Canadian National building Code 2015

Scanned by CamScanner
National
Building
Code
·201s
Volume 1
CON-lSNBC-C-Vl-1

- ii ing Code
ol
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d Co ion on uilding and Fh·e Codes
R•·•••rc Council of Can dlion
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First Edition 1941
Second Edition 1953
Third Edition 1960
Fourth Edition 1965
Fifth Edition 1970
Sixth Edition 1975
Seventh Edition 1977
Eighth Edition 1980
Ninth Edition 1985
Tenth Edition 1990
Eleventh Edition 1995
Twelfth Edition 2005
Thirteenth Edition 201 O
Fourteenth Edition 2015
ISBN 0-660-03633-5
NR24-28/2015E
NRCC 56190
©National Research Council of Canada 2015
Ottawa
World Rights Reserved
Printed in Canada
First Printing
2 4 6 8 10 9 7 5 3 1
Aussi disponible en frangais :
Code national du batiment - Canada 2015
CNRC 56190F .
ISBN 0-660-03635-9

Table of Contents
Volume 1
Preface
Relationship of the NBC to Standards Development and Conformity Assessment
Canadian Commission on Building and Fire Codes and Standing Committees
Division A
Part 1
Part 2
Part 3
Division B
Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8
Appendix C
Appendix D
Division C
Part 1
Part 2
Index
Division B
Part 9
Index
Compliance, Objectives and Functional Statements
Compliance
Objectives
Functional Statements
Acceptable Solutions
General
Reserved
Fire Protection, Occupant Safety and Accessibility
Structural Design
Environmental Separation
Heating, Ventilating and Air-conditioning
Plumbing Services
Safety Measures at Construction and Demolition Sites
Climatic and Seismic Information
Fire-Performance Ratings
Administrative Provisions
General
Volume 2
Housing and Small Buildings
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Division A
Compliance, Objectives and
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Ion A
Part 1
Compli n
1.1. General
1.1.1.
Appllcatlon of this Code .................. 1-1
1.2. Compllance
1.2.1.
Compliance with this Code ............. 1-1
1.2.2. Materials, Appllances, Systems
and Equipment ................................. 1·1
1.3. Dlvl Ions A, B and C of
thl Code
1.3.1. General .............................................. 1·2
1.3.2. Appllcatlon of Division A ................. 1·2
1.3.3. Appllcatlon of Division B ................. 1·2
1.3.4. Appllcatlon of Division C ................. 1-3
1.4. Terms and Abbreviations
1.4.1. Definitions of Words and Phraaas .. 1-3
1.4.2. Symbols and Other
Abbreviations ................................. 1·13
1.5. Referenced Documents
and Organizations
1.5.1. Referenced Documents ................. 1-14
1.5.2. Organizations ................................. 1·14
Notes to Part 1 •••••••••••••••• 1·15
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Division A
Part 2
Objectives
2.1. Application
2.1.1. Application ........................................ 2-1
2.2. Objectives
2.2.1. Objectives ......................................... 2-2
Notes to Part 2 .................. 2·7
Code of Canada 2015 Volume 1
National Bui/ding

Division B
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Division B
Part 1
General
1.1. General
1.1.1.
1.1.2.
1.1.3.
1.1.4.
1.2.
Application ........................................ 1-1
Objectives and Functional
Statements ........................................ 1-1
Climatic and Seismic Data .............. 1-1
Fire Safety Plan .............•.................. 1-1
Terms and Abbreviations
1.2.1. Definitions of Words and Phrases .. 1-1
1.2.2. Symbols and Other Abbreviations .. 1-2
1.3. Referenced Documents
and Organizations
1.3.1. Referenced Documents ................... 1-2
1.3.2. Organizations ................................. 1-27
Notes to Part 1 ................ 1-31
. I B ··dlng Code of Canada 2015 Volume 1Nations u,,,

Division B
Part 2
Reserved
N• tion•I Building Code of Canada 2015 Volume 1
Division B 2-1
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Division B
Part 3
Fire Protection, Occupant Safety and
Accessibility
3.1. General
3.1.1.
3.1.2.
3.1.3.
3.1.4.
3.1.5.
3.1.6.
Scope and Definitions ..................... 3-1
Classification of Buildings or
Parts of Buildings by Major
Occupancy ........................................ 3-1
Multiple Occupancy
Requirements ................................... 3-2
Combustible Construction .............. 3-4
Noncombustible Construction ........ 3-7
Tents and Air-Supported
Structures ....................................... 3-1 6
3.1.7. Fire-Resistance Ratings ................ 3-17
3.1.8. Fire Separations and Closures ..... 3-18
3.1.9. Penetrations in Fire Separations
and Fire-Rated Assemblies ........... 3-25
3.1.10.
3.1.11.
3.1.12.
3.1.13.
3.1.14.
3.1.15.
3.1.16.
3.1.17.
3.2.
3.2.1.
3.2.2.
3.2.3.
3.2.4.
3.2.5.
3.2.6.
3.2.7.
3.2.8.
3.2.9.
3.3.
3.3.1.
3.3.2.
3.3.3.
3.3.4.
3.3.5.
Firewalls .......................................... 3-27
Fire Blocks in Concealed
Spaces ............................................. 3-29
Flame-Spread Rating and
Smoke Developed Classification .. 3-31
Interior Finish ................................. 3-31
Roof Assemblies ............................ 3-34
Roof Covering ................................. 3-35
Fabrics ............................................ 3-35
Occupant Load ............................... 3-36
Building Fire Safety
General ............................................ 3-37
Building Size and Construction
Relative to Occupancy ................... 3-39
Spatial Separation and
Exposure Protection ...................... 3-69
Fire Alarm and Detection
Systems ........................................... 3-82
Provisions for Firefighting ............. 3-91
Additional Requirements for
High Buildings ................................ 3-96
Lighting and Emergency Power
Systems ........................................... 3-99
Mezzanines and Openings
through Floor Assemblies ........... 3-103
Integrated Fire Protection and
Life Safety Systems ..................... 3-105
Safety within Floor Areas
All Floor Areas .............................. 3-105
Assembly Occupancy .................. 3-114
Care, Treatment or Detention
Occupancies ................................. 3-119
Residential Occupancy ................ 3-121
Industrial Occupancy ................... 3-124
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3.41.
3,4.1.
U.2.
3.4.S.
3.4.4.
3.4.5.
3.4.1.
3,4.7.
3.S.
S.S.1.
U.S.
7
3.U
3.7.2.
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Dealgn of Hazardou• Area• ........ 3-126
Exit•
Qenel'III .......................................... 3-128
Number and Location of Exit•
from Floor Area• .......................... 3-129
Width and Height of Exit• ............ 3-132
Fire s.peratton of E It• ............... 3-134
Exit Sign• ...................................... 3-135
TypN of E It Facllltl • ................. 3-138
Fire E pea ................................. 3-145
I n port•tlon
I .......................................... 3-148
ndard ...................................... 3-148
r11tton• ........................... 3-147
DkMn IOnaand Sign• ................. 3-147
c• F•cllltl••
Qanaral .......................................... 3-148
Sarvlca Room• ............................. 3-148
v.rtlcal Service Space• and
Service Facllltlea .......................... 3-151
Horlmntal Service Space• and
Service Facllltlea .......................... 3-152
Air Duct and Plenum Syatama .... 3-154
He91th Requirement•
Haight of Room• ......................._. 3-157
Plumbing Facllltlea ...................... 157
Medical Ga• Piping Syatema ·-·.. 1•
Acce..lblllty
Scopa ............................................ 3-111
AppUcatlon .................................... 3-161
DNlgn ••"....................................... 3-164
-,vice Ston1ge
.......a.-.1 ._......._ ............................ 3-173
11111 Fll9 Safety ...................... 3-173
Floor AIN8 ................................... 3-174
Division 8

