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� 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…