National Building Code of Canada: 1965 (third printing)

(1)

OF CANADA 1965

(THIRD PRINTING)

Issued by the

ASSOCIATE COMMITTEE ON THE

NATIONAL BUILDING CODE

NATIONAL RESEARCH COUNCIL

Printed in Canada

Ottawa, Canada

Third Printing

including all Corrections and Revisions

to January 1967

Price $4.00

NRC No. 8305

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Ce document, ainsi que toutes les autrs sections du Code national du batiment, est egalement disponible en fran~ais. TOlltes d('mandes doivent etre adressees au Secretaire, Comite assode sur Ie Code national du Inltiment, Conseil national de recherches, Canada.

First Edition 1941 Second Edition 1953 Third Edition 1960 Fourth Edition 1965

The National Building Code and its various parts or sections may be obtained by writing to:

The Secretary,

Associate Committee on the National Building Code, National Research Council,

Ottawa 7, Canada.

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PREFACE

This advisory document has developed from the original National Building Code issued in 1941 jointly by the National Research Council and the Depart-ment of Finance. Revised editions were published in 1953 and 1960. This is, therefore, the Fourth Edition. Further Revised Editions will be published at five-yearly intervals. The Code is produced for the National Research Council by the Assot'iate Committee on the National Building Code.

The Associate Committee on the National Building Code consists of a group of ahout twenly-four Calladian citizens appointed for three-year terms by the Coullcii. They sit as individuals and not as representatives of any organization. The lIlajor task of the Committee is to promote the uniformity of building regulations throughout Canada. Continued study and improvement to maintain the National Building Code as a satisfactory document containing regulations which can be cOllveniently adopted or enacted for local use will always be an importallt part of the Committee's work.

The Associate Committec is generally representative of all major phases of huilding in Canada. Its direct responsibility for the preparation and publication of the Code ensures the indqwndence of this document. The staff of the Council are responsihle only for the necessary technical and secretarial work, all of which is done to the direction of the Associate Committee. This work is done within tht' Divisioll of Building Research, to which are referred the many research prohlt'llls that the lise and revision of the Code are continually revealing. In this way, the most IIp.to·date information is made available for the use of the Committee.

Tht' actual work of preparing new parts of the Code and of revlsmg l'xisting parts is delegated by the Associate Committee to special revision com-ll1itt('(,~. Engincers, architects, building officials, and other technical experts sit upon these committees in order that the resulting documents may represent cOIlh'mpOr,lrY practice in Canada, interpreted as necessary to frame the minimum regulatioIls of which the Code consists. These committees always issue drafts of tile !lew documents which they prepare. These are sent for comment to those who express interest in them. Three Advisory Groups, on Fire, Health and Structurc, l'<leh with representative memberships, keep the technical content of the Code under review, between revisions, and advise the Associate Com-mittee on technical problems.

Comments 011 the use of the Code and suggestions for its improvement will bl' welcome and may be sent to the Secretary, Associate Committee on the r\atiollal Building Code, in care of the National Research Council, Ottawa. If those who use this document will thus co-operate with those who have worked toward its preparation and revision, the true national character of the Code will be maintained and strengthened and its development as a satisfactory set of desirahle illliidillg regulations for use by muniCipalities and other agencies throughout Canada should steadily progress.

NATIONAL BUILDING CODE OF CANADA 1965

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The use of the Code in Canada is commended by the following

organizations:

Association of Canadian Fire Marshals

Association of Consulting Engineers of Canada

Canadian Association of Fire Chiefs

Canadian Labour Congress

Canadian Construction Association

Canadian Federation of Mayors and Municipalities

Canadian Underwriters' Association

Central Mortgage and Housing Corporation

Engineering Institute of Canada

National House Builders Association

Royal Architectural Institute of Canada

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hART

3 Use and Occupancy

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PART 4 Design

7 p.

8 p.

90 p.

Section 4.1 Structural Loads and Procedures 12 p. Section 4.2 Foundations .... 16 p. Section 4.3 Wood 52 p. Section 4.4 Plain, Reinforced and Gro·tted

Masonry 29 p. Section 4.5 Plain, Reinforced and Prestressed

Concrete. . . . 92 p. Section

4.6

Steel Construction

59

p. Section 4.7 Cladding 5 p .

./ PART 5 Materials... 5 p.

/ PART 6 Building Services 41 p.

/ PART 7 Plumbing Services 45 p.

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PART 8 Construction Safety Measures 24 p.

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PART 9 Housing 8 p.

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THE APPENDIX

14 p.

INDEX .. 6 p.

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A GUIDE TO THE USE OF THE CODE

This code is drafted in the form of a bylaw so that, with the addition of any necessary changes to Part 1: Administration, it may be adopted or enacted for legal use by any municipality in Canada. The arrangement of the Code is intended to facilitate its use and to permit its future revision without difficulty.

