 30 ft ceiling, whichalready permits the k-14 and k-16.8 options. There is no technical change being made to the table,these revisions are intended to reduce the redundancies in the table.

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17.2.3.1.2





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CommitteeStatement:


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17.2.3.1.1

ESFR protection as defined shall not apply to the following:

(1) Rack storage involving solid shelves, except for the situation permitted by 17.2.3.1.2

(2) Rack storage involving combustible, open-top cartons or containers




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Committee Statement

CommitteeStatement:

For the solid shelf issue, we are referencing a new section that will be added to be consistent withthe decisions made in the 2013 cycle to allow ESFR sprinklers at the ceiling to protect solid shelveswhere in-rack sprinklers are installed. With respect to the open-top container issue, it does not matterwhether the containers are combustible or not. The fact that they are open top containers causes aproblem. The standard already says in other places that the rules do not apply to open topcontainers. This section confuses people because they think that ESFR sprinklers are a specialexception that allows the protection of non-combustible open top containers.

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17.3.1.8*


For protection of storage of exposed nonexpanded unexpanded Group A plastics, whether encapsulatedor nonencapsulated, or cartoned Group A plastics, expanded or nonexpanded unexpanded , whetherencapsulated or nonencapsulated, on multiple-row racks, in-rack sprinklers shall be arranged inaccordance with one of the options in Figure 17.3.1.8(a) through Figure 17.3.1.8(f) . The highest level ofin-rack sprinklers shall be not more than 10 ft (3.1 m) below the top of storage.

Figure 17.3.1.8(a) In-Rack Sprinkler Arrangement, Cartoned Group A Plastic and ExposedNonexpanded Group A Plastic, Multiple-Row Racks, Storage Height Over 25 ft (7.6 m) — Option1 [10 ft (3.1 m) Maximum Spacing].

Figure 17.3.1.8(b) In-Rack Sprinkler Arrangement, Cartoned Group A Plastic and ExposedNonexpanded Group A Plastic, Multiple-Row Racks, Storage Height Over 25 ft (7.6 m) — Option2 [10 ft (3.1 m) Maximum Spacing].

Figure 17.3.1.8(c) In-Rack Sprinkler Arrangement, Cartoned Group A Plastic and ExposedNonexpanded Group A Plastic, Multiple-Row Racks, Storage Height Over 25 ft (7.6 m) — Option1 [5 ft (1.5 m) Maximum Spacing].

Figure 17.3.1.8(d) In-Rack Sprinkler Arrangement, Cartoned Group A Plastic and UncartonedUnexpanded Group A Plastic, Multiple-Row Racks, Storage Height Over 25 ft (7.6 m) — Option 2[5 ft (1.5 m) Maximum Spacing].

Figure 17.3.1.8(e) In-Rack Sprinkler Arrangement, Cartoned Group A Plastic and ExposedNonexpanded Group A Plastic, Multiple-Row Racks, Storage Height Over 25 ft (7.6 m) — Option3 [5 ft (1.5 m) Maximum Spacing].

Figure 17.3.1.8(f) In-Rack Sprinkler Arrangement, Cartoned Group A Plastic and ExposedNonexpanded Group A Plastic, Multiple-Row Racks, Storage Height Over 25 ft (7.6 m) — Option4 [5 ft (1.5 m) Maximum Spacing].



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Figures_FR318.pdf



Organization: NFPA

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Submittal Date: Wed Oct 02 08:47:56 EDT 2013

Committee Statement

CommitteeStatement:

Editorial. Section 17.3.1.8 applies only to multiple-row racks. The elimination of the longitudinalflues creates consistency between all 6 of the figures in this section.

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17.3.2.1.1





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Committee Statement

CommitteeStatement:

While developing the 2013 edition, the committee philosophically agreed that the use of CMSA andESFR sprinklers to protect solid shelf racks was acceptable as long as in-rack sprinklers wereinstalled, but this was not carried out consistently through the standard. This public input (along withothers) attempts to clarify the situation by making it consistent throughout all CMSA and ESFRsections. At the same time, we need to clarify that if the solid shelves are not in the entire rack, thateven the open shelves below the solid shelves need the extra in-rack sprinklers because the ceilingsprinkler discharge cannot get down through the rack structure.

ResponseMessage:



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Sub-Sections] ]



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Protection of single-, double-, and multiple-row rack storage of cartoned or exposed,nonexpanded unexpanded Group A plastic shall be in accordance with Table 17.3.3.1 .

Table 17.3.3.1 ESFR Protection of Rack Storage Without Solid Shelves of Plastics Group A PlasticCommodities Stored Over 25 ft (7.6 m) in Height



MaximumCeiling/Roof



In-RackSprinkler

Requirementsft m ft m psi bar

Single-,double-, andmultiple-rowracks (noopen-topcontainers)

Cartonednonexpanded unexpanded

30 9.1

35 10.7

14.0

(200)

Upright/

pendent75 5.2 No

16.8

(240)

Upright/

pendent52 3.6 No

22.4


25.2


40 12.2

16.8


22.4


25.2


45 13.7

14.0


16.8


22.4


25.2


35 10.7

40 12.2

16.8


25.2


45 13.7

14.0


16.8


22.4


25.2


40 12.2 45 13.7

14.0


16.8



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MaximumCeiling/Roof



In-RackSprinkler

Requirementsft m ft m psi bar



FR_223_modifications.pdf Table 17.3.3.1




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Committee Statement: Incorrect metic conversion in the table was corrected.

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17.3.3.1.1

ESFR sprinklers shall not be permitted to protect storage on solid shelf racks unless the solid shelf racksare protected with in-rack sprinklers in accordance with 17.1.5. Where solid shelves are used, in-racksprinklers shall be installed in every level below the highest solid shelf.




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CommitteeStatement:

Guidance is needed for dealing with the situation where the whole rack is not solid shelves. Ifthere are open shelves below the solid shelves, they still need in-rack protection because the solidshelf is preventing water from getting down to the open shelves.

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17.3.3.5* Protection of Exposed Expanded Group A Plastics.

17.3.3.5.1

Protection of single-, double-, and multiple-row rack storage of exposed expanded Group A plasticsshall be permitted to be in accordance with 17.3.3.5.2 through 17.3.3.5.9 .

17.3.3.5.2

The maximum storage height shall be 35 ft (10.6 m).

17.3.3.5.3

The maximum ceiling height shall be 40 ft (12.2 m).

17.3.3.5.4

Sprinklers shall be intermediate temperature–rated ESFR pendent sprinklers with a nominal K-factor ofK-25.2 (360).

17.3.3.5.5

The design area shall consist of the most hydraulically demanding area of 15 sprinklers consisting offive sprinklers on each of three branch lines.

17.3.3.5.6

The minimum operating pressure shall be 60 psi (4.1 bar).

17.3.3.5.7

The hose stream allowance shall be 250 gpm (950) and the water supply duration shall be 60 minutes.

17.3.3.5.8

The minimum aisle width shall be 8 ft (2.4 m).

17.3.3.5.9

The rack shall have a solid vertical barrier of 3 ⁄8 in. (9.5 mm) plywood or particleboard, 22 gauge sheetmetal, or equivalent, from face of rack to face of rack, spaced at a maximum 16.5 ft (5.0 m) interval.

17.3.3.5.9.1

The vertical barrier shall extend from a maximum of 4 in. (102 mm) above the floor to the maximumstorage height.

17.3.3.5.9.2

The plan area of storage between vertical barriers and aisles shall not exceed 124 ft 2 (11.52 m 2 )

17.3.3.5.9.3

The vertical barrier shall extend across the longitudinal flue.

17.3.3.5.9.4

Commodity shall be permitted to extend a nominal 4 in. (102 mm) beyond the vertical barrier at theaisle.



A17.3.3.5_FR301.docx




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Committee Statement

CommitteeStatement:

New sprinkler system design criteria for exposed expanded plastics was included based upon thetest data included in a Fire Protection Research Foundation reports entitled “Protection of RackStored Exposed Expanded Group A Plastics with ESFR Sprinklers and Vertical Barriers” datedNovember 2012 and June 2013. The new criteria include design parameters and limitations that areconsidered to be appropriate based upon the testing conducted as a part of the FPRF research.

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A.17.3.3.5 The Fire Protection Research Foundation conducted a series of full-scale fire tests at Underwriters Laboratories to develop protection criteria for the rack storage of exposed expanded Group A plastic commodities. The tests are documented in the report, “Protection of Rack Stored Exposed Expanded Group A Plastics with ESFR Sprinklers and Vertical Barriers.” The criteria for exposed expanded plastics are based on Tests 2, 3, and 7 of the series, which investigated a 40 ft ceiling with a range of storage heights. The tests used K-25.2 intermediate-temperature ESFR sprinklers with vertical barriers attached to the rack uprights at nominal 16 ft apart. Vertical barriers of sheet metal and 3/8-in. plywood were both investigated. In Tests 1 through 6, transverse flue spaces between commodities were blocked. Comparing the results of Test 6 with blocked transverse flue spaces and Test 7 with no blocking of transverse flue spaces, the number of operated sprinklers decreased from 11 to 7 and improved suppression of the fire.

The area limitation between the vertical barriers and aisles indicated in 17.3.3.5.9.2 will limit the depth of a multiple-row rack arrangement. The hose stream allowance and water supply duration requirements considered the burning characteristics of the exposed expanded plastic commodity that generates a high rate of heat release very quickly, but the commodity involved in the combustion process is then quickly consumed after fire suppression or control is achieved.

While the resulting criteria is available to be used for ceiling heights up to 40 ft, more cost-efficient protection criteria could be available from other sources for ceiling heights of 30 ft and less. The research planning was based on the availability of design criteria from other sources for ceiling heights of 30 ft and less.



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18.4* Ceiling Systems.


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Sprinkler discharge and area of application shall be in accordance with one of the following:

(1) Table 18.4(a) or Table 18.4(b) for standard spray sprinklers

(2) Table 18.4(c) for CMSA sprinklers

(3) Table 18.4(d) for ESFR sprinklers

Table 18.4(a) Protection Criteria for Rubber Tire Storage Using Control Mode Density/Area Sprinklers

Piling Method

PileHeight

(ft)

Sprinkler Discharge

Density (gpm/ft2 over

ft2)

(see Note 1)

Areas of Application (ft2)

(see Note 1)

OrdinaryTemperature

HighTemperature

(see Note 1)

(1) On-floor storage Up to 5 0.19 2000 2000

(a) Pyramid piles, on-sideOver 5 to12

0.30 2500 2500

(b) Other arrangements such thatno horizontal channels are formed(see Note 2)

Over 12to 18

0.60 Not allowed 2500

(2) On-floor storage Up to 5 0.19 2000 2000

Tires, on-treadOver 5 to12

0.30 2500 2500

(3) Palletized portable rackstorage

Up to 5 0.19 2000 2000

On-side or on-tread

Over 5 to20

See Table 18.4(b) — —

Over 20to 30

0.30 plus high-expansionfoam

3000 3000

(4) Palletized portable rackstorage, on-side

Up to 5 0.19 2000 2000

Over 5 to20

See Table 18.4(b) — —

Over 20to 25

0.60 and Not allowed 5000

0.90 (see Note 3) or Not allowed 3000

0.75 with 1-hourfire-resistive rating of roofand ceiling assembly

Not allowed 4000

(5) Open portable rack storage,on-side or on-tread

Up to 5 0.19 2000 2000

Over 5 to12

0.60 5000 3000

Over 12to 20


0.90 (see Note 3) or Not allowed 3000


3000 3000

(6) Open portable rack storage,laced

Over 12to 20


0.90 (see notes 3 and 5) Not allowed 3000

(7) Single-, double-, andmultiple-row fixed rack storage onpallets, on-side, or on-treadwithout shelves

Up to 5 0.19 2000 2000

Over 5 to20

See Table 18.4(b) or 0.40plus one level in-racksprinklers or

3000 3000


3000 3000


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Piling Method

PileHeight

(ft)

Sprinkler Discharge

Density (gpm/ft2 over

ft2)

(see Note 1)

Areas of Application (ft2)

(see Note 1)

OrdinaryTemperature

HighTemperature

(see Note 1)

For SI units, 1 ft = 0.3048 m; 1 ft2 = 0.0929 m2; 1 gpm/ft2 = 40.746 mm/min.

Notes:

(1) Sprinkler discharge densities and areas of application are based on a maximum clearance to ceiling of10 ft (3.1 m) with the maximum height of storage anticipated.

(2) Laced tires on-floor, vertical stacking on-side (typical truck tires), and off-road tires. Laced tires are notstored to a significant height by this method due to the damage inflicted on the tire (i.e., bead).

(3) Water supply shall fulfill both requirements.

(4) Shelf storage of rubber tires shall be protected as solid rack shelving.

(5) This protection scheme is for use with K-16.8 (240) or larger control mode sprinklers only. Maximumclearance to ceiling can be increased to 14 ft (4.25 m) with this scheme.

Table 18.4(b) Control Mode Density/Area Sprinklers System Density (gpm/ft2 over ft2) for PalletizedPortable Rack Storage and Fixed Rack Storage of Rubber Tires with Pallets Over 5 ft (1.5 m) to 20 ft(6.1 m) in Height

Storage Height

(ft)

Sprinkler Temperature

High Temperature Ordinary Temperature

>5 to 10 0.32/2000 0.32/2000

>10 to 12 0.39/2000 0.39/2600

>12 to 14 0.45/2000 0.45/3200

>14 to 16 0.5/2300 0.5/3700

>16 to 18 0.55/2600 0.55/4400

>18 to 20 0.6/3000 0.6/5000

Table 18.4(c) Control Mode Specific Application (CMSA) Protection for Rubber Tires

PilingMethod


MaximumCeiling/Roof

Height K-FactorType ofSystem

Numberof

Sprinklers

OperatingPressure

HoseStream

Allowance

WaterSupply

Duration(hours)ft m ft m

Rubbertirestorage,on-sideoron-tread,inpalletizedportableracks, oropenportableracks, orfixedrackswithoutsolidshelves

25 7.6 32 9.8 11.2 (160) Wet 15

75 psi

(5.2 bar)

500 gpm

(1900L/min) 3

25 7.6 32 9.816.8(240) Wet 15

35 psi

(2.4 bar)

500 gpm(1900L/min) 3


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Table 18.4(d) Early Suppression Fast-Response (ESFR) Sprinklers for Protection of Rubber Tires (seeNote 1)

PilingMethod

PileHeight

MaximumBuildingHeight

NominalK-factor

OrientationNumber

ofSprinklers


(see Note2)

Duration(hours)

HoseAllowance

ft m psi bar gpm L/min

Rubbertirestorage,on-side oron-tread,inpalletizedportableracks,openportableracks, orfixed rackswithoutsolidshelves

Up to25 ft

(7.6 m)

30 9.1

14.0

(200)

Upright/

pendent

12

(see Note2)

50 3.5 1 250 946

16.8

(240)

Upright/

pendent

12

(see Note2)

35 2.4 1 250 946

22.4

(320)Pendent

12

(see Note2)

25 1.7 1 250 946

25.2(360)

Pendent

12

(see Note2)

15 1.0 1 250 946

Rubbertirestorage,on-side, inpalletizedportableracks,openportableracks, orfixed rackswithoutsolidshelves

Up to25 ft(7.6 m)

35 10.7

14.0

(200)

Upright/

pendent

12

(see Note2)

75 5.2 1 250 946

16.8

(240)Pendent

12

(see Note2)

52 3.6 1 250 946

22.4

(320)Pendent

12

(see Note2)

35 2.4 1 250 946

25.2(360)

Pendent

12

(see Note2)

25 1.7 1 250 946

On-tread,on-side,and lacedtires inopenportablesteel racksorpalletizedportableracks

Up to25 ft(7.6 m)

30 9.1

14.0

(200)Pendent

20

(see Notes3 and 4)

75 5.2 3 500 1900

16.8

(240)Pendent

20

(see Notes3 and 4)

52 3.6

Rubbertirestorage,on-side, inpalletizedportableracks

Up to25 ft(7.6 m)

40 12.2

14.0(200)

Pendent 12 75 5.2 1 250 946

16.8

(240)Pendent 12 52 3.6


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PilingMethod

PileHeight

MaximumBuildingHeight

NominalK-factor

OrientationNumber ofSprinklers


(see Note2)

Duration(hours)

HoseAllowance

ft m psi bar gpm L/min

Rubbertirestorage,on-tread,or laced inopenportablesteel racks

Up to25 ft

(7.6 m)40 12.2

25.2

(360)Pendent 12 40 2.8 1 250 946

On-tread,on-side,and lacedtires inopenportablesteel racksorpalletizedportableracks

Up to30 ft

(9.1 m)40 12.2

25.2

(360)Pendent 12 75 5.2 1 250 946

Notes:

(1) Wet systems only.

(2) The shape of the design area shall be in accordance with 14.4.3 and 14.4.4.

(3) Where used in this application, ESFR protection is expected to control rather than to suppress the fire.

(4) The design area shall consist of the most hydraulically demanding area of 20 sprinklers, consisting of

five sprinklers on each of four branch lines. The design shall include a minimum operating area of 1600 ft2

(149 m2).




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Committee Statement

CommitteeStatement:

The K-14 ESFR option has been deleted from the table. This is consistent with ROP13-397 fromthe previous cycle which intended to delete this option. The combination of high clearance with astorage height capable of generating strong fire plumes exist only at the 40 ft (12.2 m) ceiling heightfor the K14 (200) ESFR. Data has been provided to justify the restriction of K14 (200) ESFRsprinklers to maximum 35 ft (10.7) for ceiling only applications.

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19.1.2.3 Early Suppression Fast-Response (ESFR) Sprinklers for Protection of Roll Paper Storage.

Where automatic sprinkler system protection utilizes ESFR sprinklers, hydraulic design criteria shall be asspecified in Table 19.1.2.3. Design discharge pressure shall be applied to 12 operating sprinklers.