Division B
Part 3
Fire Protection, Occupant Safety and
Accessibility
(See Note A-3.)
Section 3.1. General
3 .1.1.
3.1 .1.1.
3.1.1.2.
3 .1.1.3.
3 .1.1 .4 .
3.1.2.
3.1.2.1 .
Scope and Definitions
Scope
1) The scope of this Part shall be as described in Subsection 1.3.3. of Division A.
Defined Words
1) Words that appear in italics are defined in Article 1.4.1.2. of Division A.
Use of Term Storage Tank
1) For the purposes of this Part, the term "storage tank" shall mean a vessel
for.[Lammable liquids or combustible liquids having a capacity of more than 230 L and
designed to be installed in a fixed location.
Fire Protection Information
1) Information to be submitted regarding major components of fire protection
shall conform to the requirements of Subsection 2.2.3. of Division C.
Classification of Buildings or Parts of Buildings by Major
Occupancy
(See Note A-3.1.2.)
Classlffcatlon of Buildings
1) Except as permitted by Articles 3.1.2.3. to 3.1.2.5., every building or part thereof
shall be classified according to its major occupancy as belonging to one of the Groups or
Divisions described in Table 3.1.2.1. (See Note A-3.1.2.1.(1).)
2) A building intended for use by more than one major occupancy shall be classified
according to all major occupancies for which it is used or intended to be used.
lfll/l6J8IBuilding Gode-ofea,,adlltfflli VDlume 1

Division B
Part 4
Structural Design
4.1. Structural Loads and
Procedures
4.1.1.
4.1.2.
4.1.3.
4.1.4.
4.1.5.
4.1.6.
4.1.7.
General .............................................. 4-1
Specified Loads and Effects ........... 4-2
Limit States Design .......................... 4-3
Dead Loads ....................................... 4-7
Live Loads Due to Use and
Occupancy ........................................ 4-7
Loads Due to Snow and Rain ........ 4-13
Wind Load ....................................... 4-27
4.1.8. Earthquake Load and Effects ........ 4-43
4.2. Foundations
4.2.1. General ............................................ 4-72
4.2.2.
4.2.3.
4.2.4.
4.2.5.
4.2.6.
4.2.7.
4.2.8.
4.3.
4.3.1.
4.3.2.
4.3.3.
4.3.4.
4.3.5.
4.3.6.
4.4.
4.4.1.
4.4.2.
Subsurface Investigations,
Drawings and Reviews .................. 4-72
Materials Used in Foundations ..... 4-72
Design Requirements .................... 4-74
Excavations .................................... 4-75
Shallow Foundations ..................... 4-76
Deep Foundations .......................... 4-77
Special Foundations ...................... 4-78
Design Requirements for
Structural Materials
Wood ............................................... 4-78
Plain and Reinforced Masonry ...... 4-78
Plain, Reinforced and
Pre-stressed Concrete ................... 4-78
Steel ................................................. 4-79
Aluminum ........................•............... 4-79
Glass ............................................... 4-79
Design Requirements for
Special Structures
Air-Supported Structures .............. 4-79
Parking Structures ......................... 4-79
4.5. Objectives and
4.5.1. Objectives and Functional
Statements ..............•.......•............... 4-80
Notes to Part 4 ................ 4-91
National Building Code of Canada 2015 Volume 1