It is divided into nine parts, each complete in itself with only a minimum of cross reference. Each part is divided into sections and subsections which also are independent subclauses of the main subjects covered in the parts. Each subsection is further subdivided into articles.

A consistent numbering system has been used throughout the Code. The decimal system is used to indicate parts (Part 3), sections (Section 3.2), sub-sections (Subsub-sections 3.2.4.), and articles (Article 3.2.4.1.). A sentence which forms an article or part of an article may be subdivided into clauses indicated by (a), (b), etc., and these may be further subdivided into subclauses indicated by 0), (ii).

Where it is necessary to refer to other parts of the Code, the reference has been kept as short as possible. Where a reference is to sentence (1), the reference is to sentence (1) within the same article.

A summary of the arrangement follows:

Part 1: Administration

Part 1 contains those regulations that pertain to the efficient and effective application of the Code. In this Part are defined the powers, duties and responsibilities of those concerned.

Part 2: Definitions

Throughout the Code certain words and phrases appear in italic type. These are the terms which, for purposes of this document, have been defined to ensure understanding of their intended meaning. Terms such as "building", "storey", "approved", and "dwelling unit" are used throughout the Code. The definitions of such terms are contained in Part 2.

In other parts of the Code it was necessary to define certain terms. Such terms apply to only one part and are defined in that part. So that a complete list of all defined words is available, Part 2, besides containing the actual definition for general words and terms, also lists each word defined and indicates where its definition appears in the Code.

Part 3: Use and Occupancy

Here are assembled the requirements to ensure safety from fire and health hazards related to the occupancy of the building. Section 3.1 brings together as far as possible the interpretive material. This includes definitions, classifi-cations, and descriptions to explain such ternlS as noncombustible construction, heavy timber construction and fire separations. These interpretive clauses are followed by sections which cover regulations for fire safety based on the occupancy of the building and the occupancy of the particular floor areas, exit requirements, precautions to be taken in attic, duct and crawl spaces and special health regulations.

Included in these regulations are such subjects as flame spread, fire re-sistance, emergency lighting, ventilation, seating, windows, acoustic insulation and all other regulations based on occupancies except live loads.

Part 4: Design

This part is made up of seven sections. The first section (4.1) includes structural loads and general design conditions and procedures; Section 4.2 regulates foundation design and construction. Subsequent sections deal with the practice of designing in wood, masonry, concrete, steel and the materials that dad the building and protect it from the weather.

~uch of this part is comprised of specifications of the Canadian Standards Association. To avoid duplication, the CSA specifications for design in wood and steel have been included almost without change but with some necessary additions. The section on reinforced concrete design is an entirely new

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...

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ment and has been prepared by a special joint committee under the auspices of the Associate Committee and the Canadian Standards Association.

Part 5: Materials

It will be noted that this is a very short part but it does include an im-portant table with reference to minimum lumber grades for specific end uses. In order to render the Code a more satisfactory document from the legal point of view, all references to standard specifications for processes and materials have been taken out of the text of the bylaw and have been included in the special Appendix which appears for the first time in this edition. It is hoped that users of the Code will find this re-arrangement of information on materials to their convenience.

Part 6: Building Services

This part includes the regulations for designing heating, ventilating, elevator and othel; service equipment so that it may function efficiently without creating a hazard. These are installation requirements. The functions which such ser-vices are required to perform, such as the indoor temperature to be maintained or the amount of air to be supplied by mechanical ventilation and which are related to the occupancy of the building, are to be found in Part 3.

Part 7: Plumbing

Although plumbing is a service that could be classified under Building Services, the prominence and extent of its regulations warrant separate treat-ment. Size and quality of fixtures essential for personal service are dealt with, followed by requirements for pipes and fittings necessary to these fixtures. Subsequent sections are devoted to private water supply systems.

Part 8: Construction Safety Measures

This part of the Code deals with proVISIOns necessary to ensure the safety of the worker and the public during the construction of buildings. Re-quirements are presented for temporary service, handling of materials, demoli-tion, use of equipment and good housekeeping during construction.

Part 9: Housing

Part 9 is a short performance code setting forth the basic requirements for all types of residential construction. As will be noted from Subsection 9.1.2, technical details regarding residential construction are given in Supplement No.5. Part 9 is a legal document which can be used by any local building authority with or without reference to Supplement No.5.

The Appendix

This contains a complete listing of all standards and specifications which might be useful in supplementing the Code itself. Reference is contained in the Appendix to supplementary volumes containing either reproductions of standard documents or a guide to where they may be obtained.

Supplements

In a special loose-leaf binder the following technical supplements are available to support the contents of the National Building Code itself .

Supplement No.1: Climatic Information for Building Design in Canada

This contains information regarding climatic loads to be expected in all parts of Canada .