Table 19.1.2.3 ESFR Sprinklers for Protection of Roll Paper Storage (Maximum Height of StoragePermitted)

ESFRK-Factor Orientation

SystemType

PressureBuildingHeight

Heavyweight Mediumweight

TissueAll

Arrays

Closed Standard Open Closed Standard Open

psi bar ft m ft m ft m ft m ft m ft m ft m

14.0

(201)

Upright/

pendentWet 50 3.4

30 9.1 25 7.6 25 7.6 25 7.6 25 7.6 25 7.6 25 7.6 NA

16.8

(242)

Upright/

pendentWet 35 2.4

22.4

(322)Pendent Wet 25 1.7

25.2


14.0

(201)

Upright/pendent

Wet 75 5.2

35 10.7 30 9.1 30 9.1 30 9.1 NA NA NA NA16.8

(242)

Upright/

pendentWet 52 3.6

14.0(201)

Pendent Wet 75 5.2

40 12.2 30 9.1 30 9.1 30 9.1 NA NA NA NA

16.8


22.4


25.2


22.4


45 13.7 30 9.1 30 9.1 30 9.1 NA NA NA NA25.2


NA: Not applicable.




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Committee Statement

CommitteeStatement:

The K-14 ESFR option has been deleted from the table. This is consistent with ROP13-397 fromthe previous cycle which intended to delete this option. The combination of high clearance with astorage height capable of generating strong fire plumes exist only at the 40 ft (12.2 m) ceiling heightfor the K14 (200) ESFR. Data has been provided to justify the restriction of K14 (200) ESFRsprinklers to maximum 35 ft (10.7) for ceiling only applications.

ResponseMessage:


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20.2* Plastic Motor Vehicle Components.

Plastic Group A plastic automotive components and associated packaging material shall be permitted tobe protected in accordance with Table 20.2.

Table 20.2 ESFR Sprinkler Design Criteria K-25.2 (360) for Portable Racks (Closed Arraya) Without SolidShelves Containing Automotive Components

Commodity


MaximumCeiling/Roof

HeightType ofSystem

MaximumSprinkler

Spacingb

Numberof DesignSprinklers

byMinimumOperating

Pressurec

MaximumDeflectorDistance

Below

Ceilingd

HoseStream

Allowance

WaterSupply

Duration

(hours)

ft m ft m ft2 m2 psi bar in. mm gpm L/min

Automotivecomponentsandassociatedpackagingmaterial

25 7.6 35 10.7 Wet 100 9.3

16 at

37psi

16 at

2.5bar

18 457 500 1900 2

aPortable rack array shall be tightly nested without any flue spaces.

bSprinkler spacing can exceed 100 ft2 (9.3 m2 ) where sprinklers are listed for larger spacing.

cSystem hydraulic design shall also be capable of delivering a discharge density of 0.60 gpm/ft2 (24.4

mm/m)in) over the most hydraulically remote 4000 ft2 (372 m2) area.

dMaximum deflector distance below ceiling shall be permitted to exceed 18 in. (456 mm) where sprinklersare listed for greater distances.




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Committee Statement

CommitteeStatement:

This proposal is offered to correct a typographical error in 3.9.3.2, and for clarity. As per 5.6.4.4, itis only Group A plastics that are subdivided into expanded or nonexpanded categories, but aswritten, the text of 3.9.3.2, 20.2 and A.20.2 appears to be referring to all plastic classes.

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First Revision No. 226-NFPA 13-2013 [ Section No. 20.5.6.4 [Excluding any Sub-Sections] ]

20.5.6.4

Sprinklers shall be provided in transverse flue spaces in accordance with 20.5.6.4.1 through 20.5.6.4.3.1and Figure 20.5.6.4 .

Figure 20.5.6.4 Sprinkler Location and Spacing in Transverse Flues.

In-rack For double- and multiple-row racks, in-rack sprinklers shall be installed in the transverse fluesat each catwalk level and shall be staggered vertically. For single-row racks, in-rack sprinklers shallbe installed in the transverse flue at each catwalk level.

20.5.6.4.2

Sprinklers For double- and multiple-row racks sprinklers installed in the transverse flues shall be located notless than 18 in. (0.46 m) but not greater than 24 in. (0.61 m) from the face of the rack on the catwalk side .

20.5.6.4.3

For single-row racks, sprinklers installed in the transverse flues shall be staggered horizontally such that thesprinkler at first level is not less than 18 in. (0.46 m) but not greater than 24 in. (0.61 m) from the face of therack on the catwalk side.


20.5.6.4.3.1

At the next level the sprinkler in the transverse flue shall be located not less than 6 in. (0.15 m) but notgreater than 12 in. (0.30 m) from the back face of the rack. This staggering shall be repeated throughout allcatwalk levels.

20.5.6.4.4

In-rack sprinklers shall be installed a minimum 6 in. (150 mm) above the top of storage.

20.5.6.4.5

Transverse flue sprinklers shall be quick-response, ordinary temperature, nominal K-5.6 (80), K-8.0 (115), orK-11.2 (160) and installed in accordance with Figure A.20.5.6.3.5(a) and Figure A.20.5.6.3.5(b).



FR_226.pdf FR 226




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CommitteeStatement:

In many instances a single row rack is located against the wall of a records center. There is no directionon how to protect these single row racks so this section develops a means of providing protection that isconsistent with the means used for a double row rack. In rack sprinklers are provided at each catwalklevel within the flue. On the one level they are provided in accordance with the double row rack designand on the alternate level they are extended so that they are near the back face of the rack therebymaintaining the sprinkler vertical spacing called out for double row racks. This alternate level sprinkler isplaced closer to the back face so as to get some wetting on the back face itself. The sketch providesadditional guidance to the user on where the sprinklers are located when staggered.

ResponseMessage:



PLAN VIEW

Sprinkler on odd level

Sprinkler on even level

18-24"

10'-6" Max.

Transverse Flue Sprinkler

6-12"

First Revision No. 227-NFPA 13-2013 [ New Section after 21.1 ]

21.1.9

Listed storage sprinklers that are not specifically referenced in Sections 21.2 and 21.3 but are testedin accordance with Chapter 21 with system design criteria based upon Sections 21.1 , 21.4 , and21.5 shall be permitted to be used in accordance with their listing limitations, where approved.




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Committee Statement

CommitteeStatement:

As indicated by the Technical Committee action on Public Comment 13-303 for the 2013 Edition ofNFPA 13, the manufacturer has the option to submit their sprinkler for inclusion in this Chapter. Also,new products are routinely developed between editions of this standard. With the reference to certainsprinkler products in Chapter 21, there could be confusion as to whether sprinklers that are notreferenced in this chapter, but are tested as described herein, are permitted to be used. With this inmind, it is important to include a requirement indicating that sprinklers tested in accordance with thisChapter shall be permitted to be used when acceptable to the AHJ.

ResponseMessage:



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21.1.8.3

The design area and number of sprinklers calculated on a branch line shall be in accordance with23.4.4.2 using an area of sprinkler operation equal to the required number of operating sprinklers andthe maximum allowable coverage for the specific design criteria being utilized.




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Committee Statement

CommitteeStatement:

There is currently no guidance on how to establish the length and shape of the design area forthe criteria provided by Chapter 21. The proposed addition adds direction using the techniquesapplied in Chapter 23.

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21.2* Sprinkler Protection Design Criteria for Palletized, and Solid-Piled, Bin Box, Shelf, orBack-to-Back Shelf Storage of Class I Through Class IV and Plastic Commodities.

21.2.1


Protection of palletized and solid-piled storage of Class I through Class IV and cartonednonexpanded unexpanded plastic commodities shall be permitted to be protected in accordance withTable 21.2.1 .

Table 21.2.1 Extended Coverage, CMSA [K-factor 25.2 (360) Pendent ] Sprinkler Design Criteria forPalletized and Solid-Piled Storage of Class I Through Class IV and Cartoned Unexpanded PlasticCommodities

StorageArrangement Commodity Class


MaximumCeiling/Roof

Height

K-Factor/OrientationType ofSystem


MinimuOperatiPressuft m ft m

Palletized andsolid piled

Class I through IV andcartoned

nonexpanded unexpandedplastics

25 7.6 30 9.125.2 (360)

PendentWet 6

30 ps

(2.1 ba

30 9.1 35 10.625.2 (360)

PendentWet 8

40 ps

(2.8 ba


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21.2.2


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Protection of palletized and solid-piled storage of Class I through Class IV and plastic commodities shallbe permitted to be protected in accordance with Table 21.2.2 .

Table 21.2.2 Palletized, Solid-Piled, Bin Box, Shelf, or Back-to-Back Shelf Storage of Class I ThroughClass IV and Cartoned Unexpanded Plastic Commodities

StorageArrangement

CommodityClass


MaximumCeiling/Roof

HeightK-Factor/

OrientationType ofSystem

Numberof Design

Sprinklers


MaximumCoverage

AreaS

Alloft m ft m

Palletized,solid-piled, binbox, shelf, orback-to-backshelf storage

Class I throughClass IV,encapsulatedandunencapsulated,and cartonednonexpandedplastics

20 6.1 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi

(2.1 bar)

12 ft × 12ft

(3.7 m ×3.7 m)

144 ft 2

(13.4

m 2 )

25(950

20 6.1 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi

(2.1 bar)

14 ft × 14ft

(4.3 m ×4.3 m)

196 ft 2

(18.2

m 2 )

25(950

25 7.6 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi

(2.1 bar)

12 ft × 12ft

(3.7 m ×3.7 m)

25(950

25 7.6 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi

(2.1 bar)

14 ft × 14ft

(4.3 m ×4.3 m)

196 ft 2

(18.2

m 2 )

25(950

25 7.6 35 11

25.2 (360)Upright/

pendent

Wet 840 psi

(2.8 bar)

12 ft × 12ft

(3.7 m ×3.7 m)

144 ft 2

(13.4

m 2 )

25(950

25 7.6 35 1125.2 (360)

UprightWet 8

40 psi

(2.8 bar)

14 ft × 14ft

(4.3 m ×4.3 m)

196 ft 2

(18.2

m 2 )

50(L

30 9.1 35 11

25.2 (360)Upright/

pendent

Wet 840 psi

(2.8 bar)

12 ft × 12ft

(3.7 m ×3.7 m)

25(950


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StorageArrangement

CommodityClass


MaximumCeiling/Roof

HeightK-Factor/


Numberof Design

Sprinklers


MaximumCoverage

AreaS

Alloft m ft m



FR_229.pdf edits




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Committee Statement

CommitteeStatement:

The revisions to section 21.2 and the associated tables eliminate a significant amount ofredundancy. Hose stream and duration columns were deleted since this required is address in Table21.4.1. Extended coverage sprinklers utilizing Fast Response or Standard Response elements areall in the standard response category. The testing associated with the referenced sprinkler did notinclude bin box or shelf storage, therefore these arrangements are not considered in the tables.

ResponseMessage:

Public Input No. 374-NFPA 13-2013 [Sections 21.2.1, 21.2.2]








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21.3* Sprinkler Protection Criteria for Open-Frame Rack Storage of Class I Through Class IV and PlasticCommodities.


Protection of single-, double-, and multiple-row racks without solid shelves of Class I through Class IV andcartoned nonexpanded unexpanded plastic commodities shall be permitted to be protected in accordancewith Table 21.3 .

Table Table 21.3 Extended Coverage, CMSA [K-Factor 25.2 (360) Pendent ] Sprinkler Design Criteria forSingle-, Double-, and Multiple-Row Racks Without Solid Shelves of Class I Through Class IV andCartoned Unexpanded Plastic Commodities

StorageArrangement

Commodity Class


MaximumCeiling/Roof

HeightK-Factor/

Orientation

Type ofSystem



MaxiCove

Arft m ft m

Single-,double-, andmultiple-rowracks withoutsolid shelves(no open-topcontainers)

Class I through lV andcartoned

nonexpanded unexpandedplastics

25 7.6 30 9.125.2 (360)

PendentWet 6

30 psi

(2.1 bar)

14 ft f

(4.3 4.3

30 9.1 35 10.625.2 (360)

PendentWet 8

40 psi

(2.8 bar)

12 ft f

(3.7 3.7


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21.3.2


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Protection of open-frame rack storage of Class I through Class IV and plastic commodities shall bepermitted to be protected in accordance with Table 21.3.2 .

Table 21.3.2 Sprinkler Protection Criteria for Open-Frame Rack Storage of Class I Through Class IVand Cartoned Unexpanded Plastic Commodities

StorageArrangement

CommodityClass


MaximumCeiling/Roof

HeightK-Factor/


Numberof Design

Sprinklers


MaximumCoverage

AreaS

Alloft m ft m

Sprinklerprotectioncriteria foropen-framerack storage

Class I throughClass IV,encapsulatedandunencapsulated,and cartonednonexpandedplastics

20 6.1 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi (2.1

bar)

12 ft × 12ft

(3.7 m ×3.7 m)

144 ft 2

(13.4

m 2 )

25(950

20 6.1 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi (2.1

bar)

14 ft × 14ft

(4.3 m ×4.3 m)

196 ft 2

(18.2

m 2 )

25(950

25 7.6 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi (2.1

bar)

12 ft × 12ft

(3.7 m ×3.7 m)

144 ft 2

(13.4

m 2 )

25(950

25 7.6 30 9.1

25.2 (360)Upright/

pendent

Wet 630 psi (2.1

bar)

14 ft × 14ft

(4.3 m ×4.3 m)

196 ft 2

(18.2

m 2 )

25(950

25 7.6 35 11

25.2 (360)Upright/

pendent

Wet 840 psi (2.6

bar)

12 ft × 12ft

(3.7 m ×3.7 m)

144 ft 2

(13.4

m 2 )

25(950

25 7.6 35 1125.2 (360)

UprightWet 8

40 psi (2.6bar)

14 ft × 14ft

(4.3 m ×4.3 m)

196 ft 2

(18.2

m 2 )

50(L


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StorageArrangement

CommodityClass


MaximumCeiling/Roof

HeightK-Factor/


Numberof Design

Sprinklers


MaximumCoverage

AreaS

Alloft m ft m



FR_306.pdf




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Committee Statement

CommitteeStatement:

The revisions to section 21.3 and the associated tables eliminate a significant amount ofredundancy. Hose stream and duration columns were deleted since this required is address inTable 21.4.1. Extended coverage sprinklers utilizing Fast Response or Standard Responseelements are all in the standard response category.

ResponseMessage:









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23.3.5.1.2


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The data shall be presented in the order shown in Figure 23.3.5.1.2(a) through Figure 23.3.5.1.2(d).

Figure 23.3.5.1.2(a) Summary Sheet.

Figure 23.3.5.1.2(b) Graph Sheet.


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Figure 23.3.5.1.2(c) Supply and Node Analysis Sheet.

Figure 23.3.5.1.2(d) Detailed Worksheet.


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2016_NFPA_13_Summary_Sheet_Rev_2.doc New Summary Sheet NFPA 13




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CommitteeStatement:

The summary sheet was revised to be consistent with the revisions to FR-308 whichreferences the information that needs to be summarized.

ResponseMessage:


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Project General Information

Project name:_______________________________________________________ Date____/____/____

Location / address:____________________________________________________________________

Owner / occupant: _____________________________________________________________________

Installing contractor name: ______________________________________Phone # ( ) -

Installing contractor address: ____________________________________________________________

Designer: ____________________________________________________Phone # ( ) -

Authority having jurisdiction(s):__________________________________________________________

Design standard or document, including edition ______________________________________________

System Design Requirements

Design area name and number: __________________________________________________________

Design area location: ________________________________________ Drawing / sheet #: __________

Occupancy / hazard description: _________________________________________________________

___________________________________________________________________________________

Storage: (if applicable) Chap. 12-19: Commodity class:_______ Max. storage ht: ____ft Ceiling ht: ____ft For Group A: Expanded Nonexpanded Exposed Cartoned Stable Y/N Encapsulated: Y/N

Shelf: Back-to-Back Shelf Bin Box: Solid-pile: Palletized: Other: __________________

Rack: - If rack Single row: Double row: Multi-row: Solid Shelves Other: _____________

Aisle width: _____ft. Orientation: _______________ K-Factor: ________ Temp.: _________ In-racks: Y/N

Table and/or design curve used in design: _____________________________________________

System Type: Wet: Dry or Preaction: - Sys. volume: _______gal. Deluge: Antifreeeze: Other:

Sprinkler Type: Std Cov.: Extended Cov.: Residential: CMDA: CMSA: ESFR: Other:

Sprinkler Response: Quick Standard: Slope of roof or ceiling: ___________________ (riser/run)

Minimum rate of application: _____________gpm/ft2 Design area of application: _______________ft2

Coverage per sprinkler: _________________ ft2 Number of sprinklers calculated: __________

Limitations for extended coverage or special sprinklers: _______________________________________

___________________________________________________________________________________

Ceiling ht. if QR area reduction used: _______ft Elevation of highest calculated sprinkler: ________ft.

Total system demand @ source: ________________GPM @ ______________ psi

Hose allowance (inside / outside):_______ / ________gpm In-rack or other allowance: _________gpm

Water Supply Information

Date of test: _____/____/______ Time of test: ___:____ am /pm

Location of test hydrant: _________________________________________________________

Elevation of test hydrant relative to project finished floor: ______________ft

Location of flow hydrant(s): ______________________________________________________

Source of water for flow test: ___________________________________________________

Size of fire pump (GPM @ PSI): ________________ Size of water tank (gal): _____________

Notes: (include peaking of gridded system here)______________________________________________

____________________________________________________________________________________

23.3.5.2 Summary Sheet. The summary sheet as shown in Figure 23.3.5.1.2(a) shall contain the following information, where applicable:

1) Project name and date

2) Location (including street address)

3) Owner or expected occupant of space being designed.

4) Name, address and phone number of installing contractor

5) Name and phone number of designer

6) Authority having jurisdiction

7) Standard or document system is being designed to, including the edition of the document

8) Design area number and location

9) Drawing or sheet number where design area is located

10) Occupancy or commodity classification and information

11) For storage applications (including miscellaneous), additional information including storage height, ceiling height, storage configuration, aisle width, orientation of upright or pendent, sprinkler K-factor and sprinkler temperature, and the table and or curve utilized in the design

12) System type, including the system volume, type of preaction system should be indicated in the notes.