Division B
Part 5
Environrnental Separation
s.1.
5.1.1.
5.1.2.
5.1.3.
5.1.4.
5.1.5.
5.2.
5.2.1.
5.2.2.
5.3.
5.3.1.
5.4.
5.4.1.
S.S.
5.5.1.
5.6.
5.6.1.
5.6.2.
5.7.
5.7.1.
5.7.2.
5.7.3.
S.S.
5.8.1.
5.9.
5.9.1.
5.9.2.
5.9.3.
5.9.4.
5.10.
5.10.1.
General
Scope ................................................ 5-1
Application ........................................ 5-1
Definitions ......................................... 5-1
Resistance to Loads and
Deterioration ..................................... 5-2
Other Requirements ......................... 5-3
loads and Procedures
Environmental Loads and
Design Procedures ........................... 5-3
Structural Loads and Design
Procedures ........................................ 5-4
Heat Transfer
Thermal Resistance of
Assemblies ....................................... 5.5
Air leakage
Air Barrier Systems .......................... 5-5
Vapour Diffusion
Vapour Barriers ................................ 5-6
Precipitation
Protection from Precipitation .......... 5-7
Sealing, Drainage,
Accumulation and Disposal ............ 5-8
Surface and Ground
Water
Site Factors ....................................... 5-8
Protection against Hydrostatic
Pressure ............................................ 5-9
Protection against Ground Water ... 5-9
Sound Transmission
Protection from Airborne Noise .... 5-10
Standards
Applicable Standards .................... 5-12
Windows, Doors and Skylights ..... 5-15
Other Fenestration Assemblies .... 5-16
Exterior Insulation Finish
Systems ........................................... 5-17
Objectives and
Statements ...................................... 5-18
Notes to Part 5 ................ 5-21
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Division B
Part 6
6.1. General
6.1.1.
6.1.2.
6.1.3.
6.2.
6.2.1.
6.2.2.
6.2.3.
Application ........................................ 6-1
Definitions ......................................... 6-1
Plans and Specifications ................. 6-1
Planning
General .............................................. 6-1
Incinerators ..............:........................ 6-3
Solid Fuel Storage ............................ 6-3
6.3. Ventilation Systems
6.3.1. Ventilation ......................................... 6-3
6.3.2. Air Duct Systems .............................. 6-5
6.3.3. Chimneys and Venting
Equipment ......................................... 6-9
6.3.4. Ventilation for Laboratories .......... 6-10
6.4.
6.4.1.
6.4.2.
6.4.3.
Heating Systems
Heating Appliances, General ........ 6-11
Unit Heaters .................................... 6-11
Radiators and Convectors ............. 6-11
6.5. Thermal Insulation
Systems
6.5.1. Insulation ........................................ 6-11
6.6. Refrigeration and
Cooling Systems
6.6.1.
6.7.
6.7.1.
6.7.2.
Refrigerating Systems and
Equipment for Air-conditioning .... 6-12
Piping Systems
Piping for Heating and Cooling
Systems ........................................... 6-12
Storage Bins ................................... 6-13
6.8. Equipment Access
6.8.1. Openings ......................................... 6-13
6.9.
6.9.1.
6.9.2.
6.9.3.
6.9.4.
6.10.
6.10.1.
Fire Safety Systems
General ............................................ 6-13
Dampers and Ductwork ................. 6-14
Carbon Monoxide Alarms .............. 6-14
Ash Storage .................................... 6-15
Objectives and
Statements ...................................... 6-15
Notes to Part 6 ................ 6-19
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Division B
Part 8
Safety Measures at Construction and
Demolition Sites
8.1. General
8.1.1.
8.1.2.
8.2.
8.2.1.
8.2.2.
8.2.3.
8.2.4.
8.2.5.
Scope ................................................ 8-1
Application ........................................ 8-1
Protection of the Public
Fencing and Barricades .................. 8-1
Excavation ........................................ 8-2
Use of Streets or Public Property ... 8-2
Direction of Vehicular Traffic ........... 8-3
Waste Material .................................. 8-4
8.3. Objectives and
8.3.1. Objectives and Functional
Statements ........................................ 8-4
Notes to Part 8 ......•......•.... 8-7
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Divisions
Appendix C
Climatic and Seismic Information for
Building Design in Canada
Introduction
The reatdhw·it • f I' t · d I ·. . . s C1 1ma 'm ,ma a 1a a considerable effect on the performance of buiJdings; consequently,
building de I n mu~t r>fle t lhi diver ity. Thi Appendix briefly describes how climatic design vaJues are
om~ut _d and F 11dc r ommended design data for a number of cities, towns, and lesser popuJated
I a~ .n · 1:h ugh the u e f u h data, appropriate allowances can be made for climate variations in different
I alibc ot anada and the ationa.l Building Code can be applied nationally.
limati. d .i~ data pre ented in Table C-2 are based on weather observations collected by the
tm Sfh nc n .1r~nment Service, Environment Canada. The data were researched and anaJyzed for the
anad1an omnus 10n on Building and Fire Codes by Environment Canada.
it.· not r~cticaJ to list val~es for all municipalities in Canada, recommended climatic design values for
1 a_b n .t h t d can be obtamed by contacting the tmo pheric Environment Service, Environment Canada,
4 Du nn treet, Downsview, Ontario 3H -n.(416) 7394 65. It houJd be noted, however, that these
re n~~nded value may differ from the legal r quirements t by provinciaJ, territorial or municipal building
au ontie
The information on seismic hazard in p tral rmat 1, en in Table C-3 has been provided by the Geological
urYey of Canada of atural Re ourc anada. Int rmati: n f r municipalitie not listed can be obtamed at
" vw.earthquak scanada.nrcan.gc.ca orb , writing t th~ lo i al Survey of Canada at 7 Obsen•atory
Crescent, Ottawa, Ontario Kl OY3, or at P. . Bo bOOO, idn •, B.C. V L 482.
Ger;ieral
The choice of climatic elements tabulated in thi ppendix and the form in which they are expre d have
been ilicta ed largely by the requiremen for pecific values in several sections of this Code. These elements
indude the Ground Snow Loads, ind Pre ure , Design Temperatures, Heating Degree-Da) , One-Day and
1- -. finut Rainfalls, the Annual Total Precipitation values and Seismic Data.The following notes briefly lain
the significance of these particuJar elements in building design, and inilicate which weather ob rvations were
used and how they were anaJyzed to yield the required design values.
Table C-2 tis d sign weath r recommendations and elevations for over 600 location , which have been
cho n based on a variety of r asons. Many incorporated citie and town with ignifi ant popuJations are
includ d uni s locat d close to larger cities. For parsely popuJated area , man maller towns and villages are
list d. Other locations have b n added to th list when the demand for lirnati de i n re ommendations at
these sit s has b en significant. The named location r f r to the p ific latitud and Ion itude defined by
the Ga;i:ette r of Canada ( atural R sour anada), available from Publishin and D pository Services
Canada, Public Works and Gov mmcnt S rvi Canada, ttawa, ntario Kl O 5. The elevations are given in
metre and r f r to heights abov ca lev I.
Imo tall of the weather ob rvation used in pr paring Tabl -- w re, of n cessity, ob erved at inhabited
I cations. To timat design value for arbitrary I ation , th b er d or computed values for the weather
stations I ere mapped and interpolated appr priat ly. Wh re pos ible, adju bnents have been applied for the
influenc of ele ation and known topographical eff els. Such influences include the tendency ~f cold air to
c LI ct in depres ions, for precipitation to increase with elevation, and f~r gener~y str~ng~~ wmds.near large
bodie of water. Elevations have been added to Table C-2 because of tl1eir potential to s1gruficantly influence
climatic de ign vaJu ·
· · terpolation from the value in Table C-2 to other locations may not be valid due to loc_al and o~er
f
Ulfcet mEnvironm nt Canada will provide climatic design element recommendations for locations not listede ec ,
Thi~ information is included for e:,.planatory purposes only and does not form part of the requirements.
Division B C-1
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Division B
Appendix D
Section D-1 General
The content of this Appendix was prepared on the recommendations of the Standing Committee on Fire
Protection, which was established by the Canadian Commission on Building and Fire Codes (CCBFC) for
this purpose.
D-1.1. Introduction
D-1.1.1. Scope
1) This fire-performance infom1ation is presented in a form dosely linked to the performance
requirements and the minimum materials specifications of this Code.
2) The ratings have been assigned only after careful consideration of all available literature on
assemblies of common building materials, where they are adequately identified by description. The assigned
values based on this information will, in most instances, be conservative when compared to the ratings
determined on the basis of actual tests on individual assemblies.
3) The fire-performance information set out in this Appendix applies to materials and assemblies of
materials that comply in all essential details with the minimum structural design standards described in Part 4.
Additional requirements, where appropriate, are described in other Sections of this Appendix.
4) Section D-2 assigns fire-resistance ratings for walls, floors, roofs, columns and beams related to
CAN/ULC-SlOl, "Fire Endurance Tests of Building Construction and Materials," and describes methods
for determining these ratings.
5) Section D-3 assigns flame-spread ratings and smoke developed classifications for surface materials
related to CA /ULC-S102, "Test for Surface Burning 01aracteristics of Building Materials and Assemblies," and
CA /ULC-S102.2, "Test for Surface Burning Characteristics of Flooring, Floor Coverings, and Miscellaneous
Materials and Assemblies."
6) Section D-4 describes noncombustibility in building materials when tested in accordance with
CAN/ULC-Sll4, "Test for Determination of on-Combustibility in Building Materials."
7) Section D-5 contains requirements for the installation of fire doors and fire dampers in fire-rated
stud wall assemblies.
8) Section D-6 contains background information regarding fire test reports, obsolete materials and
assemblies, assessment of ardiaic assemblies and the development of the component additive method.
D-1.1.2. Referenced Documents
1) Where documents are referenced in this Appendix, they shall be the editions designated in
Table 0 -1.1.2.
This information is included for explanatory purposes only and does not form part of the requirements. The bold
face reference numbers that introduce each item do not relate to specific requirements in this Division.
National Building Code of Canada 2015 Volume 1 Division B D-1
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Division C

