� National Building Code 2020

� National Fire Code 2020

Introduction to Tacoma

Introduction to CCBFC/NFBC

NBC 2020 Update

NFC 2020 Update

Questions/Comments

Tacoma Engineers has its roots in

Guelph, Ontario providing structural

consulting services since 1980.

Currently have offices in Guelph,

Barrie and Waterloo.

The firm has grown steadily to a staff

of over fifty people, including

professional engineers, project

managers, technologists and

administration staff.

We have been involved in the

agricultural sector for 40 years, and

have proudly participated in the

evolution of farm structures.

To date, Tacoma Engineers has been

involved with over 2000 agricultural

projects.

CCBFC published the NFBC in

1995 as a National Model Code.

No substantive updates since

publication.

CFBA position on NFBC 1995Building Codes not keeping up with

the requirements of the farming

industry

Buildings increasing in size and

complexity but standards over 20

years old.

Concern that Provinces will lose

confidence with the existing 1995

national model code

CFBA lobbying for update

started in 2006 and continued for

over a decade

In 2014, CCBFC established

JTG, Technical Working Groups

and Standing Committees.

CFBA has been fully engaged

with each.

Mandate: Update farm building

requirements to enhance safety

and reflect industry requirements

Goal: New requirements to be

integrated into the NBC & NFC

in 2020.

Finish line is in site!

Draft requirements out for public

review; publication in December

2020.

Updated requirements in unique

NBC Part 2 Farm Buildings

Recognizes unique

characteristics of farm buildings

and farming industry including

low human occupancy.

Maintains definition of farm

buildings, rationale for unique

requirements and application

scope (protection of property)

Provides accommodations with

respect to life safety, building

size, building materials, means

of egress, access, design loads,

and ventilation.

2020

Farm building requirements to

be defined in a farm building

exclusive NBC Part 2. No longer

in a stand alone Farm Code

Document

Section 2.1 ApplicationFarm buildings defined as a separate

class of building (G) with 4 divisions

based on occupancy

G1: High Hazard Farm Buildings

G2: Standard Farm Building (not

otherwise defined)

G3: Greenhouses

G4: Farm Buildings with no human

occupancy

Barns with below floor manure

storages are classified as G1 but with

some special provisions (similar to

G2).

Section 2.2 Fire ProtectionSize & Construction

Typical farm buildings may be up to

three storeys, of combustible

construction and of unlimited area.

Fire detection required in farm buildings

with two or more stories

Multiple Major Occupancies

Permitted with some exceptions. Fire

separations will generally be required

between occupancies.

Subsidiary occupancies permitted with

reduced separation requirements, if any

required

Section 2.2 Fire ProtectionFire department access required

Spatial separation removed

Fire separations between service

rooms, incinerators, drying, repair

garages and hazardous material

storage

Spacing of attic fire stop to be based

on area

Exits: OVHD doors no longer

acceptable as exit door. In general, 2

exits required. Spacing of exits larger

but clear path

Emergency lighting to be required.

Exits to be clearly identified.

Manure tank ventilation required.

2.3 Structural Design

2.3.2.1 – Specified Live LoadsPrimarily maintained yet simplified from existing

NFBC

2.3.2.5 – Farm MachineryMaintained and new loads for large equipment

2.3.2.6 – Manure TanksStatement that external earth loads shall not be used

to reduce the effects of internal horizontal forces

shifted into the body of the Code (previously an

Appendix note).

Additional requirement that concrete for liquid manure

storage tanks conform to exposure class S1 (CSA

A23.1).

2.3.2 – Bins and Silos removed

2.3.3 Structural Design - Snow

No substantive changes from NFBC

requirements.

Updated in parallel with older codes to

50 year return period

Minimum roof snow load for

greenhouses, with heating and

drainage system installed, increased

to 1.0 kPa from 0.7 kPa and new

requirements for minimum heating

system with backup power.

2.3.4 Structural Design – Wind

Structural design for wind to be as per

Part 4 with no exceptions.

Design wind loads for farm buildings

increased from a 1 in 10 year return

period (NFBC) to a 1 in 50 year return

period (NBC).

2.3.5 Structural Design - Seismic

Exemption in NFBC stating that farm

buildings need not be designed for

seismic loads has been removed.

Structural design for earthquake to be

as per Part 4 with one exceptions.

In areas where IEFaSa(0.2)<0.35, farm

buildings need not be designed for

seismic loads. For this calculation

only, a Site Class D may be assumed

for determination of Fa.

For typical wood framed farm

structures, wind loads govern when

IEFaSa(0.2)<0.35.

2.3.6 Structural Design -

ProcedureNFBC Importance Factor for limit

states design of I=0.8 maintained (0.8

L, Is= 0.8 and Iw = 0.8).

Provisions to permit Allowable Stress

Design have been removed.

NFBC modified System Factors for

Sawn Lumber have been removed.

System factors to be as per O86

without modification.

NFBC provisions for load testing have

been removed. Any testing to be as

per material standards.

2.4 VentilationVentilation to be as per Part 6

Provisions for controlled atmosphere

storage and silo gases

Liquid manure storage tanks below

barns shall be ventilated to control

explosive risk. Minimum 2 air

changes per hour.

Fuel fired appliances to be separated

from the rest of the barn.

2.4 VentilationVentilation to be as per Part 6

Provisions for controlled atmosphere

storage and silo gases

Liquid manure storage tanks below

barns shall be ventilated to control

explosive risk. Minimum 2 air

changes per hour.

Fuel fired appliances to be separated

from the rest of the barn.

NFC 2020 Update

Restrictions on some adjacent

occupancies

Electrical specifications for wet &

corrosive environment

Electrical inspections and record

keeping

Maintenance of ventilation

equipment for manure storages

Public Review through March 13,

2020

CFBA review in progress

JTG review of comments

Proposed publication of the new

National Building Code including Farm

Building Requirements in 2020.

Bram & Tyler to discuss CFBA review

& comments…