13) Sprinkler type, including coverage and response type.

14) Slope of roof or ceiling within the design area

15) System design requirements, as follows

a) Design area of application, ft2 (m2)

b) Minimum rate of water application (density), gpm/ft2 (mm/min)

c) Are per sprinkler, ft2 (m2)

d) Number of sprinklers calculated

16) Total water requirements as calculated, including allowance for inside hose, outside hydrants, water curtain, and exposure sprinklers, and allowance for in-rack sprinklers, gpm (L/min)

17) Ceiling height if used for quick response sprinkler reduction

18) Elevation of highest calculated sprinkler

19) Water supply information, including the following:

a) Date and time of test

b) Location of the test and flow hydrant(s)

c) Source of the water for the flow test

d) Elevation of the test hydrant relative to the finished floor

e) Size of fire pump, gpm @ psi

f) Size of on-site water tank

20) Notes that include peaking information for calculations performed by a computer program, type of preaction system, limitations (dimension, flow and pressure) on extended-coverage or other listed special sprinklers



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23.3.5.2 Summary Sheet.


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The summary sheet as shown in Figure 23.3.5.1.2(a) shall contain the following information, whereapplicable:

(1) Project name and date

(2) Location (including street address)

Drawing number

Remote area number

Remote area location

(3) Owner or expected occupant of space being designed

(4) Name, address, and phone number of installing contractor

(5) Name and phone number of designer

(6) Authority having jurisdiction

(7) Standard or document system is being designed to, including the edition of the document

(8) Design area number and location

(9) Drawing or sheet number where design area is located

(10) Occupancy or commodity classification and information

(11) For storage applications (including miscellaneous), additional information including storage height,ceiling height, storage configuration, aisle width, orientation of upright or pendent, sprinkler K-factorand sprinkler temperature, and the table and or curve utilized in the design

(12) System type, including the system volume with type of protection system indicated in the notes

(13) Sprinkler type, including coverage and response type.

(14) Slope of roof or ceiling within the design area

(15) System design requirements, as follows:

(a) Design area of water application, ft2 (m2)

(b) Minimum rate of water application (density), gpm/ft2 (mm/min)

(c) Area per sprinkler, ft2 (m2)

(d) Number of sprinklers calculated

(16) Total water requirements as calculated, including allowance for inside hose, outside hydrants, watercurtain, and exposure sprinklers, and allowance for in-rack sprinklers, gpm (L/min)

Type of system and, if dry or preaction, the volume of the system in gallons (liters)

(17) Ceiling height if used for quick response sprinkler reduction

(18) Elevation of highest calculated sprinkler

(19) Water supply information, including the following:

(a) Date and time of test

(b) Location of the test and flow hydrant(s)

(c) Source of the water for the flow test

(d) Elevation of the test hydrant relative to the finished floor

(e) Size of fire pump, gpm @ psi

(f) Size of on-site water tank

Name and address of installing contractor

Name of designer

Authority having jurisdiction

(20) Notes that include items such as peaking information for calculations performed by a computer


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program, type of preaction system, limitations (dimension, flow, and pressure) on extended-coverage or other listed special sprinklers, system type, including the system volume




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Committee Statement

CommitteeStatement:

The list of items to be included in the summary sheet has been expanded and revised to beconsistent with industries practices and what many AHJs are requiring as summary information.

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23.4.1.2

Pipe sizes shall be no less than 1 in. (25 mm) nominal for ferrous piping and 3⁄4 in. (20 mm) nominal forcopper tubing or nonmetallic piping listed for fire sprinkler service. unless permitted by 8.15.20.4 and8.15.20.5 .




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Committee Statement

CommitteeStatement:

You are currently permitted to use 1/2 inch and 3/4 inch pipe when revamping systems inaccordance with section 8.15.20.4. and 8.15.20.5. The section that limits pipe sizes needs torecognize the revamping rules. Editorial corrections to section numbers.

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23.4.1.4 Velocity Limitations.

Unless required by other NFPA standards, the velocity of water flow shall not be limited when hydrauliccalculations are performed using the Hazen Williams and/or Darcy Weisbach formulas.




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Committee Statement

CommitteeStatement:

A great deal of confusion exists among users of the standard where computer hydraulic calculationprograms show velocities in piping exceeding 32 fps. This is the result of long since retired ruleslimiting velocities in overhead and underground piping. Other NFPA standards (NFPA 20; NFPA 15do have velocity limits)

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23.4.4.2 Density/Area Method.

23.4.4.2.1*

Where the design is based on the density/area method, the design area shall be a rectangular areahaving a dimension parallel to the branch lines at least 1.2 times the square root of the area of sprinkleroperation (A) used, which shall permit the inclusion of sprinklers on both sides of the cross main.

23.4.4.2.2

Any fractional sprinkler shall be carried to the next higher whole sprinkler.

23.4.4.2.3

In systems having branch lines with an insufficient number of sprinklers to fulfill the 1.2 requirement, thedesign area shall be extended to include sprinklers on adjacent branch lines supplied by the same crossmain.

23.4.4.2.4*

Where the available floor area for a specific area/density design criteria, including any extension of areaas required by 11.1.2 and Section 12.3 , is less than the required minimum design area, the designarea shall be permitted to only include those sprinklers within the available design area.

23.4.4.2.5

Where the total design discharge from these operating sprinklers is less than the minimum requireddischarge determined by multiplying the required design density times the required minimum designarea, an additional flow shall be added at the point of connection of the branch line to the cross mainfurthest from the source to increase the overall demand, not including hose stream allowance, to theminimum required discharge.




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Committee Statement

Committee Statement: Renumbering subsection on density area for clarity. This should be its own section.

Response Message:


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23.4.4.3.3

In systems having branch lines with an insufficient number of sprinklers to fulfill the 1.2 requirement, thedesign area shall be extended to include sprinklers on adjacent branch lines supplied by the same crossmain.




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Committee Statement

CommitteeStatement:

The revised text was copied from 23.4.4.1.1.3 for application of the density / area method. Thisrequirement should apply to all design methods that call for the 1.2 requirement, such as forCMSA sprinklers.

ResponseMessage:



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Sub-Sections] ]


Where the design area is equal to or greater than the area in Table 23.4.4.7.2 for the hazard beingprotected by the sprinkler system, the discharge for sprinklers protecting small rooms compartments 55

ft 2 (5.1 m 2 ) or less, such as closets, washrooms, and similar small compartments that are in the designarea , shall be permitted to be omitted from the hydraulic calculations.

Table 23.4.4.7.2 Minimum Design Area

Occupancy HazardClassification

Minimum Design Area to Omit Discharge from Sprinklers in Small

Rooms Compartments in Design Area (ft2)

Light hazard–wet pipesystem 1500

Light hazard–dry pipesystem 1950

Ordinary hazard–wet pipesystem 1500

Ordinary hazard–dry pipesystem 1950

Extra hazard–wet pipesystem 2500

Extra hazard–dry pipesystem 3250




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Committee Statement

CommitteeStatement:

The confusion between the the use of the terms "small room" and small compartment are resolvedby modifying this 23.4.4.6.2.1 and the global input citing the appropriate replacement of the termsmall room with small compartment. Currently there is a definition for "small rooms" which is roomsnot exceeding 800 square feet. The size limitation for small rooms in determining whether to omitthese sprinklers from the design area needs to be defined. 800 is just too much. The 55 square footthreshold is a good starting point. if this size cannot be quantified then the exception should beremoved.

ResponseMessage:






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Sub-Sections] ]

The requirements of 23.4.4.7.1.1 to include every sprinkler in the design area shall not apply where spraysprinklers or CMSA sprinklers are provided above and below obstructions such as wide ducts or tables.




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Committee Statement

CommitteeStatement:

There is no longer any need to address spray sprinklers and CMSA sprinklers separately fromESFR sprinklers. This change also provides guidance on the pipe size for ESFR sprinklers belowobstructions.

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23.4.4.7.4

The requirements of 23.4.4.6.1.1 to include every sprinkler in the design area shall not apply whereESFR sprinklers are installed above and below obstructions.




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Committee Statement

CommitteeStatement:

Since the requirement to include in the hydraulic calculation additional sprinklers belowobstructions was deleted for ESFR sprinklers, there is no longer a need to have a separatesentence on ESFR. Additionally there is no guidance on sizing the pipe beneath the obstruction forESFR sprinklers (fixed by the linked PI)

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23.4.4.8.1

Pipe friction loss shall be calculated in accordance with the Hazen–Williams formula with C values fromTable 23.4.4.8.1, as follows:

(1) Include pipe Pipe , fittings, and devices such as valves, meters, flow switches in pipes 2 in. or less insize, and strainers shall be included , and calculate elevation changes that affect the sprinklerdischarge. shall be calculated.

(2) Tie-in drain piping shall not be included in the hydraulic calculations.

(3) Calculate the The loss for a tee or a cross shall be calculated where flow direction change occursbased on the equivalent pipe length of the piping segment in which the fitting is included.

(4) The tee at the top of a riser nipple shall be included in the branch line, the tee at the base of a risernipple shall be included in the riser nipple, and the tee or cross at a cross main–feed main junctionshall be included in the cross main.

(5) Do not include fitting Fitting loss for straight-through flow in a tee or cross. shall not be included.

(6) Calculate the The loss of reducing elbows based on the equivalent feet value of the smallest outlet.shall be calculated.

(7) Use the The equivalent feet value for the standard elbow on any abrupt 90-degree turn, such as thescrew-type pattern. shall be used.

(8) Use the The equivalent feet value for the long-turn elbow on any sweeping 90-degree turn, such asa flanged, welded, or mechanical joint-elbow type. shall be used. (See Table 23.4.3.1.1.)

(9) Friction loss shall be excluded for the fitting directly connected to a sprinkler.

(10) Losses through a pressure-reducing valve shall be included based on the normal inlet pressurecondition. Pressure loss data from the manufacturer's literature shall be used.

Table 23.4.4.8.1 Hazen–Williams C Values

Pipe or Tube C Value*

Unlined cast or ductile iron 100

Black steel (dry systems including preaction) 100

Black steel (wet systems including deluge) 120

Galvanized steel (dry systems including preaction) 100

Galvanized steel (wet systems including deluge) 120

Plastic (listed) all 150

Cement-lined cast- or ductile iron 140

Copper tube, Brass or stainless steel 150

Asbestos cement 140

Concrete 140

*The authority having jurisdiction is permitted to allow other C values.




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Committee Statement

Committee Statement: Since brass piping was added in the 2013 edition, guidance on the C Factor is needed.

Response Message:



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23.7.2.6*

Where the total number of sprinklers above and below a ceiling exceeds the number specified in Table23.7.2.2.1 for 21⁄2 in. (64 mm) pipe, the pipe supplying such sprinklers shall be increased to 3 in. (76 mm)and sized thereafter according to the schedule shown in Table 23.7.2.2.1 for the number of sprinklersabove or below a ceiling, whichever is larger.




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Committee Statement

CommitteeStatement:

The existing code section incorrectly references Table 23.5.2.2.1 instead of Table23.5.2.4.

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23.7.3.9*

Where the total number of sprinklers above and below a ceiling exceeds the number specified in Table23.7.3.7 for 3 in. (76 mm) pipe, the pipe supplying such sprinklers shall be increased to 31⁄2 in. (89 mm)and sized thereafter according to the schedule shown in Table 23.7.3.5 or Table 23.7.3.4 for the numberof sprinklers above or below a ceiling, whichever is larger.




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Committee Statement

CommitteeStatement:

The existing code section incorrectly references Table 23.5.2.2.1 instead of Table23.5.3.5.

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24.1.3.1

Except as provided in 24.1.3.2 or 24.1.3.3 , no pipe smaller than 6 in. (150 mm) in diameter shall beinstalled as a private service main.




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Committee Statement

Committee Statement: Additional reference for completeness.

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24.1.3.3


When For new systems to be supplied by a single main less than 4 in. (100 mm) in diameter serves ,which will serve both domestic and fire systems, the domestic demand shall be added to the hydrauliccalculations for the fire system at the point of connection unless provisions have been made to isolate thedomestic demand.




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Committee Statement

CommitteeStatement:

Clarification on the application on this requirement for new systems. This section is notintended to be applied retroactively.

ResponseMessage:


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24.1.6.1.2

The Where required due to specific mechanical or environmental conditions, the transition piece shall beprotected against possible damage from corrosive agents, solvent attack, or mechanical damage.




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Committee Statement

CommitteeStatement:

During the previous revision cycle, the intent of Proposal 13-86 and Comment 13-79 was to clarifythat it was acceptable to bring underground pipe into the building to specifically allow the transitionabove the floor, without having to make any special provisions. This clarification was lost however,when the TC amended the text that was offered, to address all piping and added the reference to24.1.6.1.2. . These changes provide the clarification as it was originally intended.

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25.2.1.4*


Modifications affecting 20 or fewer sprinklers to existing piping systems shall not require testing inexcess of system working pressure.




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Committee Statement

CommitteeStatement:

There is a great deal of confusion related the requirements for hydrostatic testing where systemsare modified. The revisions to 25.2.1.4 through 25.2.1.6 clarify the differences between additionsand modifications.

ResponseMessage:






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25.2.1.5

Where addition or modification is made additions are made to an existing system affecting more than 20sprinklers , the new portion shall be isolated and tested at not less than 200 psi (13.8 bar) for 2 hours.




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Committee Statement

Committee Statement: Clarifies that additions to existing systems require hydrostatic testing.

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A.25.2.1.4


Modifications that cannot be isolated, such as added or relocated drops for tenant improvements to anexisting system should not require testing in excess of system working pressure.




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Committee Statement

CommitteeStatement:

Provides support and clarification to requirements for hydrostatic testing where systemshave been modified.

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25.2.3.2.1

A working test of the dry pipe valve alone and with a quick-opening device, if installed, shall be made byopening the inspector's test connection.




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Committee Statement

CommitteeStatement:

The inclusion of the word "alone" has been leading AHJ's to require the dry-pipe valve to be triptested without the QOD and their pass/fail criteria of water delivery time was not being modified. Adry-pipe valve with a QOD cannot generally pass this test. By separating the requirement for thequick opening device to be tested, we hope that this clarifies that the test for both devices can beperformed at the same time.

ResponseMessage:




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25.2.3.2.4

The results shall be recorded using the contractor's material and test certificate for aboveground piping(see Figure 25.1) and the general information sign (see Figure A.25.6 ) .




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Committee Statement

CommitteeStatement:

Original test results should be posted on the General Information Placard for comparison tofuture trip test result comparison.

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25.2.3.4.2*

The static and residual pressures shall be recorded on the contractor's material and test certificate (seeFigure 25.1). and the sprinkler system general information placard (see Figure A.25.6 ) .




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Committee Statement

CommitteeStatement:

Main Drain Test results are required to be recorded on the General Information Sign. Thecharging paragraph should indicate this requirement in support of the required data.

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25.6.2

The sign shall include the following information:

(1) Name and location of the facility protected

(2) Occupancy classification

(3) Commodity classification

(4) Presence of high-piled and/or rack storage

(5) Maximum height of storage planned

(6) Aisle width planned

(7) Encapsulation of pallet loads

(8) Presence of solid shelving

(9) Flow test data

(10) Presence of flammable/combustible liquids

(11) Presence of hazardous materials

(12) Presence of other special storage

(13) Location of venting valve

(14) Location of auxiliary drains and low point drains on dry pipe and preaction systems

(15) Original results of main drain flow test

(16) Original results of dry pipe and double interlock preaction valve test

(17) Name of installing contractor or designer

(18) Indication of presence and location of antifreeze or other auxiliary systems

(19) Where injection systems are installed to treat MIC or corrosion, the type of chemical, concentration ofthe chemical, and where information can be found as to the proper disposal of the chemical




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Committee Statement

CommitteeStatement:

Original trip test data is needed for comparison to future trip tests as required by NFPA 25. Thelocation of the venting valve should be identified for maintenance purposes.

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First Revision No. 75-NFPA 13-2013 [ Section No. A.3.3.4 ]

A.3.3.4 Ceiling Pocket.

It is not the intent of this definition to be applied to structural and/or framing members otherwise used todefine obstructed or unobstructed construction. Ceiling pockets can be protected or unprotected. A ceilingpocket where the upper ceiling is within the allowable vertical distance from the sprinkler deflector shouldbe considered a protected ceiling pocket. Buildings with protected ceiling pockets are permitted to use the

quick-response reduction of 11.2.3.2.3. Buildings with unprotected ceiling pockets greater than 32 ft2(9.8

m 2 ) are not allowed to use the quick-response reduction of 11.2.3.2.3. An architectural ceiling featurethat consists of a bounded area of ceiling located at a higher elevation than the attached lower ceiling,and where the depth of the pocket is greater than the allowable distance, a sprinkler deflector can belocated from the higher ceiling elevation.




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Committee Statement

CommitteeStatement:

The additional annex language clarifies that where a sprinkler can be located in the lower ceilingand still meet the deflector distance rule, the upper ceiling should not be considered a ceilingpocket.

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A.3.7.1 Obstructed Construction.


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The following examples of obstructed construction are provided to assist the user in determining the typeof construction feature:

(1) Beam and Girder Construction. The term beam and girder construction as used in this standardincludes noncombustible and combustible roof or floor decks supported by wood beams of 4 in. (102mm) or greater nominal thickness or concrete or steel beams spaced 3 ft to 71⁄2 ft (0.9 m to 2.3 m) oncenter and either supported on or framed into girders. [Where supporting a wood plank deck, thisincludes semi-mill and panel construction, and where supporting (with steel framing) gypsum plank,steel deck, concrete, tile, or similar material, this includes much of the so-called noncombustibleconstruction.]