Division C
Part 1
General
1.1. Application
1.1.1. Application ........................................ 1-1
1.2. Terms and Abbreviations
1.2.1. Definitions of Words and Phrases .. 1-1
1.2.2. Symbols and Other Abbreviations .. 1-1
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Division C
Part 2
Administrative Provi ions
2.1.
2 . 2.
.1.
2..
2.
6.
2 .7.
2.2.8.
2.3.
2••1.
A.ppllc lion
licali n ........................................ 2·1
Admlnl tr tlon
Admlni l-ratlon .................................. 2·1
Information A quired for
Propo cd Work ................................. 2-·1
fir Protection Components ········-· 2·2
Stn.,ctural and Foundation
Drawings and Calculatlons ··-··- 2-2
Drowlngs and Specifics ons ror
Envlronmenlal S p rntort nd
Other Ass mbll • Expc, o
the Ext rlor ............. • •.
H llng. V ntll ting and
Air-conditioning D win
Specll cations .......
R vi wof Work ......
Drawing , Sp cltlc t
and C lcutotlons for En
Per1ormanco Comp! enc -I
Alternative Solutions
Documentation of Altem ,
Solutions .......................·-·······--··-· 2·5
Not s to Part 2 .................. 2-7
""1tioMI 11u,ld1ng Codft ol ~nad• 201$ /0/ume 1
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Index
A
.2.l .•
.3 .4.4.
upan y, .3.-.b.
ntained p n
.4.4.
, 9..7.
N11tlori11I Building Code of Can11d11 2015 Volume 1
provi ions, 9.10.20.
r of area, 3.2.5.3.
storeys b ,1 w ground, 3.2.2.15.
loreys above grade, 3.2.5.1.
street frontages, 3.2.2.10.
Accessibility (see Barrier-free)
Access openings
construction barricades, 8.2.1.3.
HVAC systems, 6..1.1.
Access panels, 3.2.5.1., 9.10.20.1.
Access routes
de ign, 3.2.5.6.
I cation, 3.2.5.5., 9.10.20.3.
n d for, 3.2.5.4.
If- rvic storage buildings, 3.9.23.
a tr ts, 3.2.2.10.
d r zing, 1.4.1.2.(A], 4.2.4.4.
dh ive
ramie wall tiles, 9.29.103.
duct • 3.6.5.4., 9.33.6.4.
dministration of the Code, 2.2.[q
dmixture
concrete, 9.3.1. .
mortar and grout, 9.20.3.-
Aggregate
for built-up-roofing, 9.26.11.1. .2 .11.-1.
for concrete, 9.3.1.1., 9."'.1.-l., .3.1.7.
for mortar, 5.9.1.1., . O."'.1., ·- ."'-·, 9.29.10.2.
for stucco, 9.2 ·--·, .2 .5.1.
Air
I nkil re. i tan e, 5.-1.1.1., 5.4.1.2., 9.13.4., 9.1 .6.2.,
.25.5.1.
makeup, . .2.., 9.32.3..
p rm an , 5.4.1.2., 9.25.5.1.
t mp ring, 9.32.3.4., 9.32.3..
tran fer, 5.1.1.1., 5.2.1.3.
Air barrier sy terns
airtightness, 5.4.1.1., 9.36.2.9., 9.36.2.10.
as emblies in contact with the ground, 9.13.4.,
9.25.3.6.
continuity, 5.4.1.2., 9.25.3.3., 9.36.2.9.
crawl pace floors, 9.1 .6.2.
All other references occur in Division B.
Index

