RIR 22221A-04 - WoodSolutions 22221A-04.pdf · 12 th March 2015 RIR 22221A-01 Initial Issue 9th...

REGULATORY INFORMATION REPORT

The fire resistance performance of various

MRTFC roof and wall junctions in fire resistant wall construction if tested in

accordance with AS1530.4-2005

EWFA Report No:

RIR 22221A-04

Report Sponsor:

Forest and Wood Products Australia Limited Level 11, 10-16 Queen Street

Melbourne, VIC 3000

Report No. RIR 22221A-04 of 21

© Copyright Exova Warringtonfire Aus Pty Ltd 2016

CONTENTS

1 INTRODUCTION 4

2 TESTED PROTOTYPES 5

3 VARIATION TO TESTED PROTOTYPES 6

3.1 Proposed Wall and Roof Junctions 6

3.2 Roof Wall Junctions 7

3.3 Wall to Wall Junctions 8

3.4 Wall and Floor Junctions 12

4 REFERENCED TEST PROCEDURES 19

5 FORMAL ASSESSMENT SUMMARY 19

6 DIRECT FIELD OF APPLICATION 20

7 REQUIREMENTS 20

8 VALIDITY 20

9 AUTHORITY 21

9.1 Applicant Undertakings and Conditions of Use 21

9.2 General Conditions of Use 21

9.3 Authorisation on Behalf of Exova Warringtonfire Aus Pty Ltd 21

9.4 Date of Issue 21

9.5 Expiry Date 21



DOCUMENT REVISION STATUS

Date Issued Issue No Description

12th March 2015 RIR 22221A-01 Initial Issue

9th April 2015 RIR 22221A-02 Amended report sponsor details

21st December 2015 RIR 22221A-03 Typographical amendment

1st August 2016 RIR 22221A-04 Amended referenced test report sponsor details

CONTACT INFORMATION

Exova Warringtonfire Aus Pty Ltd - ABN 81 050 241 524

NATA Registered Laboratory

Unit 2, 409-411 Hammond Road Dandenong Victoria 3175 Australia

T: +61 (0)3 9767 1000 F: +61 (0)3 9767 1001

Victoria

Unit 2, 409-411 Hammond Road Dandenong Victoria 3175 Australia

T: +61 (0)3 9767 1000 F: +61 (0)3 9767 1001

New South Wales

Suite 2002a Level 20, 44 Market Street Sydney NSW 2000 Australia

T: +61 (0)2 8270 7600 F: +61 (0)2 9299 6076

Queensland

Northpoint, Unit 29, Level 6 231 North Quay Brisbane QLD 4000 Australia

T: +61 (0)7 3238 1700 F: +61 (0)7 3211 4833



1 INTRODUCTION

This report contains the minimum information sufficient for regulatory compliance in accordance with AS1530.4-2005 Clause 2.15.3 and refers to the Assessment Report EWFA 22221A-04.

The referenced assessment report (EWFA 22221A-04) presents an assessment of the fire resistance performance of Multi-Residential Timber Frame Construction (MRTFC) roof and wall junctions in fire resistant wall construction if tested in accordance with AS1530.4-2005.

There is a variety of situations when wall, ceiling, and roof construction meet and at these junctions the fire resistance of the fire-rated dividing wall must be maintained.

Solid timber blocks are used at junctions as a notional equivalent to fire grade linings, the more blocks the greater the fire resistance level achieved. This is an important means of making fire resisting joints between wall, ceiling, roof and floor elements in timber framed construction

Such joints are generally only required where there is a break in fire resisting lining and this generally excludes situations where two elements of the same FRL intersect. In this report the emphasis is on junctions with elements of different or lower FRL

In addition, details of non-fire rated steel beams supported be steel columns within a fire rated loadbearing wall are considered. The details assessed are intended to maintain continuity of the fire resistance and stability of the wall construction above and below the junction, while allowing for the floor on the fire side to collapse and for some rotation or distortion of the steel beam.

The performance of loaded non-fire rated floor systems is well understood. Although there are several different floor construction methods, they all tend to behave in a similar manner and degrade in four distinct steps

• Ceiling lining breach.

• Ceiling lining sheet falls off exposing steel beam to direct heating.

• Excessive deflection of steel beam.

• The attack of the residual wall construction at the exposed junction is commenced and the junctions are considered to receive direct exposure to the heating.

The tested systems are described in Section 2 and are to be subject to the design variations described in Section 3 and tested in accordance with the test method described in Section 4. The conclusions of the report are summarised in Section 5. The validity of this report is conditional on compliance with Sections 6, 7 and 8 of the report.

Figure 1 below shows a typical MRTFC wall construction.



.

Figure 1 – General Arrangement of Passive Fire Stopping

2 TESTED PROTOTYPES

The referenced assessment report is based on the following fire resistance tests BWA 2257601, BWA 2365300, and BWA 2365400 that comprised of various timber wall and floor junctions.

Reference is also made to FT149-04, which is a pilot test of Standard CD Gyprock ceiling fixed with a central screw and plasterboard adhesive.