(2) Concrete Tee Construction. The term concrete tee construction as it is used in this standard refers tosolid concrete members with stems (legs) having a nominal thickness less than the nominal height.[See Figure A.3.7.1(a) for examples of concrete tee construction.]

(3) Composite Wood Joist Construction. The term composite wood joist construction refers to woodbeams of “I” cross section constructed of wood flanges and solid wood web, supporting a floor or roofdeck. Composite wood joists can vary in depth up to 48 in. (1.2 m), can be spaced up to 48 in. (1.2m) on centers, and can span up to 60 ft (18 m) between supports. Joist channels should befirestopped to the full depth of the joists with material equivalent to the web construction so that

individual channel areas do not exceed 300 ft2 (27.9 m2). [See Figure A.3.7.1(b) for an example ofcomposite wood joist construction.]

(4) Panel Construction. The term panel construction as used in this standard includes ceiling panelsformed by members capable of trapping heat to aid the operation of sprinklers and limited to a

maximum of 300 ft2 (27.9 m2) in area. There should be no unfilled penetrations in the cross-sectional area of the bounding structural members including the interface at the roof. Beams spacedmore than 71⁄2 ft (2.3 m) apart and framed into girders qualify as panel construction, provided the 300

ft2 (27.9 m2) area limitation is met.

(5) Semi-Mill Construction. The term semi-mill construction as used in this standard refers to a modifiedstandard mill construction, where greater column spacing is used and beams rest on girders.

(6) Wood Joist Construction. The term wood joist construction refers to solid wood members ofrectangular cross section, which can vary from 2 in. to 4 in. (51 mm to 102 mm) nominal width andcan be up to 14 in. (356 mm) nominal depth, spaced up to 3 ft (0.9 m) on centers, and can span upto 40 ft (12 m) between supports, supporting a floor or roof deck. Solid wood members less than 4 in.(102 mm) nominal width and up to 14 in. (356 mm) nominal depth, spaced more than 3 ft (0.9 m) oncenters, are also considered as wood joist construction. Wood joists can exceed 14 in. (356 mm) innominal depth.

(7) Bar Joist Construction with Fireproofing. In order to meet building codes, bar joists are often coveredwith fireproofing materials. In such an event, if greater than 30 percent of the area of the joist isobstructed, it should be considered obstructed construction.

(8) Steel Purlin Construction. This term refers to clear span or multiple span buildings with straight ortapered columns and frames supporting C- or Z-type purlins greater than 4 in. (102 mm) in depthspaced up to 71⁄2 ft (2.3 m) on center.

(9) Truss Construction (Wood or Steel). The term truss construction refers to parallel or pitched chordmembers connected by open web members supporting a roof or floor deck with top and bottommembers greater than 4 in. (102 mm) in depth. [See Figure A.3.7.2(c) .]

(10) Bar Joist Construction (Wood or Steel). The term bar joist construction refers to constructionemploying joists consisting of steel truss-shaped members. Wood truss-shaped members, whichconsist of wood top and bottom chord members with steel tube or bar webs, are also defined as barjoists. Bar joists include noncombustible or combustible roof or floor decks on bar joist constructionwith top and bottom chord members greater than 4 in. (102 mm) in depth. [See Figure A.3.7.2(a)and Figure A.3.7.2(b) for examples of bar joist construction.]

Figure A.3.7.1(a) Typical Concrete Tee Construction.


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Figure A.3.7.1(b) Typical Composite Wood Joist Construction.

Figure A.3.7.1(c) NEED CAPTION.



Figure_A3.7.1_c_.docx



Organization: NFPA


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Committee Statement

CommitteeStatement:

In 2013, section A.3.7.2(5) was changed to indicate that a truss with a chord less than 4 inches isunobstructed construction. This FR correlates with that clarification. Additionally terms were addedto the Obstructed Construction examples indicating a bar joist or truss with a chord greater than 4inches is obstructed construction. It is worth adding a picture that emphasizes that it is not the typeof structural member but depth of the portion that is tight to the ceiling that dictates the type ofconstruction.

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Figure A.3.7.1(c)



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A.3.7.2 Unobstructed Construction.


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The following examples of unobstructed construction are provided to assist the user in determining thetype of construction feature:

(1) Bar Joist Construction. The term bar joist construction refers to construction employing joistsconsisting of steel truss-shaped members. Wood truss-shaped members, which consist of wood topand bottom chord members with steel tube or bar webs, are also defined as bar joists. Bar joistsinclude noncombustible or combustible roof or floor decks on bar joist construction with top andbottom chord members not exceeding 4 in. (102 mm) in depth. [See Figure A.3.7.2(a) and FigureA.3.7.2(b) for examples of bar joist construction.]

(2) Open-Grid Ceilings. The term open-grid ceilings as used in this standard refers to ceilings in whichthe openings are 1⁄4 in. (6.4 mm) or larger in the least dimension, the thickness of the ceiling materialdoes not exceed the least dimension of the openings, and the openings constitute at least 70 percentof the ceiling area.

(3) Smooth Ceiling Construction. The term smooth ceiling construction as used in this standard includesthe following:

(a) Flat slab, pan-type reinforced concrete

(b) Continuous smooth bays formed by wood, concrete, or steel beams spaced more than 71⁄2 ft(2.3 m) on centers — beams supported by columns, girders, or trusses

(c) Smooth roof or floor decks supported directly on girders or trusses spaced more than 71⁄2 ft (2.3m) on center

(d) Smooth monolithic ceilings of at least 3⁄4 in. (19 mm) of plaster on metal lath or a combination ofmaterials of equivalent fire-resistive rating attached to the underside of wood joists, woodtrusses, and bar joists

(e) Open-web-type steel beams, regardless of spacing

(f) Smooth shell-type roofs, such as folded plates, hyperbolic paraboloids, saddles, domes, andlong barrel shells

(g) Suspended ceilings of combustible or noncombustible construction

(h) Smooth monolithic ceilings with fire resistance less than that specified under item(d) A.3.7.2(3)(d) and attached to the underside of wood joists, wood trusses, and bar joists

Combustible or noncombustible floor decks are permitted in the construction specified inA.3.7.2(3)(b) through (f) A.3.7.2(3)(f) . Item (b) A.3.7.2(3)(b) would include standard millconstruction.

(4) Standard Mill Construction. The term standard mill construction as used in this standard refers toheavy timber construction as defined in NFPA 220.

(5) Truss Construction (Wood or Steel). The term truss construction refers to parallel or pitched chordmembers connected by open web members supporting a roof or floor deck with top and bottommembers not exceeding 4 in. (102 mm) in depth. [See Figure A.3.7.2(c) .]

Figure A.3.7.2(a) Wood Bar Joist Construction.

Figure A.3.7.2(b) Open-Web Bar Joist Construction.


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Figure A.3.7.2(c) Examples of Wood Truss Construction.



A.3.7.2_c_updated_Figure.pdf Updated A.3.7.2(c)



Organization: NFPA

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Committee Statement

CommitteeStatement:

In 2013, section A.3.7.2(5) was changed to indicate that a truss with a chord less than 4 inches isunobstructed construction. This FR correlates with that clarification. Additionally terms were addedto the Obstructed Construction examples indicating a bar joist or truss with a chord greater than 4inches is obstructed construction. It is worth adding a picture that emphasizes that it is not the typeof structural member but depth of the portion that is tight to the ceiling that dictates the type ofconstruction.

ResponseMessage:


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First Revision No. 239-NFPA 13-2013 [ New Section after A.3.9.3.6 ]

A.3.9.3.8 Solid Shelving.

The placement of loads affects the calculated area of the shelf. It is the intent to apply this definition toloads on the rack where 6 in. (150 mm) nominal flues are not provided on all four sides, regardless ofwhether shelving materials are present.




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CommitteeStatement:

The new annex text is intended to provide direction to users of the standard that the unit loadimpacts the "openness" of the rack.

ResponseMessage:


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First Revision No. 231-NFPA 13-2013 [ Section No. A.3.9.3.7 ]


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A.3.9.3.7 Rack.


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Shelving in some rack structures use shelves that can be solid, slatted, or open. Racks can be fixed,portable, or movable. Loading can be either manual, using lift trucks, stacker cranes, or hand placement,or automatic, using machine-controlled storage and retrieval systems.

Rack storage as referred to in this standard contemplates commodities in a rack structure, usually steel.Many variations of dimensions are found. Racks can be single-, double-, or multiple-row, with or withoutsolid shelving. The standard commodity used in most of the tests was 42 in. (1.07 m) on a side.The Examples of the types of racks covered in this standard are as follows:

(1) Double-Row Racks. Pallets rest on two beams parallel to the aisle. Any number of pallets can besupported by one pair of beams. [See Figure A.3.9.3.7(a) through Figure A.3.9.3.7(d) .]

(2) Automatic Storage-Type Rack. The pallet is supported by two rails running perpendicular to the aisle.[See Figure A.3.9.3.7(e).]

(3) Multiple-Row Racks More Than Two Pallets Deep, Measured Aisle to Aisle. These racks includedrive-in racks, drive-through racks, flow-through racks, portable racks arranged in the same manner,and conventional or automatic racks with aisles less than 42 in. (1.07 m) wide. [See FigureA.3.9.3.7(f) through Figure A.3.9.3.7(i) .]

(4) Movable Racks. Movable racks are racks on fixed rails or guides. They can be moved back and forthonly in a horizontal, two-dimensional plane. A moving aisle is created as abutting racks are eitherloaded or unloaded, then moved across the aisle to abut other racks. [See Figure A.3.9.3.7(k) .]

Solid Shelving . Conventional pallet racks with plywood shelves on the shelf beams [see FigureA.3.9.3.7(c) and Figure A.3.9.3.7(d) ] . These racks are used in special cases. (See Chapter12 .)

(5) Cantilever Rack. The load is supported on arms that extend horizontally from columns. The load canrest on the arms or on shelves supported by the arms. [See Figure A.3.9.3.7(j) .]

Load depth in conventional or automatic racks should be considered a nominal 4 ft (1.22 m). [See FigureA.3.9.3.7(b).]

When catwalks are installed between racks, these areas are not to be considered flue spaces.

Figure A.3.9.3.7(a) Conventional Pallet Rack.

Figure A.3.9.3.7(b) Double-Row Racks Without Solid or Slatted Shelves.


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Figure A.3.9.3.7(c) Double-Row Racks with Solid Shelves.

Figure A.3.9.3.7(d) Double-Row Racks with Slatted Shelves.


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Figure A.3.9.3.7(e) Automatic Storage-Type Rack.

Figure A.3.9.3.7(f) Multiple-Row Rack Served by Reach Truck.


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Figure A.3.9.3.7(g) Flow-Through Pallet Rack.

Figure A.3.9.3.7(h) Drive-In Rack — Two or More Pallets Deep (Fork Truck Drives into Rack toDeposit and Withdraw Loads in Depth of Rack).


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Figure A.3.9.3.7(i) Flow-Through Racks (Top) and Portable Racks (Bottom).

Figure A.3.9.3.7(j) Cantilever Rack.


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Figure A.3.9.3.7(k) Movable Rack.




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Committee Statement

CommitteeStatement:

This section implies that Solid Shelving only consists of plywood shelves on the shelf beams, yetthe definition of solid shelving in Section 3.9.3.8 covers so much more. By definition solid shelvingcan be present even if there is no shelving material used at all so to define solid shelving asplywood is confusing and weakening the intent of Section 3.9.3.8.


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ResponseMessage:


Public Input No. 313-NFPA 13-2013 [New Section after A.3.9.3.7]


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A.5.3.1

Ordinary hazard (Group 1) occupancies include occupancies having uses and conditions similar to thefollowing:

(1) Automobile parking and showrooms

(2) Bakeries

(3) Beverage manufacturing

(4) Canneries

(5) Dairy products manufacturing and processing

(6) Electronic plants

(7) Glass and glass products manufacturing

(8) Laundries

(9) Restaurant service areas

(10) Porte cocheres

(11) Mechanical rooms with stockpiles up to 8 ft (2.4 m)




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CommitteeStatement:

Provides guidance for the user on how to protect and calculate porte cochere that arerequired to be sprinklered.

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First Revision No. 290-NFPA 13-2013 [ Section No. A.5.6 ]

A.5.6

Specification of the type, amount, and arrangement of combustibles for any commodity classification isessentially an attempt to define the potential fire severity, based on its burning characteristics, so the firecan be successfully controlled by the prescribed sprinkler protection for the commodity class. In actualstorage situations, however, many storage arrays do not fit precisely into one of the fundamentalclassifications; therefore, the user needs to make judgments after comparing each classification to theexisting storage conditions. Storage arrays consist of thousands of products, which make makes itimpossible to specify all the acceptable variations for any class. As an alternative, a variety of commonproducts are classified in this annex based on judgment, loss experience, and fire test results.

Table A.5.6 provides examples of commodities not addressed by the classifications in Section 5.6. Thecommodities listed in Table A.5.6 are outside of the scope of NFPA 13 protection.

Table A.5.6.3 is an alphabetized list of commodities with corresponding classifications.

Table A.5.6.3.1 through Table A.5.6.3.4 and Table A.5.6.4.1 provide examples of commodities within aspecific class.

Table A.5.6 Examples of Commodities Not Addressed by Classifications in Section 5.6

Ammunition components - Bulk Primers and powder

Boat Storage

- Stored on racks

Boxes, Crates

- Empty, wood slatted*

Carpet Rolls

Combustible Metals

Compressed or liquified flammable gases other than Level 1 aerosols

Explosives

Fireworks

Flammable and combustible liquids under the scope of NFPA 30

Hanging garments, bulk storage

Lighters (butane)

- Loose in large containers (Level 3 aerosol)

Storage Container

- Large container storage of household goods

*Should be treated as idle pallets.




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Submittal Date: Tue Sep 17 17:18:47 EDT 2013

Committee Statement


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CommitteeStatement:

The section has been updated to identify commodities that cannot be protected using NFPA13 protection schemes.

ResponseMessage:


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A.5.6.1.1


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Commodity classification is governed by the types and amounts of materials (e.g., metal, paper, wood,plastics) that are a part of a product and its primary packaging. However, in a storage or warehousingsituation, classification is also affected by such factors as the primary storage or shipping containermaterial, the amount of air space, and the location of the more hazardous materials within the container.For example, a Group A plastic product enclosed in a five- or six-sided metal container can be consideredClass II, while a ceramic product heavily wrapped in tissue paper and placed in a corrugated carton couldbe Class III. Consideration of all characteristics of the individual storage units, not just the product, iscritical to identify the appropriate commodity classification. Refer to Table A.5.6.1.1 for general guidancefor classifying commodities. For situations where it is difficult to determine the appropriate classification,testing should be considered to appropriately characterize the commodity.

Table A.5.6.1.1 General Guide to Identifying the Commodity Class

Characteristics of Unit Load Commodity

Class 1Material Used to Construct

ProductPackaging Material Pallet

Material

Noncombustible Product

Entirely noncombustibleNone or single layer corrugatedcartons

None, metalor wood

Class I

Entirely noncombustibleMultiple-layered corrugatedcartons, wooden crates orwood boxes

None, metalor wood

Class II

Noncombustible with Group A plasticcomponents

None or single layer corrugatedcartons

None, metalor wood

See Figure5.6.3.4.1

Entirely noncombustible ornoncombustible with plasticcomponents

Corrugated cartons, woodencrates or wood boxes, withplastic packaging

None, metalor wood

See Figure5.6.3.4.1

Entirely noncombustible ornoncombustible with plasticcomponents

Any type PlasticSee 5.6.2 andFigure 5.6.3.4.1

Wood, Paper, Natural Fibers orGroup C Plastics

Entirely wood, paper, natural fibers orGroup C plastics

None, corrugated cartons,wooden crates or wood boxes

None, metalor wood

Class III

Entirely wood, paper, natural fibers orGroup C plastics


None, metalor wood

See Figure5.6.3.4.1

Wood, paper, natural fibers or GroupC plastics, with Group A plasticcomponents

None, corrugated cartons,wooden crates or wood boxeswith or without plasticpackaging

None, metalor wood

See Figure5.6.3.4.1

Wood, paper, natural fibers or GroupC plastics, with or without Group Aplastic components

Any type PlasticSee 5.6.2 andFigure 5.6.3.4.1

Group B Plastics

Entirely Group B plastics or freeflowing plastic materials

None, corrugated cartons,wooden crates or wood boxes

None, metalor wood

Class IV

Entirely Group B plastics or freeflowing plastic materials


None, metalor wood

See Figure5.6.3.4.1

Group B plastics with Group A plasticcomponents

None, corrugated cartons,wooden crates or wood boxes,with or without plasticpackaging

None, metalor wood

See Figure5.6.3.4.1


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Characteristics of Unit Load Commodity

Class 1Material Used to Construct

ProductPackaging Material Pallet

Material

Note: This table provides guidance for the general characteristics to be considered in classifying acommodity. The additional commodity classification information included in this standard as well as anyrelevant test data that is available should be considered in identifying the appropriate classification.



Table_A.5.6.1.1.docx New Table A.5.6.1.1




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Committee Statement

CommitteeStatement:

A new table has been developed to assist in appropriately classifying commodities. The selectionof the appropriate classification is critical to the success of the system during a fire event. A notehas been added that where there is not a reasonable assurance of the appropriate class, testingshould be considered as means for determining the appropriate category.

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A.5.6.4

The categories listed in 5.6.4.1, 5.6.4.2, and 5.6.4.3 are based on unmodified plastic materials. The useof fire- or flame-retarding modifiers or the physical form of the material could change the classification.

The addition of fire retardants to plastic should not be relied upon as the sole basis for a reduction inclassification given the unknown performance of the fire retardant under a storage scenario. It isexpected that full-scale or commodity classification type testing would be necessary to justify any suchreduction in classification. No reduction in classification should be given for plastics simply because theycontain a fire retardant.

Plastic materials not specifically classified in 5.6.4 should be protected as Group A plastics unlessfull-scale or commodity classification type testing demonstrates otherwise. It is not possible to classifyfull-scale fire performance of plastics by looking solely at heat of combustion. Plastic materials should notbe categorized into a Group (A, B, or C) based upon comparing heat of combustion with values forplastics already classified in NFPA 13.