Conversion Factors
To Convert
To Multiply by
'C
'F 1.8 and add 32
kg
lb. 2.205
kPa
lbffln.i(psl) 0.1450
kPa
lbf/f1.2 20.88
kW
Btu/h 3412
L
gal. (imp.) 0.2200
Us
gal/min (gpm) 13.20
ft.-candle 0.09290
m
ft. 3.281
mi
ft.2 10.76
mJ
ft.3 35.31
mm
in. 0.03937
mS/h
lt.3/min (cfm) 0.5886
mis
fl/min 196.8
MJ
Btu 947.8
N
lbf 0.2248
ng/(Pa-s-m2) Btu/h 3.412

National
Building
Code
2015
Volume 2
CON-lSNBC-C-Vl-2
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National Building Code
of Canada
2015
Volume 2
Issued by the
Canadian Commission on Building and Fire Codes
National Research Council of Canada

First Edition 1941
Second Edition 1953
Third Edition 1960
Fourth Edition 1965
Fifth Edition 1970
Sixth Edition 1975
Seventh Edition 1977
Eighth Edition 1980
Ninth Edition 1985
Tenth Edition 1990
Eleventh Edition 1995
Twelfth Edition 2005
Thirteenth Edition 2010
Fourteenth Edition 2015
ISBN 0-660-03633-5
NR24-28/2015E
NRCC 56190
© National Research Council of Canada 2015
Ottawa
World Rights Reserved
Printed in Canada
First Printing
2 4 6 8 10 9 7 5 3 1
·Aussi disponible en fran9ais :
Code national du batiment - Canada 2015
CNRC 56190F
ISBN 0-660-03635-9

Table of Contents
Volume 1
Preface
Relationship of the NBC to Standards Development and Conformity Assessment
Canadian Commission on Building and Fire Codes and Standing Committees
Division A
Part 1
Part 2
Part 3
Division B
Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8
Appendix C
Appendix D
Division C
Part 1
Part 2
Index
Division B
Part 9
Index
Compliance, Objectives and Functional Statements
Compliance
Objectives
General
Reserved
Fire Protection, Occupant Safety and Accessibility
Structural Design
Environmental Separation
Plumbing Services
Safety Measures at Construction and Demolition Sites
Climatic and Seismic Information
General
Volume 2
NaUonal Building Code of Canada 2015 Volume 2
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Division S
Part 9
9.1.
9.1.1.
9.1.2.
9.2.
9.2.1.
9.3.
9.3.1.
9.3.2.
9.3.3.
9.4.
9.4.1.
9.4.2.
9.4.3.
9.4.4.
9.5.
9.5.1.
9.5.2.
9.5.3.
9.5.4.
9.5.5.
9.6.
9.6.1.
9.7.
9.7.1.
9.7.2.
9.7.3.
9.7.4.
9.7.5.
9.7.6.
9.8.
9.8.1.
9.8.2.
9.8.3.
9.8.4.
9.8.5.
9.8.6.
General
Application ........................................ 9-1
Limits on Floor Area ........................ 9-1
Definitions
General .............................................. 9-1
Materials, Systems and
Equipment
Concrete ............................................ 9-1
Lumber and Wood Products ........... 9-3
Metal .................................................. 9-6
Structural Requirements
Structural Design Requirements
and Application Limitations ............ 9-6
Specified Loads ................................ 9-7
Deflections ........................................ 9-8
Foundation Conditions .................... 9-8
Design of Areas and
Spaces
General ...•........................................ 9-10
Barrier-Free Design ........................ 9-10
Celling Heights ............................... 9-10
Hallways .............•............................ 9-11
Doorway Sizes ................................ 9-11
Glass
General ............................................ 9-12
Windows, Doors and
Skylights
General ............................................ 9-16
Required Windows, Doors and
Skylights ......................................... 9-16
Performance of Windows,
Doors and Skylights ...................... 9-17
Manufactured Windows, Doors
and Skylights .................................. 9-18
Site-built Windows, Doors and
Skylights ......................................... 9-19
Installation ...................................... 9-20
Stairs, Ramps, Handrails
and Guards
Application ......•..........................•.... 9-20
Stair Dimensions ............................ 9-21
Stair Configurations ....................... 9-21
Step Dimensions ............................ 9-22
Ramps ............................................. 9-24
Landings ......................................... 9-25
NaUonal Building Code of Canada 2015 Volume 2

9.8.7.
9.8.8.
9.8.9.
9.8.10.
9.9.
9.9.1.
9.9.2.
9.9.3.
9.9.4.
9.9.5.
9.9.6.
9.9.7.
9.9.8.
9.9.9.
9.9.10.
9.9.11.
9.9.12.
9.10.
9.10.t.
9.10.2.
9.10.3.
9.10.4.
9.10.5..
9.10.6.
9.10.7.
9.10.8.
9.10.9.
9.10.10.
9.10.11.
9.10.12.
9.10.13.
9.10.14.
9.10.15.
9.10.16.
9.10.17.
9.10.18.
9.10.19.
9.10.20.
9.10.21.
9.10.22.
9.11.
9.11.1.
Handrails ......................................... 9·26
Guards ............................................. 9-28
Construction ................................... 9-31
Cantllevered Precast Concrete
Steps ............................................... 9-32
Means of Egress
General ............................................ 9-32
Types and Purpose of Exits .......... 9-33
Dimension of Moons of Egr ... 9.33
Fire Protection of E II .................. 9.34
Obstruction and Hazard In
Means of Egros ............................. 9-36
Doors In a Mean of Egress .......... 9-37
Access to E Its ............................... 9-39
E It from Floor Areas ................... 9-40
Egre s from Dwelling Units ........... 9-41
Egress from Bedrooms .................. 9-42
Signs ............................................... 9-43
Lighting ........................................... 9-44
Fire Protection
Definitions and Application ........... 9-45
Occupancy Classification ............. 9-46
Ratings ............................................ 9-46
Building Size Determination ......... 9-47
Permitted Openings in Wall and
Ceiling Membranes ........................ 9-48
Construction Types ........................ 9-48
Steel Members ................................ 9-48
Fire Resistance and
Combustibility in Relation
to Occupancy, Height and
Supported Elements ...................... 9-48
Fire Separations and
Smoke-tight Barriers between
Rooms and Spaces within
Buildings ......................................... 9-50
Service Rooms ............................... 9-55
Firewalls .......................................... 9-56
Prevention of Fire Spread at
Exterior Walls and between
Storeys ............................................ 9-57
Doors, Dampers and Other
Closures in Fire Separations ......... 9-58
Spatial Separation Between
Buildings ......................................... 9-61
Spatial Separation Between
Houses ............................................ 9-66
Fire Blocks ...................................... 9-70
Flame-Spread Limits ...................... 9-72
Alarm and Detection Systems ....... 9-74
Smoke Alarms ................................ 9-75
Firefighting ..................................... 9-n
Fire Protection for Construction
Camps ............................................. 9-78
Fire Protection for Gas, Propane
and Electric Cooktops and
Ovens .............................................. 9-79
Sound Transmission
Protection from Airborne Noise .... 9-79
Division B
National Bui/ding Code of Canada 2015 Volume 2