Supplement No.2: Fire Performance Ratings

This provides a guide to the determination of the fire resistance ratings of materials and constructions in relation to the provisions of the Code.

Supplement No.3: Structural Information for Building Design in Canada

This presents useful information regarding wind loads and other loads that must be considered in structural design.

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NATIONAL BUILDING CODE OF CANADA 1965

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Supplement No.4: Plumbin« Sketches

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These are illustrations to assist in the use of Part 7 of the Code.

Supplement No.5: Residential Standards

These are as noted under Part 9, Housing.

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Supplement No.6: Farm Building Standards

This document is a set of recommended standards for farm buildings other than houses .

..; Supplement No.7: Building Standards for the Handicapped

This short but important document is well described by its title. (Copies of all the Supplements may be obtained upon request from:

The Secretary,

Associate Committee on the National Building Code, National Research Council, Ottawa 7. Ontario.

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NATIONAL RESEARCH COUNCIL

ASSOCIATE COMl\'IITTEE ON THE

NATIONAL BUILDING CODE

1964 -1965

R. F. Legget (Chairman) E. A. Allcut D. C. Beam A. E. Bridges A. J. Cameron S. D. C. Chutter A. F. Duffus J. J. Dussault H. Elder J. H. Jenkins J. S. Johannson S. D. Lash G. C. Lount J. P. Lupien H. H. G. Moody G. S. MooneyO A. T. Muir

J.

H. Palma son B. Pelletier R. B. Rolland S. A. Sasso A. Tubby

A. E. Berry (ex officio) R. E. Bolton (ex officio) J. L. Davies (ex officio) C. G. E. Downing (ex officio) D. T. Wright (ex officio)

J.

M. Robertson (Secretary)

ADVISORY FIRE GROUP J. L. Davies (Chairman) D. M. Baird D. C. Beam

J.

E. Burns T. R. Durley R. S. Ferguson E. S. Hornby D. F. Jones M. J. Jones

J.

W. Marshall R. F. Martin C. W. Morgan K.

J.

Partington G. B. Pope

J. J.

Ruane L. Vaughan

G. W. Shorter (ex officio) M. Galbreath (Secretary)

ADVISORY HEALTH GROUP A. E. Berry (Chairman) V. S. Baker N. Basarsky T. V. Berry R. B. Bowser A. J. Cameron J. Connolly W. R. Edmonds L. Fontaine H. L. Hogge

*

Deceased July 1965. **Resigned. K. Izumi L. A. Kay R. A. Kennedy T. Lane R. D. McKay R. P. Opie O. H. Smith

J.

H. Storey F. J. Tourangeau W. B. Watson (Secretary)**

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ADVISORY STRUCTURAL GROUP D. T. Wright (Chairman) D. St·C. Anderson P. C. A. Brault C. D. Car~uthers J. F. Cutler A. Desautels R. H. Dunn H. Q. Colder R. W. Hurlburt J. Longworth P. Maguire S. J. Mazur R. L. ~lontador

J.

Pettick O. Safir J. Stonehewer D. L. Tarlton Wm. Viner

R. F. DeC race (ex officio)

M. W. Huggins (ex officio) W. C. ~1itchdl (ex officio)

R. B. Dryburgh (Acting Secretary) D. A. Lutes (Secretary)

ADVISORY HOUSING GROUP R. E. Bolton (Chairman) C. V. Antenbring C. E. Corbin H. B. Dickens M. C. Dixon J. E. Fortin P. N. Cross A. Hazeland C. C. Hipel W. C. Hoyle E. Larose R. A. Lemieux J. A. MacDonald A. May A. McClaskey C. J. McConnell R. P. Opie S. A. Shepherd A.

J.

E. Smith H. P. Smyth D. South R. A. Stevens R. A. W. Switzer

N. Connor (Associate Member) A. W. Stickel (Secretary)*

STANDING COMMITTEE ON RESIDENTIAL STANDARDS

M. C. Dixon (Chairman) C. Adams Wm. Cannon W. C. Connelly A. E. Diamond P. Dobush E. W. Frehs A. T. Hansen C. C. Hipel ~. B. Hutcheon (Chairman) J. E. Breeze A. Desautels F. W. King (Observer) W.

J.

MacNeill C. B. Pope

*

Resigned C. W. Jerram D. E. Kennedy J. M. Leitch (Mrs.) C. E. Locke A. T. ~1uir R. E. Pare

*

A. W. Stickel (Secretary) J. P. Vezina (Secretary)

FIRE TEST BOARD

J.

J. Ruane C. W. Shorter (Observer) E. F. Tabisz (Observer) R. C. \Vi150n ~L Galbreath (Secretary)

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FARM BUILDING STANDARDS

C. C. E. Downing (Chairman) C. L. Calver

J.