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CommitteeStatement:

New annex material has been added to address the use of fire retardants as a means for reducingcommodities. It is not the intent of the standard to permit derating of commodities based on theuse of these products unless testing can validate the revised classification.

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First Revision No. 67-NFPA 13-2013 [ New Section after A.6.1.1 ]

A.6.2.1.1

Sprinklers should be permitted to be reinstalled when the sprinkler being removed from the systemremains attached to the original fitting or welded outlet, provided care has been taken to ensure thesprinkler has not been damaged. Flexible hose connections are considered a fitting.

In new installations, where sprinklers are installed on pendent drop nipples or sidewall sprinklers prior tofinal cut-back, protective caps and/or straps should remain in place until after the drop nipple has beencut to fit to the final ceiling elevation.




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CommitteeStatement:

The concern of mechanical damage associated with removing sprinklers is applying torque on thesprinkler itself. Sprinklers that are removed by applying torque on a fitting can be reused. Specialrequirements addressing dry sprinklers have been added.

ResponseMessage:

Public Input No. 477-NFPA 13-2013 [New Section after A.6.1.1]


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A.6.1.1


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Included among items requiring listing are sprinklers, some pipe and some fittings, hangers, alarmdevices, valves controlling flow of water to sprinklers, valve tamper supervisory switches, and electricallyoperated solenoid valves, and gauges . Products are typically investigated in accordance with publishedstandards. Examples of standards used to investigate several products installed in sprinkler systems arereferenced in Table A.6.1.1. This table does not include a comprehensive list of all product standardsused to investigate products installed in sprinkler systems.

Table A.6.1.1 Examples of Standards for Sprinkler System Products

Category Standard

Sprinklers ANSI/UL 199, Automatic Sprinklers for Fire Protection Service

FM 2000, Automatic Control Mode Sprinklers for Fire Protection

ANSI/UL 1626, Residential Sprinklers for Fire Protection Service

FM 2030, Residential Automatic Sprinklers

ANSI/UL 1767, Early-Suppression Fast-Response Sprinklers

FM 2008, Suppression Mode ESFR Automatic Sprinklers

FM 1632, Telescoping Sprinkler Assemblies for Use in Fire Protection Systems forAnechoic Chambers

Valves ANSI/UL 193, Alarm Valves for Fire Protection Service

FM 1041, Alarm Check Valves

ANSI/UL 260, Dry Pipe and Deluge Valves for Fire Protection Service

FM 1021, Dry Pipe Valves

FM 1020, Automatic Water Control Valves

UL 262, Gate Valves for Fire Protection Service

FM 1120, 1130, Fire Service Water Control Valves (OS & Y and NRS Type GateValves)

ANSI/UL 312, Check Valves for Fire Protection Service

FM 1210, Swing Check Valves

UL 1091, Butterfly Valves for Fire Protection Service

FM 1112, Indicating Valves (Butterfly or Ball Type)

ANSI/UL 1468, Direct Acting Pressure Reducing and Pressure Restricting Valves

ANSI/UL 1739, Pilot-Operated Pressure-Control Valves for Fire Protection Service

FM 1362, Pressure Reducing Valves

FM 1011/1012/1013, Deluge and Preaction Sprinkler Systems

FM 1031, Quick Opening Devices (Accelerators and Exhausters) for Dry Pipe Valves

FM 1042, Waterflow Alarm Indicators (Vane Type)

FM 1045, Waterflow Detector Check Valves

FM 1140, Quick Opening Valves 1⁄4 Inch Through 2 Inch Nominal Size

Hangers ANSI/UL 203, Pipe Hanger Equipment for Fire Protection Service

FM 1951, 1952, 1953, Pipe Hanger Components for Automatic Sprinkler Systems

FM 1950, Seismic Sway Brace Components for Automatic Sprinkler Systems

Fittings ANSI/UL 213, Rubber Gasketed Fittings for Fire Protection Service

FM 1920, Pipe Couplings and Fittings for Fire Protection Systems

UL 1474, Adjustable Drop Nipples for Sprinkler Systems

FM 1631, Adjustable and Fixed Sprinkler Fittings 1⁄2 Inch through 1 Inch Nominal Size

ANSI/UL 2443, Flexible Sprinkler Hose with Fittings for Fire Protection Service

FM 1637, Flexible Sprinkler Hose with Fittings

Pressure Gages UL 393, Indicating Pressure Gauges for Fire Protection Service

FM 2311, Pressure Gauges for Fire Protection Systems


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Category Standard




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Committee Statement

CommitteeStatement:

Guages are no longer required to be Listed. The reference to such should be removed. Theterm "valve tamper" was updated for consistency with the remainder of the task group.

ResponseMessage:



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First Revision No. 69-NFPA 13-2013 [ Section No. A.6.3.1.1.1 ]

A.6.3.1.1.1

Extending the underground pipe such as ductile iron, C-900 PVC, and other pipe permitted by Chapter10 , into a building provides working room to transition to the appropriate aboveground piping.Environmental conditions should be considered as outlined in 24.1.6.1.2.




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Committee Statement

CommitteeStatement:

During the previous revision cycle, the intent of Proposal 13-86 and Comment 13-79 was to clarifythat it was acceptable to bring underground pipe into the building to specifically allow the transitionabove the floor, without having to make any special provisions. This clarification was lost however,when the TC amended the text that was offered, to address all piping and added the reference to24.1.6.1.2. These changes provide the clarification as it was originally intended. Additional languagewas provided to include additional piping materials permitted by ch 10.

ResponseMessage:

Public Input No. 302-NFPA 13-2013 [Section No. A.6.3.1.1.1]


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First Revision No. 272-NFPA 13-2013 [ Sections A.6.3.7, A.6.3.7.2, A.6.3.7.3 ]

A.6.3.7

CPVC is a plastic material, and consideration is necessary when other materials or chemicals come incontact with CPVC that can cause degradation of perfomance performance of the pipe due to interactionof materials. Other construction materials include but are not limited to materials used in fabrication of thesprinkler system, additives to water supplies, cable, and wiring, and certain insecticides and fungicides.Compliance with 6.3.7 combined with following the manufacturer’s guidance on installation andcompatible materials will help prevent premature performance degradation of CPVC non-metallic piping.Excessive mechanical Mechanical stress caused by hanging methods or excessive bending onCPVC non-metallic piping beyond the manufacturers recommended limitations can cause stress failureover time and should be avoided.

A.6.3.7.4

When fabricating steel pipe for a combination (CPVC–steel) system, the cutting oil and lubricants cancause performance degradation of the CPVC piping. Cutting oils and lubricants found to be compatibleare available and should be used.

A.6.3.7.3

Other construction materials include but are not limited to materials used in fabrication of the sprinklersystem, additives to water supplies, cable and wiring, and certain insecticides and fungicides.




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ResponseMessage:



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First Revision No. 273-NFPA 13-2013 [ Sections A.6.4.3.1, A.6.4.3.2 ]

A.6.4.3.1

CPVC is a plastic material and consideration is necessary when other materials or chemicals come incontact with CPVC that can cause degradation of perfomance performance of the fitting due to interactionof materials. Compliance with 6.4.3 combined with following manufacturer’s guidance on installation andcompatible materials will help prevent premature performance degradation of CPVC non-metallic fittings.Excessive mechanical Mechanical stress caused by hanging methods or excessive bending onCPVC non-metallic piping beyond the manufacturer's recommended limitations can cause stress failureover time and should be avoided.

A.6.4.3.2

When fabricating steel pipe for a combination (CPVC–steel) system using non-metallic and steel pipe ,the cutting oil and lubricants can cause performance degradation of the CPVC non-metallic fitting.Compatible cutting oils and lubricants are available and should be used.




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ResponseMessage:


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A.6.6

See Section 9.1 for information pertaining to the type of hangers and hanger components acceptablefor use on a sprinkler system.




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Committee Statement

Committee Statement: Section 6.6 was deleted, therefore the annex needs to be removed as well.

Response Message:


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A.6.9


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Table A.6.9 is a summary of the requirements for signs in NFPA 13.

Table A.6.9 Sprinkler System Signage Summary

Section Sign Location Sign Information/Requirements

6.7.4 Control valves Identification sign

Drain valves

Test connection valvesSign must be made of weatherproof metal or rigidplastic and attached with corrosion-resistant wire orchain

7.6.1.4 and7.6.1.5

Antifreeze system main valve Indicate the following:

Circulating closed loop systems Antifreeze manufacturer

Antifreeze type

Antifreeze concentration

7.7.1.5 All valves controlling sprinklers Sign worded as follows:

“This valve controls fire protection equipment.

Do not close until after fire has been extinguished.

Use auxiliary valves when necessary to shut offsupply to auxiliary equipment.

Caution: Automatic alarm may be sounded if thisvalve is closed.”

8.16.1.1.8 Control valves Indicate valve function

Indicate system being controlled

8.16.2.5.3.7 Dry valve Number of low point drains

Preaction valve Location of each drain

8.17.2.4.5Fire department connections notserving the whole building

Indicate portion of the building served by the firedepartment connection

8.17.2.4.7 All fire department connectionsIndicate systems served by the fire departmentconnection

Indicate system pressure demand (for systemsrequiring more than 150 psi)

Letters must be 1 in. in height

24.5 25.5 Alarm valve Indicate the following:

Dry pipe valve Location of the design area or areas

Preaction valve Discharge densities over the design area or areas

Deluge valve Required flow and residual pressure demand at thebase of the riser

Occupancy classification or commodity classificationand maximum permitted storage height andconfiguration

Hose stream allowance

The installing contractor

Sign must be made of weatherproof metal or rigidplastic and attached with corrosion-resistant wire orchain

24.6 25.6 System control riser Indicate the following:

Antifreeze loops Name and location of the facility

Auxiliary systems Occupancy and commodity classification

Control valves Flow test data


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Section Sign Location Sign Information/Requirements




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Committee Statement

CommitteeStatement:

corrected typo. Only 24.5 and 24.6 were modified but the program underlined all theexisting text.

Response Message:

Public Input No. 88-NFPA 13-2013 [Section No. A.6.10]


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First Revision No. 285-NFPA 13-2013 [ Sections A.7.6.1, A.7.6.2, A.7.6.2.1 ]

A.7.6.1

The definition of an antifreeze system states that water will discharge after the antifreeze leaves the pipes.Systems that are all antifreeze, including tanks of antifreeze solution that will not discharge plain water,are not true antifreeze systems. Such systems should not be used without consideration to issues such asthe combustibility of the antifreeze solution and the friction loss in the piping during cold conditions. Anylisting associated with an antifreeze sprinkler system should address the inability for the specific antifreezesolution tested to ignite when discharged from specific sprinklers.


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A.7.6.2


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Listed nonmetallic sprinkler pipe and fittings should be protected from freezing with compatible listedsolutions only. In addition, due to antifreeze solution limitations, other methods of freeze protection suchas electric heat tracing or insulated coverings, which are approved for use on nonmetallic piping, can beused to protect nonmetallic pipes from freezing.

The following is a list of research reports that have been issued by the Fire Protection ResearchFoundation (FPRF) related to the use of antifreeze in sprinkler systems:

(1) Antifreeze Systems in Home Fire Sprinkler Systems — Literature Review and Research Plan, FireProtection Research Foundation, June 2010

(2) Antifreeze Systems in Home Fire Sprinkler Systems — Phase II Final Report, Fire ProtectionResearch Foundation, December 2010

(3) Antifreeze Solutions Supplied through Spray Sprinklers — Interim Report, Fire Protection ResearchFoundation, February 2012

Table A.7.6.2 provides a summarized overview of the testing.

Table A.7.6.2 FPRF Antifreeze Testing Summary

Topic Information

Scope ofsprinklers tested

The following sprinklers were used during the residential sprinkler research programdescribed in the report dated December 2010: (1) Residential pendent style having

nominal K-factors of 3.1, 4.9, and 7.4 gpm/psi1/2

(2) Residential concealed pendent style having a nominal K-factor of 4.9 gpm/psi1/2

(3) Residential sidewall style having nominal K-factors of 4.2 and 5.5 gpm/psi1/2

The following sprinklers were used during the spray sprinkler research programdescribed in the report dated February 2012: (1) Residential pendent style having a

nominal K-factor of 3.1 gpm/psi1/2

(2) Standard spray pendent style having nominal K-factors of 2.8, 4.2, 5.6, and 8.0

gpm/psi1/2

(3) Standard spray concealed pendent style having a nominal K-factor of 5.6 gpm/psi1/2

(4) Standard spray upright style having a nominal K-factor of 5.6 gpm/psi1/2

(5) Standard spray extended coverage pendent style having a nominal K-factor of 5.6

gpm/psi1/2

Antifreezesolutionconcentration

<50% glycerine and <40% propylene glycol antifreeze solutions: Solutions were nottested.

50% glycerine and 40% propylene glycol antifreeze solutions: Large-scale ignition of thesprinkler spray did not occur in tests with sprinkler discharge onto a fire having anominal heat release rate (HRR) of 1.4 megawatts (MW). Large-scale ignition ofsprinkler spray occurred in multiple tests with sprinkler discharge onto a fire having anominal HRR of 3.0 MW.

55% glycerine and 45% propylene glycol antifreeze solutions: Large-scale ignition of thesprinkler spray occurred in tests with sprinkler discharge onto a fire having a nominalHRR of 1.4 MW.

> 55% glycerine and > 45% propylene glycol antifreeze solutions: Large-scale ignitionof the sprinkler spray occurred in tests with sprinkler discharge onto a fire having anHRR of less than 500 kW.

70% Glycerine and 60% propylene glycol antifreeze solutions: Maximum antifreezesolution concentrations tested.

Sprinkler inletpressure

Large-scale ignition of the sprinkler discharge spray was not observed when thesprinkler inlet pressure was 50 psi or less for tests using 50% glycerine or 40%propylene glycol.


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Topic Information

A.7.6.2.1

Where existing antifreeze systems have been analyzed and approved to remain in service, antifreezesolutions should be limited to premixed antifreeze solutions of glycerine (chemically pure or United StatesPharmacopoeia 96.5 percent) at a maximum concentration of 48 percent by volume, or propylene glycolat a maximum concentration of 38 percent by volume. The use of antifreeze solutions in all new sprinklersystems should be restricted to listed antifreeze solutions only. Where existing antifreeze systems are inservice, the solution concentration should be limited to those noted in A.7.6.2.1, and the system requiresan analysis and approval of the AHJ to remain in service.




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CommitteeStatement:

Note: This Proposal originates from Tentative Interim Amendment 13-13-1 (TIA 1066) issued by theStandards Council on August 9, 2012. The information provided in the Fire Protection ResearchFoundation report “Antifreeze Solutions Supplied through Spray Sprinklers: Interim Report” illustratesthat under certain conditions (pressure, fire size, k-factor, ceiling height, deflector design…etc) a 50%glycerine solution is capable of igniting and causing a dramatic increase in heat release rate. As notedin the FPRF report, these results highlight the “complicated interaction between sprinkler spray andthe ignition source.”As a result of this additional testing, there are more questions that need to beanswered, and the testing shows that concentrations of anti-freeze that previous testing indicated wereacceptable and would not support combustion actually do with a stronger ignition source. In addition,sprinklers with larger orifices that require lower pressure than typical residential sprinklers andpotentially a lager droplet distribution also ignited. It is clear that further testing is need to fullyunderstand under what conditions an anti-freeze solutions are safe, anti-freeze solutions can not beallowed in sprinkler systems. This TIA calls for the use of Listed Antifreeze Solutions. Using listedantifreeze solutions will ensure that the solution discharged from a sprinkler system will not ignite orcause a dramatic increase in heat release rate of a fire. The process for developing listed products willalso allow for a continued improvement in fire and life safety in environments meeting the NFPA Codesand Standards. This TIA also calls for the continued acceptance of currently listed ESFR AntifreezeSystems. The listing process has already shown that, in some cases, it is possible to use currentantifreeze solutions to provide the level of protection prescribed by NFPA 13. For this reason, it isproposed to allow the continued use of propylene-glycol solutions in systems and in protectionscenarios that have been thoroughly tested to demonstrate such results. There are ESFR systemscurrently available that have been specifically tested and listed with a specific model of sprinkler andsolution delivery method that provide an appropriate level of protection as to be considered “EarlySuppression”. Emergency Nature: The latest testing from The Fire Protection Research Foundationtitled Antifreeze Solutions Supplied through Spray Sprinklers Interim Report (dated February 2012)shows that anti-freeze concentrations currently allowed in new NFPA 13 sprinkler systems maysupport combustion and increase the size of the fire. This is a safety issue that requires changes in thestandard. The following are two items which make this TIA of emergency nature. Only one is requiredfor substantiation of an emergency nature. (d) The proposed TIA intends to offer to the public a benefitthat would lessen a recognized (known) hazard or ameliorate a continuing dangerous condition orsituation During the latest revision cycle the committee evaluated the test data that was present at thetime of the cycle. The committee could not anticipate that additional data would change ourjustifications during the process. The new data demonstrates that variables utilized in the developmentof the 2013 edition may lead to changes in the fire involvement. Propylene glycol and glycerinantifreeze solutions discharged from sprinklers have the potential to ignite under certain conditions.Research testing has indicated that several variables may influence the potential for large scale


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ignition of the antifreeze solution discharged from a sprinkler. These variables include, but are notlimited to, the concentration of antifreeze solution, sprinkler discharge characteristics, inlet pressure atthe sprinkler, location of fire relative to the sprinkler, and size of fire at the time of sprinkler discharge.(f ) The proposed TIA intends to correct a circumstance in which the revised document has resulted inan adverse impact on a product or method that was inadvertently overlooked in the total revisionprocess, or was without adequate technical (safety) justification for the action. Antifreeze solutionshave been subject to recent testing and the new data shows that the installations found within thestandard do not account for the complete safety of the occupant. The data appears to provideadditional questions and challenges the parameters of installation found in the standard. The use ofpropylene glycol and glycerin antifreeze solutions should only be considered when other sprinklersystem design alternatives are not available or practical. If these solutions are used, all relevant dataand information should be carefully reviewed and considered in the sprinkler system.