Division B
9.12.
9.12.1.
9.12.2.
9.12.3.
9.12.4.
9.13.
9.13.1.
9.13.2.
9.13.3.
9.13.4.
9.14.
9.14.1.
9.14.2.
9.14.3.
9.14.4.
9.14.5.
9.14.6.
9.15.
9.15.1.
9.15.2.
9.15.3.
9.15.4.
9.15.5.
9.15.6.
9.16.
9.16.1.
9.16.2.
9.16.3.
9.16.4.
9.16.5.
9.17.
9.17.1.
9.17.2.
9.17.3.
9.17.4.
9.17.5.
9.17.6.
9.18.
9.18.1.
9.18.2.
9.18.3.
9.18.4.
9.18.5.
9.18.6.
9.18.7.
9.19.
9.19.1.
9.19.2.
Excavation
General ............................................ 9-81
Depth ............................................... 9-82
Backfill ............................................ 9-83
Trenches beneath Footings ........... 9-83
Dampproofing,
Waterproofing and Soil
Gas Control
General ............................................ 9-84
Dampproofing ................................. 9-84
Waterproofing ................................. 9-86
Soil Gas Control ............................. 9-87
Drainage
Scope .............................................. 9-88
Foundation Drainage ..................... 9-89
Drainage Tile and Pipe ................... 9-89
Granular Drainage Layer ............... 9-90
Drainage Disposal .......................... 9-90
Surface Drainage ............................ 9-90
Footings and
Foundations
Application ...................................... 9-91
General ............................................ 9-92
Footings .......................................... 9-92
Foundation Walls ........................... 9-94
Support of Joists and Beams
on Masonry Foundation Walls ...... 9-99
Parging and Finishing of
Masonry Foundation Walls ............ 9-99
Floors-on-Ground
Scope .............................................. 9-99
Material beneath Floors ............... 9-100
Drainage ........................................ 9-100
Concrete ........................................ 9-101
Wood ............................................. 9-101
Columns
Scope ............................................ 9-101
General .......................................... 9-102
Steel Columns .............................. 9-102
Wood Columns ............................. 9-102
Unit Masonry Columns ................ 9-103
Solid Concrete Columns ............. 9-103
Crawl Spaces
General .......................................... 9-103
Access ........................................... 9-104
Ventilation ..................................... 9-104
Clearance ...................................... 9-104
Drainage ........................................ 9-104
Ground Cover ............................... 9-105
Fire Protection .............................. 9-105
Roof Spaces
Venting .......................................... 9-105
Access ........................................... 9-106
Nat/anal Bui/ding Code of Canada 2015 Volume 2
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9.20.
9.20.1.
9.20.2.
9.20.3.
9.20.4.
9.20.5.
9.20.6.
9.20.7.
9.20.8.
9.20.9.
9.20.10.
9.20.11.
9.20.12.
9.20.13.
9.20.14.
9.20.15.
9.20.16.
9.20.17.
9.21,
9.21.1.
9.21.2.
9.21.3.
9.21.4.
9.21.5.
9.22.
9.22.1.
9.22.2.
9.22.3.
9.22.4.
9.22.5.
9.22.6.
9.22.7.
9.22.8.
9.22.9.
9.22.10.
9.23.
Masonry and Insulating
Concrete Form Walls
Not In Contact with the
Ground
Application .................................... 9-107
Masonry Units .............................. 9-107
Mortar ............................................ 9-108
Mortar Joints ................................ 9-109
Masonry Support ......................... 9-110
Thickness and Height .................. 9-110
Chases and Recesses ................. 9-111
Support of Loads ......................... 9-112
Bonding and Tying ....................... 9-113
Lateral Support ............................ 9-114
Anchorage of Roofs, Floors and
Intersecting Walls ......................... 9-115
Corbelling ..................................... 9-116
Control of Rainwater
Penetration ................................... 9-116
Protection during Work ..•............. 9-118
Reinforcement for Earthquake
Resistance .................................... 9-119
Corrosion Resistance .................. 9-119
Above-Ground Flat Insulating
Concrete Form Walls .................... 9-119
Masonry and Concrete
Chimneys and Flues
General .......................................... 9-121
Chimney Flues .............................. 9-121
Chimney Lining ............................ 9-123
Masonry and Concrete Chimney
Construction ................................. 9-124
Clearance from Combustible
Construction ................................. 9-125
Fireplaces
General .......................................... 9-126
Fireplace Liners ............................ 9-126
Fireplace Walls ............................. 9-126
Fire Chamber .....................:.......... 9-127
Hearth ............................................ 9-127
Damper .......................................... 9-127
Smoke Chamber ........................... 9-127
Factory-Built Fireplaces .............. 9-127
Clearance of Combustible
Material .......................................... 9-127
Fireplace Inserts and
Hearth-Mounted Stoves ............... 9-128
Wood-Frame
Construction
Application .................................... 9-128
General .......................................... 9-129
Fasteners ...................................... 9-129
Maximum Spans ........................... 9-133
Notching and Drilling ................... 9-135
Anchorage .................................... 9-135
Sill Plates ...................................... 9-137
Beams to Support Floors ............ 9-137
Floor Joists ................................... 9-138
9.23.1.
9.23.2.
9.23.3.
9.23.4.
9.23.5.
9.23.6.
9.23.7.
9.23.8.
9.23.9.
9.23.10. Wall Studs ..................................... 9-140
1
Division B