Supplementary reference is made to IF00031, RF01038, 15312F, BGSI/5013; being tests of various floor truss ceilings.



3 VARIATION TO TESTED PROTOTYPES

3.1 PROPOSED WALL AND ROOF JUNCTIONS

It is proposed that the wall junctions shown in Figure 1 to Figure 24 between wall elements and other elements of dissimilar construction will not be detrimentally affect the performance of the walls as tested or, as otherwise assessed. The constructions considered include wall to roof, wall to wall, and wall to floor. Common forms of construction are considered including floor and roof trusses, and steel beams and columns. The drawings refer to materials generically, attached is a specification of the materials assessed in the referenced assessment report. Table 1 – Schedule of Components

Item Description

1

Name Timber truss

Material Typically solid timber with steel connecting plates

Size Width 35mm to 90mm.

2

Name Ceiling lining, minimum 1 layer standard core plasterboard.

Size 10mm thick

Installation Lining may be screw, nailed and or adhesive fixed in accordance with manufactures recommendation

3 Name Additional studs, blocks, header beams and plates (shown green)

Material Solid timber density of 470kg/m3

5 Name Steel angle

Material 35 x 35 x 0.70 galvanised steel angle

6 Name Wall and ceiling linings

Size Thickness as required to achieve required FRL of element

7

Name Fire grade sealant

Material Depth required is 16mm deep. Sealant shall have been tested in a plasterboard control joint and achieved a minimum performance of -/90/90.

8 Name Mineral wool at perimeter of walls

Material The mineral wool with a fusion temperature in excess of 1120º C.

9

Name Mineral wool around steel beams in figures 21-24

Material The mineral wool with a fusion temperature in excess of 1120º C and density greater than 80kg/m

3

10

Name Structural steel

Material Beams shall be 150UB14 or larger deeper sections.

Columns shall be 65 x 65 x 3mm SHS or larger

11

Name Resilient framing tie

Material Galvanised steel framing tie

Installation The framing ties shall be positioned at a minimum of 1200mm centres and fixed with at least two 12g x 30mm self drilling screws



3.2 ROOF WALL JUNCTIONS

Following are the proposed systems for protection the wall junctions that usually occur in roof construction.

Figure 2 – Roof rafter elements supported on timber blocks

Figure 3 – Truss elements supported off timber blocks



Figure 4 – Roof truss supported on timber blocks at box gutter

3.3 WALL TO WALL JUNCTIONS

Following are the proposed systems for protection the wall junctions that usually occur when fire rated walls intersect non-fire rated walls.

Figure 5 – Double stud fire rated wall meeting a non-fire rated wall using timber blocks



Figure 6 – Single stud fire rated wall meeting a non-fire rated wall using timber blocks

Figure 7 – Double stud fire rated wall meeting a non-fire rated wall using timber blocks and angles

Figure 8 – Single stud fire rated wall meeting a non-fire rated wall using timber blocks

and angles



Figure 9 – Double stud fire rated wall meeting an external cavity brick wall

Figure 10 – Double stud fire rated wall meeting an external cavity brick wall at a step in the plan of the building



Figure 11 – Double stud fire rated wall meeting a light external cladding



3.4 WALL AND FLOOR JUNCTIONS

Following are the proposed systems for protection the wall junctions that usually occur when fire rated walls intersect non-fire rated walls.

Figure 12 – Double stud fire rated wall meeting floor joist parallel to wall – double joist detail

Figure 13 – Double stud fire rated wall meeting floor joist parallel to wall stud through

junction



Figure 14 – Double stud fire rated wall meeting floor joist perpendicular to wall

Figure 15 – Single stud fire rated wall meeting floor joist



Figure 16 – Single stud fire rated wall meeting floor Joist parallel to wall stud through junction

Figure 17 – Double stud fire rated wall meeting floor joist, joists housed in pockets in framing.



Figure 18 – Arrangement of pockets for joists for double stud walls

Figure 19 – Double stud wall with floor truss supported by fire pockets



Figure 20 – Double stud wall with floor truss supported by fire pockets

Figure 21 – Steel beam and column junction - cut away view



Figure 22 – Steel beam and column junction - section elevation through wall

Figure 23 – Steel beam and column junction - section elevation through beam



Figure 24 – Steel beam and column junction - plan one side of wall only



4 REFERENCED TEST PROCEDURES

The referenced assessment report is prepared with reference to the requirements of AS 1530.4–2005.

5 FORMAL ASSESSMENT SUMMARY

Based on the discussion presented in the referenced assessment report, it is the opinion of this testing authority that if the tested prototype described in Section 2 had been modified within the scope of Section 3, it will achieve the fire resistance level (FRL) as stated below in if tested in accordance with the method referenced in Section 4 and subject to the requirements of Section 7.