ResponseMessage:

Public Input No. 35-NFPA 13-2013 [Sections A.7.6.1, A.7.6.2, A.7.6.2.1]


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A.8.1.1

This standard contemplates full sprinkler protection for all areas including walk-in coolers, freezers, bankvaults, and similar areas. Other NFPA standards that mandate sprinkler installation might not requiresprinklers in certain areas. Based upon experience and testing, sprinklers have been found to be effectiveand necessary at heights in excess of 50 ft (15.2 m). For a building to meet the intended level ofprotection afforded by NFPA 13, sprinklers must not be omitted from such high ceiling spaces. Therequirements of this standard should be used insofar as they are applicable. The authority havingjurisdiction should be consulted in each case. A building is considered sprinklered throughout whenprotected in accordance with the requirements of this standard.

In situations such as computer rooms where a gas system is installed, the sprinkler protection should notbe eliminated. Many gas systems do not have the same duration requirements of a fire sprinkler system,and if the fire is not extinguished with the initial discharge, the fire could grow large enough to overpowerthe sprinkler system.




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CommitteeStatement:

The importance of protecting all area is the purpose of this annex section. Some building codesindicate that sprinklers can be eliminated from rooms with gas systems. If the committee is seriousabout their desire to sprinkler all areas, then this reference to gas systems and computer rooms isneeded as this is the most common situation where sprinklers are omitted.

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A.8.3.2.5(1)

Areas used for hot yoga facilities, steam rooms, saunas, indoor areas containing hot tubs, and similarheated areas should be evaluated to determine the potential maximum ambient temperature beforeselection of sprinkler temperature rating to be installed in the space.




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CommitteeStatement:

The proposed languages provides a list of areas where consideration is needed to ensuresprinklers of the appropriate temperature ratings are installed in hot room spaces.

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A.8.5.5.1

See Figure A.8.5.5.1. for a representation of a typical spray sprinkler pattern.

NFPA 13 strives to minimize the effect of obstructions through the use of specific criteria in 8.5.5 ,8.6.5 , 8.7.5 , 8.8.5 , 8.9.5 , 8.10.6 , 8.10.7 , 8.11.5 , and 8.12.5 . The obstruction criteria forstorage sprinklers in 8.11.5 and 8.12.5 is the most stringent. For other types of sprinklers, dry spacescaused be obstructions such as columns and wall configurations will occur and can comply with thestandard. The general rules known as the "three-times rule" and the "four-times rule" define dry areas or"shadow areas" that are acceptable behind obstructions like columns and walls. Tests have shown thatthe larger the column, the larger the dry area behind the column will be and the longer it will take forsprinklers on the other side of the column to react to the fire behind the column. In a very largecompartment, the delay could become unacceptable. The delay in sprinkler response can be minimizedwith smaller columns, with smaller compartments, or by putting sprinklers on the other side of thecolumn.

Where offset walls create shadowed areas, the sprinkler does not appear to be significantly delayed inactivation. Tests have shown that once the sprinkler activates, water will not cover all areas behind theobstructions.

Figure A.8.5.5.1 Obstructions to Sprinkler Discharge Pattern Development for Standard Uprightor Pendent Spray Sprinklers.




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CommitteeStatement:

The revised text provides direction on the impact of obstructions and the creation ofshadow areas.


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Response Message:



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First Revision No. 131-NFPA 13-2013 [ Section No. A.8.6.4.1.2(5) ]

A.8.6.4.1.2(5)

For concrete joists spaced less than 3 ft (0.91 m) on center, the rules for obstructed construction shown in8.6.4.1.2 apply. For concrete tee construction with stems spaced less than 7 ft 6 in. (2.3 m) but more than3 ft (0.91 m) on center, the sprinkler deflector can be located at or above a horizontal plane 1 in. (25.4mm) below the bottom of the stems of the tees. This includes sprinklers located between the stems. [SeeFigure A.8.6.4.1.2(5) .]

Figure A.8.6.4.1.2(5) Typical Concrete Joist Construction.



FR_131.docx




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Committee Statement

Committee Statement: This figure does not supply a true graphic representation of a concrete tee.

Response Message:

Public Input No. 533-NFPA 13-2013 [Section No. A.8.6.4.1.2(5)]


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A.8.6.5.1.2

The intent of 8.6.5.1.2(3) is to apply to soffits that are located within the 18 in. (457 mm) plane from thesprinkler deflector. A soffit or other obstruction (i.e., shelf) located against a wall that is located entirelybelow the 18 in. (457 mm) plane from the sprinkler deflector should be in accordance with 8.6.5.3.3. (SeeFigure A.8.6.5.1.2.)

Figure A.8.6.5.1.2 Soffit/Obstruction Against Wall Greater Than 18 in. (457 mm) Below Deflector.




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Committee Statement

Committee Statement: The annex cannot include requirements.

Response Message:


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A.8.8.5.1.2

The intent of 8.8.5.1.2(3) is to apply to soffits that are located within the 18 in. (457 mm) plane from thesprinkler deflector. A soffit or other obstruction (i.e., shelf) located against a wall that is located entirelybelow the 18 in. (457 mm) plane from the sprinkler deflector should be in accordance with 8.8.5.3.2. (SeeFigure A.8.8.5.1.2.)

Figure A.8.8.5.1.2 Soffit/Obstruction Against Wall Greater Than 18 in. (457 mm) Below Deflector.




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Committee Statement

Committee Statement: This revision correlates with A.8.6.5.1.2(c).

Response Message:


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First Revision No. 161-NFPA 13-2013 [ New Section after A.8.12.3.1(3) ]

A.8.12.5

The obstruction rules of 8.12.5 have been primarily written to address horizontal obstructions likeducts and lights where the sprinkler needs to spray under the obstruction or get water both over andunder the obstruction. For vertical obstruction situations like columns where the water needs to get totwo sides of the obstruction, the guidance in 8.12.5 to keep the sprinklers at least 12 in. (305 mm)from obstructions up to 12 in. (305 mm) wide and to keep the sprinkler 24 in. (610 mm) fromobstructions over 12 in. (305 mm) to 24 in. (610 mm) wide can be used. For obstructions like columnsthat are more than 24 in. (610 mm) wide, a sprinkler should be placed on the opposite side of theobstruction while following the minimum and maximum spacing requirements of 8.12.2 .




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CommitteeStatement:

Guidance is needed to deal with vertical obstructions like columns. Without fire testing or ADDtesting, we have been reluctant to actually propose specific requirements for the body of thestandard. But some mention of the situation deserves to be in the annex.

ResponseMessage:

Public Input No. 391-NFPA 13-2013 [New Section after A.8.12.3.1(3)]


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A.8.12.5.3.3

For example, a 1 in. (25 mm) diameter conduit would need to be 3 in. (75 mm) from the nearest pipe orconduit to be considered as an individual obstruction. Otherwise, the pipes and/or conduits would beconsidered as a group when applying the obstruction criteria in 8.12.5.3.1 .




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CommitteeStatement:

This new annex section is related to the FR for a new Section 8.12.5.3.3. This is the examplefor the what is required by 8.12.5.3.3.

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First Revision No. 143-NFPA 13-2013 [ New Section after A.8.15.1.2.17 ]

A.8.15.1.3

Utilities and other building services can be located within the concealed spaces.




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CommitteeStatement:

There are many variables that need to be taken into account when determing the density forany specific scenario. The document gives guidance for making this determination.

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A.8.16.4.2.1

Being eposed to the outside atmosphere is not necessarily a corrosive environment. Types of locationswhere corrosive conditions can exist include bleacheries, dye houses, metal plating processes, animalpens, and certain chemical plants. If corrosive conditions are not of great intensity and humidity is notabnormally high, good results can be obtained by a protective coating of red lead and varnish or by usinga good grade of commercial acid-resisting paint. The paint manufacturer's instructions should be followedin the preparation of the surface and in the method of application.

Where moisture conditions are severe but corrosive conditions are not of great intensity, copper tube orgalvanized steel pipe, fittings, and hangers might be suitable. The exposed threads of steel pipe should bepainted.

In instances where the piping is not accessible and where the exposure to corrosive fumes is severe,either a protective coating of high quality can be employed or some form of corrosion-resistant materialused.




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CommitteeStatement:

Many AHJ's consder piping installed with exposure to the outside atmosphere to be installed in acorrosive environment. Inland installations should not be considered corrosive environments. Redlead and varnished are no longer used, so this was struck from the annex section.

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A.8.16.6

A manual or automatic air venting valve can be a reasonable approach on wet pipe sprinkler systems toreduce corrosion activity. The purpose of the air venting valve is to exhaust as much trapped air aspossible from a single location every time the system is filled. The objective of venting is to reduce theamount of oxygen trapped in the system that will fuel corrosion and microbial activity. It is neither the intentnor practical to exhaust all trapped air from a single location on a wet pipe sprinkler system; however,more than one vent can be used on a system at the designer's discretion. Interconnection of branch linepiping for venting purposes is not necessary. An inspector's test valve can serve this purpose.

The air venting valve should be located where it will be most effective. System piping layout will guide thedesigner in choosing an effective location for venting. In order to effectively accomplish venting, it isnecessary to choose a location where the greatest volume of trapped air is vented during the first fill andeach subsequent drain and fill event. The vent connection to the system should be located off the top ofhorizontal piping at a high point in the system; however, the vent connection can also be effectivelylocated off the side of a riser or riser nipple at a high point in the system.

Manual air venting valves should be accessible. The manual air venting valve should be located at anaccessible point and preferably not over 7 ft (2 m) above the floor. Automatic air valves are not required tocomply with the accessibility requirement of manual air venting valves; however, it is recommended thedesigner locate automatic air vents over areas without ceilings, above a lay-in ceiling, or above an accesspanel.

Each wet pipe sprinkler system should be vented every time the system is filled.




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Committee Statement: Annex section relocated to be linked to new requirement for system venting.

Response Message:


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A.8.17.4.1

The purpose of this alarm test connection is to make sure the alarm device is sensitive enough todetermine the flow from a single sprinkler and sound an alarm. The purpose of this test connection is notto ensure that water will flow through the entire system.

When this test connection is installed on the upper story, and at the end of the most remote branch line,the user is able to tell that there is water flowing in one path through the system, but there is no assurancethat water will flow to other branch lines. Putting the test connection at the most remote portion of thesystem causes the introduction of fresh oxygen into a large part of the system each time the alarm istested and increases the corrosion that will occur in the piping.

The discharge should be at a point where it can be readily observed. In locations where it is not practicalto terminate the test connection outside the building, the test connection is permitted to terminate into adrain capable of accepting full flow under system pressure. In this event, the test connection should bemade using an approved sight test connection containing a smooth bore corrosion-resistant orifice givinga flow equivalent to one sprinkler simulating the least flow from an individual sprinkler in the system. [SeeFigure A.8.17.4.1(a) and Figure A.8.17.4.1(b).] The test valve should be located at an accessible pointand preferably not over 7 ft (2.1 m) above the floor. The control valve on the test connection should belocated at a point not exposed to freezing.

Figure A.8.17.4.1(a) System Test Connection on Wet Pipe System.

Figure A.8.17.4.1(b) Floor Control Valve. System Test Connection on Wet Pipe System.




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CommitteeStatement:

Section 8.17.4.2 is on wet pipe system test connections. Changed Figure title to reflect thesubject matter of this section.

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First Revision No. 38-NFPA 13-2013 [ New Section after A.9.1.1.5.3 ]

A.9.1.1.6.3

Other standards equivalent to ASTM A307 grades A or B include SAE J429 Grades 1 or 2. Bothfasteners are fabricated from low or medium carbon steel, and requirements have a minimum tensilestrength of 60 ksi.




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CommitteeStatement:

The annex reference provides examples of equivalent materials equivalent to ASTM A307fasteners.

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A.9.2.6

Examples include headers and horizontal runs of pipe that need support from the floor.

Where applicable, the design of pipe stands should consider additional loading from other sources.Environmental impacts, including water accumulation at the base, corrosion, and wind should also betaken into account as appropriate.

The performance of piping support systems should allow for expansion and contraction due totemperature change, expansion due to internal water pressure (thrust), restrained and/or unrestrainedjoints or pipe runs, heavy point loads (e.g., valves), and pipe deflection (span/support spacing).Manufacturer’s installation instructions and engineering design guides should be consulted whenavailable.

Examples of common applications include headers and horizontal runs of pipe that need support fromthe floor.




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A.9.3.1

Sprinkler systems are protected against earthquake damage by means of the following:

(1) Stresses that would develop in the piping due to differential building movement are minimizedthrough the use of flexible joints or clearances.

(2) Bracing is used to keep the piping fairly rigid when supported from a building component expected tomove as a unit, such as a ceiling.

Areas known to have a potential for earthquakes have been identified in building code and insurancemaps.

Displacement due to story drift is addressed in 9.3.2 through 9.3.4.

Piping in racks needs to be treated like other sprinkler piping and protected in accordance with the properrules. Piping to which in-rack sprinklers are directly attached should be treated as branch line piping.Piping that connects branch lines in the racks should be treated as mains. The bracing, restraint,flexibility, and requirements for flexible couplings are the same in the rack structures as at the ceiling.




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CommitteeStatement:

The standard needs some clarification on how to address piping in the racks. many people believethat they can ignore the protection rules because they are far from the building structure. They donot realize that the rack becomes the structure. This simple annex note should get them pointed inthe right direction

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First Revision No. 16-NFPA 13-2013 [ New Section after A.9.3.4 ]

A.9.3.4.10

Figure A.9.3.4.10 is an example of piping supported by structure where there is no clearance requiredat the point of contact between the piping and structure.

Figure A.9.3.4.10 Pipe with Zero Clearance.



clearance.jpg




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CommitteeStatement:

The intent of this section is to not require clearance at the point of clearance. The proposedfigure illustrates this point.

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A.9.3.5


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Figure A.9.3.5(a) and Figure A.9.3.5(b) are examples of forms used to aid in the preparation of bracingcalculations.

Figure A.9.3.5(a) Seismic Bracing Calculation Form.

Figure A.9.3.5(b) Sample Seismic Bracing Calculation Form.


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Figure_A.9.3.5_a_.G1369943847242.pdf

Figure_A.9.3.5_b_.G1369943881404-1.pdf




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CommitteeStatement:

The Figures in the 2013 edition do not indicate what main size and pipe type is used whenapplying section 9.3.5.5.2 and they don't have a place for the Structural Attachement Listed LoadRating and Adjusted Load Rating.

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A.9.3.5.9


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Location of Sway Bracing. Two-way braces are either longitudinal or lateral, depending on their orientationwith the axis of the piping. [See Figure A.9.3.5.9(a), Figure A.9.3.5.9(b), Figure A.9.3.5.9(c) , and FigureA.9.3.5.9(d).] The simplest form of two-way brace is a piece of steel pipe or angle. Because the bracemust act in both compression and tension, it is necessary to size the brace to prevent buckling.

An important aspect of sway bracing is its location. In Building 1 of Figure A.9.3.5.9(a), the relativelyheavy main will pull on the branch lines when shaking occurs. If the branch lines are held rigidly to the roofor floor above, the fittings can fracture due to the induced stresses. In selecting brace locations, one mustconsider both the design load on the brace, as well as the ability of the pipe to span between bracelocations.

Bracing should be on the main as indicated at Location B of Figure A.9.3.5.9(a) . With shaking in thedirection of the arrows, the light branch lines will be held at the fittings. Where necessary, a lateral braceor other restraint should be installed to prevent a branch line from striking against building components orequipment.

A four-way brace is indicated at Location A of Figure A.9.3.5.9(a) . This keeps the riser and main lined upand also prevents the main from shifting.

In Building 1 of Figure A.9.3.5.9(a) , the branch lines are flexible in a direction parallel to the main,regardless of building movement. The heavy main cannot shift under the roof or floor, and it also steadiesthe branch lines. While the main is braced, the flexible couplings on the riser allow the sprinkler system tomove with the floor or roof above, relative to the floor below.

Figure A.9.3.5.9(a) Typical Earthquake Protection for Sprinkler Main Piping.

Figure A.9.3.5.9(b) , Figure A.9.3.5.9(c), and Figure A.9.3.5.9(d) show typical locations of sway bracing.

Figure A.9.3.5.9(b) Typical Location of Bracing on Mains on Tree System.


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Figure A.9.3.5.9(c) Typical Location of Bracing on Mains on Gridded System.

Figure A.9.3.5.9(d) Typical Location of Bracing on Mains on Looped System.

For all threaded connections, sight holes or other means should be provided to permit indication thatsufficient thread is engaged.

To properly size and space braces, it is necessary to employ the following steps:

(1) Determine the seismic coefficient, Cp, using the procedures in 9.3.5.9.3 or 9.3.5.9.4 . This is

needed by the designer to verify that the piping can span between brace points. For the purposes ofthis example, assume that Cp = 0.5.

(2) Based on the distance of mains from the structural members that will support the braces, choose


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brace shapes and sizes from Table 9.3.5.11.8(a), Table 9.3.5.11.8(b), and Table 9.3.5.11.8(c) suchthat the maximum slenderness ratios, l/r, do not exceed 300. The angle of the braces from thevertical should be at least 30 degrees and preferably 45 degrees or more.

(3) Tentatively space lateral braces at 40 ft (12 m) maximum distances along mains, and tentativelyspace longitudinal braces at 80 ft (24 m) maximum distances along mains. Lateral braces shouldmeet the piping at right angles, and longitudinal braces should be aligned with the piping.

(4) Determine the total load tentatively applied to each brace in accordance with the examples shown inFigure A.9.3.5.9(e) and the following:

(a) For the loads on lateral braces on cross mains, add Cp times the weight of the branch to Cptimes the weight of the portion of the cross main within the zone of influence of the brace. [Seeexamples 1, 3, 6, and 7 in Figure A.9.3.5.9(e).]