Division B
9.23.11.
9.23.12.
9.23.13.
9.23.14.
9.23.15.
9.23.16.
9.23.17.
9.24.
9.24.1.
9.24.2.
9.24.3.
9.25.
9.25.1.
9.25.2.
9.25.3.
9.25.4.
9.25.5.
9.26.
9.26.1.
9.26.2.
9.26.3.
9.26.4.
9.26.5.
9.26.6.
9.26.7.
9.26.8.
9.26.9.
9.26.10.
9.26.11.
9.26.12.
9.26.13.
9.26.14.
9.26.15.
9.26.16.
9.26.17.
9.26.18.
9.27.
9.27.1.
9.27.2.
9.27.3.
9.27.4.
9.27.5.
9.27.6.
9.27.7.
9.27.8.
Wall Plates .................................... 9-142
Framing over Openings ............... 9-143
Bracing to Resist Lateral Loads
Due to Wind and Earthquake ...... 9-144
Roof and Celling Framing ............ 9-149
Subfloorlng ................................... 9-152
Roof Sheathing ............................. 9-153
Wall Sheathing ............................. 9-155
Sheet Steel Stud Wall
Framing
General .......................................... 9-156
Size of Framing ............................. 9-157
Installation .................................... 9-1 58
Heat Transfer,
Air Leakage and
Condensation Control
General .......................................... 9-159
Thermal Insulation ....................... 9-160
Air Barrier Systems ...................... 9-161
Vapour Barriers ............................ 9-163
Properties and Position of
Materials in the Building
Envelope ....................................... 9-164
Roofing
General .......................................... 9-165
Roofing Materials ......................... 9-165
Slope of Roofed Surfaces ........... 9-167
Flashing at Intersections ............. 9-168
Eave Protection for Shingles
and Shakes ................................... 9-170
Underlay beneath Shingles ......... 9-170
Asphalt Shingles on Slopes of
1 in 3 or Greater ............................ 9-171
Asphalt Shingles on Slopes of
less than 1 in 3 ............................. 9-172
Wood Roof Shingles .................... 9-172
Cedar Roof Shakes ...................... 9-173
Built-Up Roofs .............................. 9-174
Selvage Roofing ........................... 9-175
Sheet Metal Roofing ..................... 9-175
Glass Reinforced Polyester
Roofing .......................................... 9-176
Hot Applied Rubberized Asphalt
Roofing .......................................... 9-176
Polyvinyl Chloride Sheet
Roofing .......................................... 9-176
Concrete Roof Tiles ..................... 9-176
Roof Drains and Downspouts ..... 9-176
Cladding
Application .................................... 9-176
Required Protection from
Precipitation ................................. 9-1n
Second Plane of Protection ......... 9-179
Sealants ........................................ 9-181
Attachment of Cladding ............... 9-182
Lumber Siding .............................. 9-183
Wood Shingles and Shakes ........ 9-184
Plywood ........................................ 9-185
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9.27.9.
9.27.10.
9.27.11.
9.27.12.
9.27.13.
9,28.
9.28.t
9.28.2.
9.28.3.
9.28.4.
9.28.5.
9.28.6.
9.29.
9.29.t
9.29.2.
9.29.3.
9.29.4.
9.2.9.5.
9.29.6.
9.29..
9.2.9.8.
9.29.9.
9.29. 0.
9.30.
9.30.1.
9.30.2.
9.30.3.
9.30.4.
9.30.5.
9.30.6.
9.31.
9.31.1.
9.31.2.
9.31.3.
9.31.4.
9.31.5.
9.31.6.
9.32.
9.32.1.
9.32.2.
9.32.3.
9.33.
9.33.1.
9.33.2.
9.33.3.
9.33.4.
Hardboard ..................................... 9-186
OSB and Waferboard ................... 9-186
Metal .............................................. 9-187
Vinyl Siding ................................... 9·187
Exterior Insulation Finish
Systems ......................................... 9-188
Stucco
General .......................................... 9·188
Stucco Material ........................... 9·189
Fasteners ...................................... ·189
Stucco L th ..............,.................... 190
Stucco Ml ................................ 9-191
Stucco Appll ti n ....................... 9-191
Int rior W. II nd O lling
Fini h s
Gen ral .......................................... 9-192
terproof Wall Finish ................ 9-192
d Furring ................................ 9-192
ering ...................................... 9-193
G psum Board Finish (Taped
J ints) .._....................................... 9·193
P ood F'inish ............................. 9-195
rdboard Finish .......................... 9-196
Insulating Fibreboard Finish ....... 9·196
Particleboard OSB or
aferboard Finish ........................ 9-197
all Tile Finish ............................. 9·197
Flooring
General .......................................... 9-198
Panel-Type Underlay .................... 9-198
ood Strip Flooring ..................... 9-199
Parquet Flooring ........................... 9·200
Resilient Flooring ......................... 9-200
Ceramic Tile .................................. 9-201
Plumbing Facilities
Seope ""N'""'"'"'• •"• "••••"" ""'""'•••" 9•201
General .......................................... 9·201
Water Supply and Distribution .... 9-201
Required Facilities ....................... 9-201
Sewage Disposal ...,...................... 9-202
Service Water Heating
Facllltles ........................................ 9-202
Ventilation
General .......................................... 9-203
Non~Heatlng-Season
Ventilation ..................................... 9-204
Heating-Season Mechanical
Venttlatlon ..................................... 9·205
Heating and
Air-conditioning
General .......................................... 9-216
Required Heating Systems .......... 9-217
Design Temperatures ................... 9-217
General Requirements for
Heating and Air-conditioning
Systems ......................................... 9-217
Division B