Figure Number

Description of Construction at Junction FRL of Wall

Junction

Wall to Wall Junctions

2 Roof rafter elements supported on timber blocks 60/60/60

3 Truss elements supported off timber blocks 60/60/60

4 Roof truss supported on timber blocks at box gutter 60/60/60

Wall to Wall Junctions

5 Double stud fire rated wall meeting a non-fire rated wall using Blocks

60/60/60

6 Single stud fire rated wall meeting a non-fire rated wall using blocks

60/60/60

7 Double stud fire rated wall meeting a non-fire rated wall using blocks and angles

90/90/90

8 Single stud fire rated wall meeting a non-fire rated wall using blocks and angles

90/90/90

9 Double stud fire rated wall meeting an external cavity brick wall 60/60/60

10 Double stud fire rated wall meeting an external cavity brick wall at a step in the plan of the building

60/60/60

Wall to Floor Junctions

11 Double stud fire rated wall meeting floor Joist parallel to wall – double joist detail

60/60/60

12 Double stud fire rated wall meeting floor Joist parallel to wall stud through junction

60/60/60

13 Double stud fire rated wall meeting floor Joist perpendicular to wall 60/60/60

14 Single stud fire rated wall meeting floor Joist 60/60/60

15 Single stud fire rated wall meeting floor joist parallel to wall stud through junction

60/60/60

16 Double stud fire rated wall meeting floor Joist, joists house in pockets in framing.

60/60/60

17 Arrangement of pockets for joists for double stud walls 60/60/60

18 Double stud wall with floor truss supported by fire pockets 60/60/60

19 Double stud wall with floor truss supported by fire pockets 60/60/60

20 Steel beam and column junction-cut away view 60/60/60

21 Steel beam and column junction-section elevation through wall 60/60/60

22-25 Steel beam and column various views 60/60/60



6 DIRECT FIELD OF APPLICATION

The application of the results of the referenced assessment report is to load bearing wall resisting fire from either direction. The results of this assessment are applicable to structures that support independent structure above and require support from each timber frame for the duration of the FRL period.

7 REQUIREMENTS

The referenced assessment report details the methods of construction, test conditions and assessed results of the specific elements of construction described herein been tested in accordance with AS 1530.4–2005.

It is required the wall elements above and below the details considered in this report are otherwise tested or assessed for the required fire resistance level.

Any further variations with respect to size, constructional details, loads, stresses, edge or end conditions, other than those identified in the referenced assessment report, may invalidate the conclusions drawn in the referenced assessment report.

8 VALIDITY

The referenced assessment report does not provide an endorsement by Exova Warringtonfire Aus Pty Ltd of the actual products supplied.

The conclusions of the referenced assessment report may be used to directly assess the fire resistance performance under such conditions, but it should be recognised that a single test method will not provide a full assessment of the fire hazard under all fire conditions.

Because of the nature of fire resistance testing, and the consequent difficulty in quantifying the uncertainty of measurement, it is not possible to provide a stated degree of accuracy. The inherent variability in test procedures, materials and methods of construction, and installation may lead to variations in performance between elements of similar construction.

The referenced assessment report can therefore only relate only to the actual prototype test specimens, testing conditions and methodology described in the supporting data, and does not imply any performance abilities of constructions of subsequent manufacture. The referenced assessment report is based on information and experience available at the time of preparation. The published procedures for the conduct of tests and the assessment of test results are the subject of constant review and improvement and it is recommended that the referenced assessment report be reviewed on or, before, the stated expiry date.

The information contained in the referenced assessment report shall not be used for the assessment of variations other than those stated in the conclusions above. The assessment is valid provided no modifications are made to the systems detailed in the referenced assessment report.

All details of construction should be consistent with the requirements stated in the relevant test reports and all referenced documents.



9 AUTHORITY

9.1 APPLICANT UNDERTAKINGS AND CONDITIONS OF USE

By using this report as evidence of compliance or performance, the applicant(s) confirms that:

• to their knowledge the component or element of structure, which is the subject of this assessment, has not been subjected to a fire test to the Standard against which this assessment is being made, and

• they agree to withdraw this assessment from circulation should the component or element of structure be the subject of a fire test by a test authority in accordance with the Standard against which this assessment is being made and the results are not in agreement with this assessment, and

• they are not aware of any information that could adversely affect the conclusions of this assessment and if they subsequently become aware of any such information, agree to ask the assessing authority to withdraw the assessment.

9.2 GENERAL CONDITIONS OF USE

This report may only be reproduced in full without modifications by the report sponsor. Copies, extracts or abridgments of this report in any form shall not be published by other organisations or individuals without the permission of Exova Warringtonfire Aus Pty Ltd.

9.3 AUTHORISATION ON BEHALF OF EXOVA WARRINGTONFIRE AUS PTY LTD

Prepared by: Revised by: Reviewed by:

K. Nicholls S. Hu D. Nicholson

9.4 DATE OF ISSUE

1/08/2016

9.5 EXPIRY DATE

30/12/2020

RIR 22221A-04 - WoodSolutions 22221A-04.pdf · 12 th March 2015 RIR 22221A-01 Initial Issue 9th...

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