(b) For the loads on longitudinal braces on cross mains, consider only Cp times the weight of the

cross mains and feed mains within the zone of influence. Branch lines need not be included.[See examples 2, 4, 5, 7, and 8 in Figure A.9.3.5.9(e).]

(c) For the four-way brace at the riser, add the longitudinal and lateral loads within the zone ofinfluence of the brace [see examples 2, 3, and 5 in Figure A.9.3.5.9(e) ]. For the four-waybracing at the top of the riser, Cp times the weight of the riser should be assigned to both the

lateral and longitudinal loads as they are separately considered.

(d) When a single brace has a combined load from both lateral and longitudinal forces (such as alateral brace at the end of a main that turns 90 degrees), only the lateral should be consideredfor comparison with the load tables in 9.3.5.5.2.

(5) If the total expected loads are less than the maximums permitted in Table 9.3.5.11.8(a), Table9.3.5.11.8(b), and Table 9.3.5.11.8(c) for the particular brace and orientation, and the maximumloads in the zone of influence of each lateral sway brace are less than the maximum values in Table9.3.5.5.2(a) or Table 9.3.5.5.2(b), go on to step (6) A.9.3.5.9 (6) . If not, add additional braces toreduce the zones of influence of overloaded braces.

(6) Check that fasteners connecting the braces to structural supporting members are adequate tosupport the expected loads on the braces in accordance with Figure 9.3.5.12.1. If not, again addadditional braces or additional means of support. Plates using multiple fasteners in seismicassemblies should follow the plate manufacturer guidelines regarding the applied loads.

Use the information on weights of water-filled piping contained within Table A.9.3.5.9. The factor of 1.15 isintended to approximate the additional weight of all the valves, fittings, and other devices attached to thesystem.

Figure A.9.3.5.9(e) Examples of Load Distribution to Bracing.

Table A.9.3.5.9 Piping Weights for Determining Horizontal Load

Nominal Dimensions Weight of Water-Filled Pipe

in. mm lb/ft kg/m

Schedule 40 Pipe

1 25 2.05 3.05

11⁄4 32 2.93 4.36

11⁄2 40 3.61 5.37


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Nominal Dimensions Weight of Water-Filled Pipe

in. mm lb/ft kg/m

2 50 5.13 7.63

21⁄2 65 7.89 11.74

3 80 10.82 16.10

31⁄2 90 13.48 20.06

4 100 16.40 24.41

5 125 23.47 34.93

6 150 31.69 47.16

8* 200 47.70 70.99

Schedule 10 Pipe

1 25 1.81 2.69

11⁄4 32 2.52 3.75

11⁄2 40 3.04 4.52

2 50 4.22 6.28

21⁄2 65 5.89 8.77

3 80 7.94 11.82

31⁄2 90 9.78 14.55

4 100 11.78 17.53

5 125 17.30 25.75

6 150 23.03 34.27

8 200 40.08 59.65

*Schedule 30.




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CommitteeStatement:

This revisions simply adds "or 9.3.5.9.4" to part (1) of the procedure. This is in keeping with therules of NFPA 13 regarding the determination of Cp.

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First Revision No. 34-NFPA 13-2013 [ Section No. A.9.3.5.9.6.1 ]

A.9.3.5.9.6.1

Where the C p is 1.0 or greater, the calculation should be done for any length riser nipple. The loads in

this condition can rapidly exceed the yield strength. Where steel Schedule 10 and Schedule 40 pipe areused, the section modules modulus can be found in Table 9.1.1.7.1(b).




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CommitteeStatement:

Typographic error to correct the term "modulus. A sentence clarifying that wherever CP is 1.0 orgreater was added to correlate with the the 3 exceptions to performing the calculation that wereadded to 9.3.5.9.6.1.

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Public Input No. 428-NFPA 13-2013 [Section No. A.9.3.5.9.6.1]


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A.9.3.5.11.1

Sway brace design and installation is critical to performance and requires attention to detail. Sway bracedesign parameters are dynamic and interdependent. Accordingly, seismic force is influenced bygeography, brace location is impacted by system design, and brace geometry is relative to the buildingstructure.

To enhance system durability and performance, sway brace installation should show evidence of goodcraftsmanship in conformance to approved drawings, correctly assembled and mounted at properangles on a plane that corresponds to the parallel and perpendicular axis of the system pipe.




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AHJ’s continue to request an appendix statement regarding sway brace installation Q.C. similar tothe hanger installation statement at A.9.2. This section was relocated to A.9.3.5.1.1 where it ismore appropriate as it is a general discuss about sway bracing QC.

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A.9.3.6.4

Modern seismic codes require branch lines to be restrained, both to limit interaction of the pipe with otherportions of the structure and to limit stresses in the pipes to permissible limits. The maximum spacingbetween restraints is dependent on the seismic coefficient, Cp, as shown in Table 9.3.6.4(a) . Table

9.3.6.4(a) has been limited to 2 in. (50 mm) lines and smaller, because branch lines 21⁄2 in. (65 mm) orlarger are required to be seismically braced.

It is not the intent of this section to require restraint of piping associated with valve trim, water motor gongpiping, air or nitrogen supply piping, or other piping that is not essential to the operation of the sprinklersystem. Essential piping such as fire pump sensing lines and diesel fuel lines are some examples ofsmall piping that should be restrained.




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CommitteeStatement:

This additional language was provided to highlight the difference between essential andnon-essential piping requiring restraint.

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A.9.3.7.8

Concrete anchors included in current Evaluation Service Reports conforming to the requirements ofacceptance criteria AC193 or AC308 as issued by ICC Evaluation Service, Inc. should be considered tomeet ACI 355.2, Qualification of Post-Installed Mechanical Anchors in Concrete & Commentary .




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The statement is taken from A.9.3.5.12.7.1. It is true for both hangers and braces usingconcrete anchors.

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A.9.3.8

When using pipe stand to support the gravity load of a water-based fire protection system in anearthquake area, care should be taken in planning the seismic protection. This includes close attentionto the differential movement between the system and the building or other components.




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A.12.1.3

The fire protection system design should consider the maximum storage height. For new sprinklerinstallations, maximum storage height is the usable height at which commodities can be stored above thefloor while the minimum required unobstructed space below sprinklers is maintained. Where evaluatingexisting situations, maximum storage height is the maximum existing storage height if space between thesprinklers and storage is equal to or greater than that required.

Building heights where baled cotton is stored should allow for proper clearance between the pile heightand sprinkler deflectors. Fire tests of high-piled storage have shown that sprinklers are generally moreeffective if located 11⁄2 ft to 41⁄2 ft (0.45 m to 1.4 m) above the storage height.

When the small higher hazard area is larger than the required minimum area dictated by the surroundingoccupancy, even when separated by partitions capable of stopping heat, the size of the operating area isdetermined by the higher hazard storage.




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Committee Statement: The final paragraph of A.12.1.3 was intended to be attached to A.12.3.

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A.12.3

The situation frequently arises where a small area of a higher hazard is surrounded by a lesser hazard.

For example, consider a 600 ft2 (55.7 m2) area consisting of 10 ft (3.05 m) high on-floor storage ofcartoned unexpanded plastic commodities surrounded by a plastic extruding operation in a 15 ft (4.57 m)high building. In accordance with Chapter 12, the density required for the plastic storage must meet therequirements for extra hazard (Group 1) occupancies. The plastic extruding operation should beconsidered an ordinary hazard (Group 2) occupancy. In accordance with Chapter 11, the corresponding

discharge densities should be 0.3 gpm/ft2 (12.2 mm/min) over 2500 ft2 (232 m2) for the storage and 0.2

gpm/ft2 (8.1 mm/min) over 1500 ft2 (139 m2) for the remainder of the area. (Also see Chapter 11 for therequired minimum areas of operation.)

If the storage area is not separated from the surrounding area by a wall or partition (see 11.1.2), the sizeof the operating area is determined by the higher hazard storage.

For example, the operating area is 2500 ft2 (232 m2). The system must be able to provide the 0.3 gpm/ft2

(12.2 mm/min) density over the storage area and 15 ft (4.57 m) beyond. If part of the remote area is

outside the 600 ft2 (55.7 m2) plus the 15 ft (4.57 m) overlap, only 0.2 gpm/ft2 (8.1 mm/min) is needed forthat portion.

If the storage is separated from the surrounding area by a floor-to-ceiling/roof partition that is capable ofpreventing delaying heat from a fire on one side from fusing sprinklers on the other side, the size of theoperating area is determined by the occupancy of the surrounding area. In this example, the design area

is 1500 ft2 (139 m2). A 0.3 gpm/ft2 (12.2 mm/min) density is needed within the separated area with 0.2

gpm/ft2 (8.1 mm/min) in the remainder of the remote area.

Where high temperature–rated sprinklers are installed at the ceiling, high temperature–rated sprinklersalso should extend beyond storage in accordance with Table A.12.3.

When the small higher hazard area is larger than the required minimum area dictated by the surroundingoccupancy, even when separated by partitions capable of stopping heat, the size of the operating area isdetermined by the higher hazard storage.

When the small higher hazard area is larger than the required minimum area dictated by the surroundingoccupancy, even when separated by draft curtains, barriers, or partitions capable of delaying heat, thesize of the operating area is determined by the higher hazard storage.

Table A.12.3 Extension of Installation of High-Temperature Sprinklers over Storage

Design Area for High Temperature–RatedSprinklers

Distance Beyond Perimeter of High Hazard

Occupancy for High Temperature–RatedSprinklers

ft2 m2 ft m

2000 185.8 30 9.14

3000 278.7 40 12.2

4000 371.6 45 13.72

5000 464.5 50 15.24

6000 557.4 55 16.76





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Committee Statement: The final paragraph of A.12.1.3 was intended to be attached to A.12.3.

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A.15.2





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The densities and area of application have been developed from fire test data. Most of these tests were

conducted with K-8 orifice sprinklers and 80 ft2 or 100 ft2 (7.4 m2 or 9.3 m2) sprinkler spacing. These and

other tests have indicated that, with densities of 0.4 gpm/ft2 (16.3 mm/min) and higher, better results are

obtained with K-8 orifice and 70 ft2 to 100 ft2 (7.4 m2 to 9.3 m2) sprinkler spacing than where using K-5.6

orifice sprinklers at 50 ft2 (4.6 m2) spacing. A discharge pressure of 100 psi (6.9 bar) was used as astarting point on one of the fire tests. It was successful, but has a 11⁄2 ft (0.5 m) clearance between the topof storage and ceiling sprinklers. A clearance to ceiling of 10 ft (3 m) could have produced a differentresult due to the tendency of the higher pressure to atomize the water and the greater distance that thefine water droplets had to travel to the burning fuel.

Table A.15.2 explains and provides an example of the method and procedure to follow in using thisstandard to determine proper protection for Group A plastics. The following are some examples for usingthe decision tree and density/area tables of Section 15.2 of this standard to determine proper protectionfor Group A plastics stored in solid pile, palletized, bin-box, or shelf storage arrays.

Table A.15.2 Metric Conversion Factors for Examples

To Convert from toMultiply

by

feet (ft) meters (m) 0.3048

square feet (ft 2 ) square meters (m 2 ) 0.0929

gallons/minute (gpm) liters/second (L/sec) 0.0631

gallons per minute per square foot

(gpm/ft 2 )

millimeters per minute (same as liters per minute persquare meter) (mm/min)

40.746

Example 1. Storage is expanded, cartoned, stable, 15 ft (4.6 m) high in a 20 ft (6.1 m) building.

Answer 1. Column E of Table 15.2.6(a)or Table 15.2.6(b) — Design density is 0.45 gpm/ft2 (18.3mm/min).

Example 2 . Storage is nonexpanded unexpanded , unstable, 15 ft (4.6 m) high in a 20 ft (6.1 m) building.

Answer 2. Column A of Table 15.2.6(a)or Table 15.2.6(b) — Design density is listed as 0.25 gpm/ft 2

(10.2 mm/min); however, it is also possible that the storage can be 12 ft (3.66 m) in this 20 ft (6.1 m)

building, which would require a design density of 0.3 gpm/ft 2 (12.2 mm/min). Unless the owner can

guarantee that the storage will always be 15 ft (4.6 m), the design density = 0.3 gpm/ft2 (12.2 mm/min).

Example 3 . Storage is a nonexpanded unexpanded , stable 15 ft (4.6 m) 13 ft (4.0 m) fixed-height solidunit load, one high, in an 18 ft (5.5 m) 15 ft (4.6 m) building.

Answer 3. Column A of Table 15.2.6(a)or Table 15.2.6(b) —- Design density is 0.25 gpm/ft 2 (10.2

mm/min). Note that this design density does not increase to 0.3 gpm/ft 2 (12.2 mm/min) as in theprevious example because of the use of a fixed-height unit load. The storage height will never be 12 ft(3.66 m). It will always be 15 ft (4.6 m). for almost 15 ft (4.6 m) storage in the building would be 0.3

gpm/ft 2 (12.2 mm/min). Design density for 12 ft (3.6 m) storage in a 15 ft (4.6 m) building would be 0.2

gpm/ft 2 (8.2 mm/min). Subsection 15.2.9 allows interpolation of the storage height between 12 ft (3.6

m) and 15 ft (4.6 m). So a final density of 0.233 gpm/ft 2 (9.5 mm/min) is appropriate for 13 ft (4.0 m)storage in a 15 ft (4.6 m) high building.

Example 4. Storage is expanded, exposed, unstable, 20 ft (6.1 m) high in a 27 ft (8.2 m) building.

Answer 4. Column C of Table 15.2.6(a)or Table 15.2.6(b) — Design density is 0.7 gpm/ft2 (28.5mm/min). Note that other lower storage heights should also be checked, but they reveal the same, or

lower, densities [0.7 gpm/ft 2 and 0.6 gpm/ft 2 (28.5 mm/min and 24.5 mm/min)], so the design density

remains at 0.7 gpm/ft 2 (28.5 mm/min).

Example 5. Storage is expanded, cartoned, unstable, 17 ft (5.2 m) high in 32 ft (9.75 m) building.

Answer 5. Column D of Table 15.2.6(a)or Table 15.2.6(b) — 15 ft (4.6 m) storage in a 32 ft (9.75 m)


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building would be 0.55 gpm/ft2 (22.4 mm/min); 20 ft (6.1 m) storage in a 32 ft (9.75 9.8 m) building would

be 0.7 gpm/ft2 (28.5 mm/min). Interpolation for 17 ft (5.2 m) storage is as follows:

Design density = 0.61 gpm/ft2 (24.9 mm/min)

Example 6 . Storage is expanded, exposed, stable, 22 ft (6.71 m) high in a 231 ⁄2 ft (7.16 m)building. unexpanded, stable, exposed, 131 ⁄2 ft (4.1 m) high in a 15 ft (4.6 m) building.

Answer 6. Column B E of Table 15.2.6(a)or Table 15.2.6(b) — Could interpolate between 0.6 gpm/ft 2

and 0.75 gpm/ft 2 (24.5 mm/min and 30.6 mm/min); however, this would be a moot point since the

density for 15 ft (4.6 m) storage in this 23 1 ⁄2 ft (7.16 m) building would be 0.8 gpm/ft 2 (32.6 mm/min).

Unless the owner can guarantee 22 ft (6.71 m) storage, the design density is 0.8 gpm/ft 2 (32.6mm/min). If the owner can, in a manner acceptable to the authority having jurisdiction, guarantee 22 ft

(6.71 m) storage, the interpolation would yield a design density of 0.66 gpm/ft 2 (26.9 mm/min). 12 ft

(3.66 m) storage in a 15 ft (4.6 m) building would be extra hazard, Group 2 [0.4 gpm/ft 2 over 2500 ft 2

(16.3 mm/min over 230 m 2 )]. For 15 ft (4.6 m) storage, the density would be 0.45 gpm/ft 2 (18.3mm/min). Interpolation for 13 1 ⁄2 ft (4.1 m) storage is as follows:

Design density = 0.426 gpm/ft 2 (17.4 mm/min)

Example 7 . Storage is nonexpanded, stable, exposed, 13 1 ⁄2 ft (4.1 m) high in a 15 ft (4.6 m) building.

Answer 7 . Column E of Table 15.2.6(a) — 12 ft (3.66 m) storage in a 15 ft (4.6 m) building would be

extra hazard, Group 2 [0.4 gpm/ft 2 over 2500 ft 2 (16.3 mm/min over 230 m 2 )].

Storage 15 ft (4.6 m) high in a 15 ft (4.6 m) building would be 0.45 gpm/ft 2 (18.3 mm/min). Interpolationfor 13 1 ⁄2 ft (4.1 m) storage is as follows:

Design density = 0.426 gpm/ft 2 (17.4 mm/min)




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CommitteeStatement:

This change cleans up a number of problems with the examples. First, the reference to the metricconversion table was incorrect and misleading as well as unnecessary. The examples can be done inboth traditional ft-pound units and metric units without the need of a conversion table, so it has beeneliminated. The exaples themselves have been fixed to match the values in Tables 15.2.6(a) and15.2.6(b). These tables were modified a few years ago and the examples did not catch up with themodifications. Example 6 was eliminated because there were already sufficient interpolationexamples and the issue it was highlighting is no longer relevent given the changes to the tables.

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A.15.2.2

Two direct comparisons between ordinary temperature– and high temperature–rated sprinklers arepossible, as follows:

With nonexpanded polyethylene 1 gal (3.8 L) bottles in corrugated cartons, a 3 ft (0.9 m) clearance,and the same density, approximately the same number of sprinklers operated (nine at hightemperature versus seven at ordinary temperature)

With exposed, expanded polystyrene meat trays, a 9.5 ft (1.9 m) clearance, and the same density,three times as many ordinary temperature–rated sprinklers operated as did high temperature–ratedsprinklers (11 at high temperature versus 33 at ordinary temperature)

The cartoned plastics requirements of this standard are based to a great extent on test work that used aspecific commodity — : 16 oz (0.473 L) polystyrene plastic jars individually separated by thin carton stock

within a large corrugated carton [31⁄2 ft2 (0.32 m2)]. [See Figure A.15.2.2(a) .]