Division B
9.33.5.
9.33.6.
9.33.7.
9.33.8.
9.33.9.
9.33.10.
9.34.
9.34..1.
9.34.2.
9.34.3.
9.35.
9.35.1.
9.35.2.
9.35.3.
9.35.4.
9.36.
9.36.1.
9.36.2.
9.36.3.
9,36.4.
9.36.5.
9.37.
9.37.1.
Heating and Air-conditioning
Appliances and Equipment ......... 9-218
Air Duct Systems .......................... 9-219
Radiators and Convectors ........... 9-224
Piping for Heating and Cooling
Systems ......................................... 9-224
Refrigerating Systems and
Equipment for Air-conditioning .. 9-225
Chimneys and Venting
Equipment ..................................... 9-225
Electrical Facilities
General .......................................... 9-226
Lighting Outlets ............................ 9-226
Emergency Lighting ..................... 9-228
Garages and Carports
Scope ............................................ 9-228
General .......................................... 9-228
Foundations .................................. 9-228
Walls and Columns ...................... 9-229
Energy Efficiency
General .......................................... 9-230
Building Envelope ........................ 9-231
HVAC Requirements .................... 9-242
Service Water Heating Systems .. 9-247
Energy Performance
Compliance ................................... 9-249
Objectives and
Statements .................................... 9-261
Fire and Sound
Resistance Tables ••••••••• 9-369
Span Tables ................... 9-445
Notes to Part 9 .............. 9-479
National Building COde of Canada 2015 Volume 2
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Fire and Sound Resistance Tables
NaUon11I Bui/ding Code of Canada 2015 Volume 2
Division B 9-369

Span Tables
I
•I•

Index
Abbreviations
acronyms, 1.3.2.1.
symbols and, 1.2.2.1.
terms and, 1.4.1.2.[AJ
A
1~~;;able solution , 1.1.2.1., 1.2.1.1.!AJ
~ r roof spaces, 3.6.4.4., 9.19.2.1.
, 6.3.3.4.
era, 1space ' .6.4.6., 9.18.2.1., 9.18.4.1.
fire dampers, 3.1.8.10.
hatchway to roof, 9.19.2.1.
horiz ntal service spaces, 3.6.4.5., 9.18.2.1.,
9.1 .4.1., 9.19.2.1.
HVAC equipment, 6.2.1.6., 9.33.4.4.
moke dampers, 3.1.8.11.
Access to exits
capacity, 3.3.1.17., 9.9.3.
rorridors in assembly occupancy, 3.3.2.6.
rorridor width, 3.3.1.9.
dead-end corridors, 9.9.7.3.
definition, 1.4.1.2.[Al
dimensions, 9.9.3.
doors, 3.3.1.13., 3.3.2.7., 9.9.6., 9.9.7.4.
doors, sliding, 3.3.1.12.
doors, transparent, 3.3.1.19.
dwelling units, 9.9.9.
Bame-spread rating, 9.10.21.6.
within floor areas, 3.3.1.3.
headroom clearance, 3.3.1.8., 9.9.3.4.
independent access to, 9.9.7.5.
lighting, 9.9.122.
podiums, terraces, platforms and contained open
spaces, 9.9.7.1.
residential occupancy, 3.3.4.4.
roofs, 3.3.1.3., 9.9.7.1.
service rooms, 9.9.7.5.
suites, 9.9.7.2.
transparent panels, 3.3.1.19.
travel distance, 9.9.7.6.
when exits are means of egress, 9.9.7.
width, 9.9.3.2., 9.9.3.3.
Access for firefighting
access routes, 3.2.5.4., 3.2.5.5., 3.2.5.6.
basements, 3.2.5.2., 9.10.20.2.
provisions, 9.10.20.
roof area, 3.2.5.3.
storeys below ground, 3.2.2.15.
storeys above grade, 3.2.5.1.
street frontages, 3.2.2.10.
Accessibility (see Barrier-free)
Access openings
construction barricades, 8.2.1.3.
HVAC systems, 6.8.1.1.
Access panels, 3.2.5.1., 9.10.20.1.
Access routes
design, 3.2.5.6.
location. 3.2.5.5., 9.10.20.3.
need for, 3.2.5.4.
self-service storage buildings, 3.9.2.3.
as streets, 3.2.2.10.
Adfreezing, 1.4.1.2.lA], 4.2.4.4.
Adhesives
ceramic wall tiles, 9.29.10.3.
ducts, 3.6.5.4., 9.33.6.4.
Administration of the Code, 2.2.(q
Admixtures
concrete, 9.3.1.8.
mortar and grout, 9.20.3.2.
Aggregate
for built-up-roofing, 9.26.11.1., 9.26.11.4.
for concrete, 9.3.1.1., 9.3.1.4., 9.3.1.7.
for mortar, 5.9.1.l., 9.20.3.1., 9.20.3.2., 9.29.10.2.
for stucco, 9.28.2.2., 9.28.5.l.
Air
circulation, 6.3.2.7., 9.33.6.7.
distribution, 9.33.6.11.
flow through and around insulation, 5.3.1.3.,
9.19.1.3., 9.25.2.3., 9.25.2.4.
leakage, 3.1.8.4., 5.1.1.l., 5.4.1.1., 5.9.3.4., 5.9.4.1.,
9.25.5.l.
leakage resistance, 5.4.1.l., 5.4.1.2., 9.13.4., 9.18.6.2.,
9.25.5.l.
makeup, 6.3.2.8., 9.32.3.8.
permeance, 5.4.1.2., 9.25.5.1.
tempering, 9.32.3.4., 9.32.3.8.
transfer, 5.1.1.1., 5.2.1.3.
Air barrier systems
airtightness, 5.4.1.1., 9.36.2.9., 9.36.2.10.
assemblies in contact with the ground, 9.13.4.,
9.25.3.6.
continuity, 5.4.1.2., 9.25.3.3., 9.36.2.9.
crawl space floors, 9.18.6.2.
and building size determination. 1.3.3.4.(Al
[A] _ Re(erent:e occursin Division A. (q - Reference OCCWS in Division C. All other references occur in Division B.
lndeX
.,,,,,.,Balldlnfl Code at c,,nad• 2015 VOiume 2

Conversion Factors
To Convert To Multiply by
·c "F 1.8 and add 32
kg lb.
2.205
kPa lbfftn.2(psi)
0.1450
kPa lbf/ft.2
20.88
kW Btu/h
3412
L gal. (imp.)
0.2200
Us galJmin (gpm) 13.20
Ix ft -candle 0.09290
m ft. 3.281
m2 ft.2 10.76
ms ft.3 35.31
mm in. 0.03937
ma/h ft.3/min (cfm) 0.5886
mis ftJmin 196.8
MJ Btu 947.8
N lbf 0.2248
ng/(Pa,s,m2) Btu/h 3.412

Canadian National building Code 2015

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Canadian National building Code 2015