Figure A.15.2.2(a) Corrugated Carton Containing Individually Separated Plastic Jars.

Other Group A plastic commodities can be arranged in cartons so that they are separated by multiplethicknesses of carton material. In such arrangements, less plastic becomes involved in the fire at any onetime. This could result in a less vigorous fire that can be controlled by Class IV commodity protection.

Other situations exist in which the plastics component is surrounded by several layers of less hazardousmaterial and is therefore temporarily protected or insulated from a fire involving adjacent plastic products.Such conditions also could produce a less vigorous fire and be successfully handled by Class IVprotection. [See Figure A.15.2.2(b).]

Figure A.15.2.2(b) Corrugated Carton Containing Plastic Pieces Individually Separated by CartonMaterial.

The decision to protect as a Class IV commodity, however, should be made only based on experiencedjudgment and only with an understanding of the consequences of underprotecting the storage segment.




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The first portion of A.15.2.2 compares protection with ordinary temperature- and high temperaturerated sprinklers, but Section 15.2.2 does not touch on this subject. Therefore, that text should bemoved to provide guidance to Section 15.2.8, which contains the requirements as to whichtemperature rated sprinklers are to be used.

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First Revision No. 206-NFPA 13-2013 [ New Section after A.16.2.1.3.2.1 ]

A.16.2.1.3.4.5

It is not the intent that an in-rack sprinkler be installed above the top-tier of storage when utilizing“in-rack sprinklers in every tier.”




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These FRs are consistent with the intent of PI 384. This FR clarifies that it is not the intent toinstall in-rack sprinkler above stored goods on the top tier of a rack.

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A.20.2

Exposed, expanded Group A plastic dunnage, instrument panels, and plastic bumper facia were theautomotive components with their related packaging that were utilized in the fire tests. This testcommodity used in the large-scale sprinklered fire test proved to be the worst challenge per thelarge-scale calorimeter tests of available components. See Technical Report of Fire Testing of AutomotiveParts in Portable Storage Racking, prepared by Underwriters Laboratories, Project 99NK29106, NC4004,January 5, 2001, and Commodity Hazard Comparison of Expanded Plastic in Portable Bins and Racking,Project 99NK29106, NC4004, September 8, 2000.




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CommitteeStatement:

This FR corrects a typographical error in 3.9.3.2, and for clarity. As per 5.6.4.4, it is only Group Aplastics that are subdivided into expanded or nonexpanded categories, but as written, the text of3.9.3.2, 20.2 and A.20.2 appears to be referring to all plastic classes.

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A.21.2


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The protection options offered in Section 21.2 are intended to be based on the results of full-scale firetests conducted at a recognized testing laboratory using the standardized testing methods established bythe testing laboratory and supplemented within this chapter.

Protection options for this chapter can be based on storage arrangements other than palletized, solidpiled, bin box, shelf storage, or back-to-back shelf storage, provided that the tested storage arrangement(such as rack storage) is deemed more hazardous than the storage arrangements outlined for thischapter.

Ceiling-level sprinkler system designs for this chapter should include a series of tests to evaluate theability of the sprinkler to control or suppress a fire under a range of test variables for the commodity to beprotected when maintained in a storage arrangement applicable to Section 21.2. The sprinkler standardsreferenced in Table A.6.1.1 provide detailed information regarding representative test commodities,measurement of steel temperatures, and the construction of igniters used to initiate the fire.

Test parameters to be held constant during the test series should include at least the following:

(1) Minimum operating pressure of the sprinklers

(2) Highest commodity hazard that will apply to the protection option

(3) Storage arrangement type

Test parameters that can vary during the test series should include at least the following:

(1) Ignition locations relative to the overhead sprinklers including the following:

(a) Under one sprinkler

(b) Between two sprinklers on the same branch line

(c) Between four sprinklers

(d) ADD analysis can be used to choose either option (b) or (c) A.21.2(1)(b) or A.21.2(1)(c)

(2) Maximum ceiling height (see Table A.21.2 for ceiling height variance); representative tests at eachceiling height limitation that has a discrete minimum operating pressure or number of sprinklersrequired to be included in the hydraulic calculation

(3) Storage heights that are based on the following clearances between the deflector of the ceiling-levelsprinkler and the top of storage:

(a) Minimum clearance, which is typically 3 ft (0.9 m)

(b) Nominal 10 ft (3.1 m) clearance

(c) Nominal 20 ft (6.1 m) clearance for maximum ceiling heights of 40 ft (12.2 m) or higher

(4) Minimum and maximum temperature ratings

(5) Minimum and maximum sprinkler spacing

(6) Maximum sprinkler distance below the ceiling when greater than 12 in. (305 mm).

See Figure A.21.2 for an example of a nominal 25 ft (7.6 m) high palletized storage fire test arrangement.See Table A.21.2 for a typical large-scale fire test series to investigate the performance of a sprinklercovered by this chapter having a standard coverage area and a discrete minimum operating pressure fora 30 ft (9.1 m) ceiling height.

In addition to determining the number of operated sprinklers, the maximum 1 minute average steeltemperature measured above the fire should not exceed 1000°F (538°C), and there should be nosustained combustion at the far end of the main test array and at the outer edges of the target arraysduring each test. In addition, no sprinklers should operate at the outer edges of the installed sprinklersystem.

The number of sprinklers to be used in the sprinkler system design will be based on the worst-case resultobtained from the full-scale fire test series increased by a minimum 50 percent. Regardless of the numberof sprinklers that operated during the worst-case full-scale fire test, the number in the sprinkler systemdemand will be no less than 12 sprinklers for standard coverage sprinklers or 6 six sprinklers for extendedcoverage sprinklers.

Figure A.21.2 Typical Example of 15 ft (4.6 m) Palletized Storage Full-Scale Fire TestArrangement.


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Table A.21.2 Typical Example of 25 ft (7.6 m) Palletized Storage Under 30 ft (9.1 m) Ceiling Full-ScaleFire Test Series on Simulated Wet-Type Sprinkler System (considers ADD results)

Parameter Test 1 Test 2 Test 3 Test 4

Storage type Palletized Palletized Palletized Palletized

Nominal storageheight, ft (m)

20 (6.1) 25 (7.6) 20 (6.1) 20 (6.1)

Nominal ceilingheight, ft (m)

30 (9.1)

Adjusted to achieveminimum sprinklerdeflector to commodityclearance

30 (9.1) 30 (9.1)

Sprinklertemperature rating

Minimumtemperaturerating

Maximum temperaturerating


Minimumtemperature rating

Nominal deflectorto ceiling distance,in (cm)

Maximumspecified bymanufacturer

Maximum specified bymanufacturer


Maximum specifiedby manufacturer

Sprinkler spacing,20 ft (6.1 m)

Maximumpermitted byNFPA 13

Maximum permitted byNFPA 13

Minimumpermitted byNFPA 13

Maximum permittedby NFPA 13

Nominal dischargepressure, psig(kPa)

Minimumoperating

Minimum operatingMinimumoperating

Minimum operating

Ignition location Under oneBetween two on samebranch line or betweenfour

Under oneBetween two onsame branch line orBetween four

Test duration,minutes

30 30 30 30



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A.21.3


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The protection options offered in Section 21.3 are intended to be based on the results of full-scale firetests conducted at a recognized testing laboratory using the standardized testing methods established bythe testing laboratory and supplemented within this chapter.

Ceiling-level sprinkler system designs for this chapter should include a series of tests to evaluate theability of the sprinkler to control or suppress a fire under a range of test variables for the commodity to beprotected when maintained in a storage arrangement applicable to Section 21.3. The sprinkler standardsreferenced in Table A.6.1.1 provide detailed information regarding representative test commodities,measurement of steel temperatures, and the construction of igniters used to initiate the fire.

Test parameters to be held constant during the test series should include at least the following:

(1) Minimum operating pressure of the ceiling-level sprinklers

(2) Highest commodity hazard that will apply to the protection option

(3) Storage arrangement type

(4) Minimum aisle width

Test parameters that can vary during the test series should include at least the following:

(1) Ignition locations relative to the overhead sprinklers including the following:

(a) Under one sprinkler

(b) Between two sprinklers on the same branch line

(c) Between four sprinklers

(d) ADD analysis can be used to choose either option (b) or (c) A.21.3(1)(b) or A.21.3(1)(c)

(2) Maximum ceiling height (see Table A.21.2 for ceiling height variance); representative tests at eachceiling height limitation that has a discrete minimum operating pressure or number of sprinklersrequired to be included in the hydraulic calculation

(3) Storage heights that are based on the following clearances between the deflector of the ceiling-levelsprinkler and the top of storage:

(a) Minimum clearance, which is typically 3 ft (0.9 m)

(b) Nominal 10 ft (3.1 m) clearance

(c) Nominal 20 ft (6.1 m) clearance for maximum ceiling heights of 40 ft (12.2 m) or higher

(4) Minimum and maximum temperature ratings

(5) Minimum and maximum sprinkler spacing

(6) Maximum sprinkler distance below the ceiling when greater than 12 in. (305 mm)

Historical testing has indicated that a double-row rack storage arrangement is considered representativeof single- and multiple-row rack storage. The ignition location relative to the sprinkler has beendemonstrated to be a key variable associated with full-scale fire tests. The critical ignition scenariosinclude locating (1) one of the sprinklers directly above the center of the main storage array, (2) two of thesprinklers on the same branch line such that the midpoint between the two sprinklers is directly above thecenter of the storage array, and (3) four sprinklers (two each on adjacent branch lines) such that thegeometric center point between the four sprinklers is located directly above the center of the main storagearray. The igniters for this testing should be placed at the base of the storage array and offset from thecenter of the main array in the transverse flue space as illustrated in Figure A.21.3. Previous testing hasdemonstrated that an offset ignition location represents a challenging test scenario.

A double-rack storage array should be a nominal 32 ft (9.8 m) long with single-row target arrays locatedon each side of the main array. The sprinkler branch lines should be installed in a direction that isperpendicular to the longitudinal flue spacing of the storage arrangement, and the branch lines over thetest array should be sized such that they represent the largest obstruction for upright-style sprinklers. SeeFigure A.21.3 for an example of a nominal 30 ft (9.1 m) high double-row rack storage fire testarrangement. See Table A.21.3(a) and Table A.21.3(b) for a typical full-scale fire test series to investigatethe performance of a sprinkler covered by this chapter having a standard coverage area and a discreteminimum operating pressure for a 40 ft (12.2 m) ceiling height.

In addition to determining the number of operated sprinklers, the maximum 1 minute average steel


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temperature measured above the fire should not exceed 1000°F (538°C), and there should be nosustained combustion at the far end of the main test array and at the outer edges of the target arraysduring each test. In addition, no sprinklers should operate at the outer edges of the installed sprinklersystem.

The number of sprinklers to be used in the sprinkler system design will be based on the worst-case resultobtained from the full-scale fire test series increased by a minimum 50 percent. Regardless of the numberof sprinklers that operated during the worst-case full-scale fire test, the number in the sprinkler systemdemand will be no less than 12 sprinklers for standard coverage sprinklers or 6 six sprinklers for extendedcoverage sprinklers.

Once the number of sprinklers for a demand area has been established, the minimum operating area,

based on the proposed sprinkler spacing, cannot be less than 768 ft2 (71 m2).

Figure A.21.3 Typical Example of 30 ft (9.1 m) Double-Row Rack Storage Fire Test Arrangement.

Table A.21.3(a) Typical Example of a 35 ft (10.7 m) Rack Storage Under a 40 ft (12.2 m) CeilingFull-Scale Fire Test Series on a Simulated Wet-Type Sprinkler System (considers ADD results)


Storage type Double-row rack Double-row rack Double-row rack Double-row rack


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30 (9.1) 35 (10.7) 30 (9.1) 20 (6.1)


40 (12.2)

Adjusted to achieveminimum sprinklerdeflector to commodityclearance

40 (12.2) 40 (12.2)






Nominal deflectorto ceiling distance,in. (cm)


Maximum specified bymanufacturer


Maximum specifiedby manufacturer


Maximumpermitted byNFPA 13

Maximum permitted byNFPA 13

Minimumpermitted byNFPA 13

Maximum permittedby NFPA 13

Nominal dischargepressure, psig(kPa)

Minimumoperating

Minimum operatingMinimumoperating

Minimum operating

Ignition location Under oneBetween two on samebranch line or betweenfour

Under oneBetween two onsame branch line orbetween four


30 30 30 30

Table A.21.3(b) Typical Example of 35 ft (10.7 m) Rack Storage Under 40 ft (12.2 m) Ceiling Full-ScaleFire Test Series on a Simulated Wet-Type Sprinkler System


Storage typeDouble-rowrack

Double-row rack Double-row rack Double-row rack


30 (9.1) 35 (10.7) 30 (9.1) 20 (6.1)


40 (12.2)Adjusted to achieveminimum sprinkler deflectorto commodity clearance

40 (12.2) 40 (12.2)






Nominal deflector toceiling distance, in(cm)

Within 12 (30.5)Maximum specified bymanufacturer




10 × 10 (3.0 ×3.0)

10 × 10 (3.0 × 3.0) 10 × 10 (3.0 × 3.0) 10 × 10 (3.0 × 3.0)

Nominal dischargepressure, psig (kPa)

Minimumoperating

Minimum operating Minimum operating Minimum operating

Ignition location Under one Between fourBetween two onsame branch line

Between two onsame branch line


30 30 30 30





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Committee Statement

Committee Statement: Dimensions were deleted from the rows where there are no values.

Response Message:


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A.23.3.2


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See Figure A.23.3.2(a) through Figure A.23.3.2(d).

Figure A.23.3.2(a) Summary Sheet.

Figure A.23.3.2(b) Hydraulic Calculation Example (Plan View and Elevation View).

Figure A.23.3.2(c) Hydraulic Calculations.


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Figure A.23.3.2(d) Hydraulic Graph.

Node 4 includes tee at top and bottom of riser nipple included with branch line due to consistent pipe sizefrom the pervious node.




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Committee Statement

CommitteeStatement:

In Step 4 Figure A.23.3.2(c), the tee at the top of the riser nipple and the tee at the bottom of risernipple are both included in the branch line calculation. However, Paragraph 23.4.4.7.1(4) states thatthe tee at the bottom of the riser nipple shall be included in the riser nipple. In this instance, thecalculation will remain the same but I the example should be consistent with the Standard. I haveseen people base a calculation on this example and do it incorrectly. A new line should be added to


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calculate the riser nipple. If desired, a note could also be added to indicate that in this instance, theriser nipple calculation can be combined with the branch line for various reasons which should thenbe stated, that is fine.

ResponseMessage:



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A.23.4.1

When additional sprinkler piping is added to an existing system, the existing piping does not have to beincreased in size to compensate for the additional sprinklers, provided the new work is calculated and thecalculations include that portion of the existing system that can be required to carry water to the new work.It is not necessary to restrict the water velocity when determining friction losses using the Hazen–Williamsformula.




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Committee Statement: The concept of maximum velocity was added to the body of the standard.

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A.23.4.4.7.2


The intent of this section is not to allow the omission of discharge from sprinklers in smallrooms compartments where the design area has been reduced below the values in Table 23.4.4.7.2 forsituations such as quick-response sprinklers. Where quick-response sprinklers are used, the dischargefrom sprinklers in small rooms compartments in the design area can be omitted as long as the designarea meets the size required by Table 23.4.4.7.2 .




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Committee Statement: To remove the confusion between small rooms and small compartments.

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A.24.1.3

For typical combined domestic/fire sprinkler demands, systems with 4 in. (100 mm) pipe or larger typicallydo not need to include the domestic demand in the calculations because it is such a small fraction of thetotal flow that it does not make a significant difference in the results. But for situations where 4 in. (100mm) pipe is used for the combined domestic/fire sprinkler systems and the domestic demand isconsiderable, then the domestic demand should be included in the calculations. Generally, pipe that is 6in. or larger can carry combined domestic/fire protection demand without any consideration for domesticdemand being necessary.




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Committee Statement: This annex text applies to the entire subsection on size of main piping.

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A.25.2.1.10

When a hydrostatic test is performed with plugs installed in lieu of pendent or sidewall sprinklers, asecond hydrostatic test should not be required after the installation of sprinklers.




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Committee Statement

CommitteeStatement:

Adding this annex material will clarify the committee's intent as it relates to hydrostatic tests withplugs in lieu of sprinklers. Many AHJ's require sprinklers to be in place during the hydrostatic test,which would result in having to replace the sprinklers when the pendent drop piping is removed .

ResponseMessage:


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A.25.6

While the information on this sign is useful during an inspection, such use should not be considered ahazard assessment based on the requirements of this standard. (See Figure A.25.6.)

Figure A.25.6 Sprinkler System General Information.



A.25.6.png Revised A.25.6



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CommitteeStatement:

The figure was updated to add the venting location required by 25.6.2 and to add a line item to putin the test results for dry and preaction systems that was also added to 25.6.2. Also a line wasadded so that it would be clear whether or not the system is a pipe schedule system or not.

ResponseMessage:



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First Revision No. 264-NFPA 13-2013 [ Section No. D.1 [Excluding any Sub-Sections] ]

This annex is provided as an aid to the user of NFPA 13 by identifying those portions of the 2012 edition ofNFPA 101 that pertain to sprinkler system design and installation. It is not intended that this annex providecomplete information regarding all aspects of fire protection addressed by NFPA 101. It is important tonote that this information was not copied from NFPA 101using but did not use NFPA's extract policy andis not intended to be a part of the requirements of NFPA 13.




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CommitteeStatement:

AS indicated by the NFPA 101 section number provided throughout Annex D, the material wascopied from NFPA 101, but is not extracted into the standard as mandatory text.

ResponseMessage:

Public Input No. 125-NFPA 13-2013 [Section No. D.1 [Excluding any Sub-Sections]]


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