A. Choiniere E. L. Fowler H. L. Isabelle W. Kalbfleisch D. E. Kennedy

J.

Leach C. R. K. Lye

J.

McClenaghan

J.

E. Moles C. L. Montgrain E. B. Moysey

J.

A. Roberts L. M. Staley F. H. Theakston

J.

E. Turnbull

J.

K. W. Slater (Corresponding Member) D.A. Lutes (Technical Advisor)

J. P. Vezina (Secretary)

BUILDING STANDARDS FOR mE HANDICAPPED

1. Campbell (Chairman) C. N. Bennett B. R. Brown P. Cameron K. B. Davison M. C. Dixon J. Dottridge (Mrs.) F. Howard (Miss) D. W. Jonsson A. T. Mann J. L. Melville* G. W. Peck L. C. Smith (Mrs.) W. B. Watson J. P. Vezina (Secretary)

REVISION COMMITTEE ON USE AND OCCUPANCY

K. Izumi (Chairman) D. C. Beam C. H. Brundige T. R. Durley

J.

Elson R. B. Hebert A. \1. Henderson D. F. Jones L. A. Kay

J.

W. Marshall R. L. Montador R. A. W. Switzer

R. S. Ferguson (Technical Advisor) J. J. Shaver (Secretary)

REVISION COMMITTEE ON STRUCTURAL LOADS AND PROCEDURES J. Longworth (Chairman) R. H. \tilne E. \1. Rensaa \1. K. Thomas D. T. Wright \V. Wright \V. R. Schriever (Secretary)

REVISION COMMITTEE ON FOUNDATIONS

C. G. \ieyerhof (Chairman) J. I. Adams E. A. Cross W.

J.

Edm (Observer) II. Q. Golder X. D. Lea C. E. Lconoff

J.

B. Striowski K. Burn (Secretary)

NATIONAL Bt::ILDING CODE OF CANADA 1965

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REVISION COMMr1TEE ON MASONRY R. E. Johnson (Chairman) J. F. Cutler G. L. Fowler R. V. Hebert P. T. Mikluchin G. Venne T. Ritchie

1. R. Robinson (Corresponding Member) D. A. Lutes (Secretary)

J. M. Robertson (Acting Secretary)

JOINT COMMITTEE ON REINFORCED CONCRETE DESIGN M. W. Huggins (Chairman) G. Duncan Black D. M. Curzon A. B. Dove R. H. Dunn G. H. Foures B. A. Hesketh H. W. Hopkins R. W. Hurlburt R. N. McManus G. E. Munro G. C. Price F. B. Rolph O. Safk K. O. J. Sidwell W. G. Plewes (Secretary)

The above-noted revision committees were appointed by the Associate Committee for the special purpose of preparing the revised versions of the respective parts and sections of the Code that appear in this edition.

The Advisory Groups are continuing committees, the members of which each hold office for three years, the function of the Groups being to keep the entire Code under review with respect to its technical content in each of the three broad fields indicated by the group names, and to advise the Associate Committee of the results of the groups' studies.

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PART 1 ADMINISTRATION

Section 1.1

Short Title . . . .. .. . . .. . . .. . . .. . .. . . 3

Section 1.2

Application ... " . . . .. . . 3

Section 1.3

Responsibility of the Owner ...

3 Section 1.4

Prohibition... ...

3 Section 1.5

Permits ...

4 Section 1.6

Duties of the Owner ...

4 Section 1.7

Documents on the Site ... 5

Section 1.8

Penalties ...

5 Section 1.9

Duties of the Authority Having Jurisdiction ....

5 Section 1.10 Powers of the Authority Having Jurisdiction ....

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BYLAW NUMBER. . . .. . ..

tWHEREAS The ... . ... Act provides that a Municipal Council may by Bylaw regulate the erection and pro-vide for the safety of buildings.

THEREFORE the Municipal Council of the Corporation of the

... of ... enacts as follows:

PART 1 ADMINISTRATION

SECTION 1.1 SHORT TITLE

1.1.1. This Bylaw may be cited as the Building Bylaw.

SECTION 1.2 APPLICATION

1.2.1. Parts 2 to 8 inclusive of this Bylaw apply to all buildingsO other than those provided for in Part 9.

1.2.2. Part 9 applies to houses.

1.2.3. Where

(a) a bujlding is built, this Bylaw applies to the design and construction of the building;

(b) the whole or any part of a building is moved, this Bylaw applies to all parts of the building whether moved or not;

(c) the whole or any part of a building is demolished, this Bylaw applies to any remaining part and to the work involved in the demolition; (d) a building is altered, this Bylaw applies to the whole building except that

the Bylaw applies only to part if that part is completely self-contained with respect to the facilities and safety measures required by this Bylaw; (e) the occupancy of a building is changed, this Bylaw applies to all parts

of the building affected by the change.

SECTION 1.3 RESPONSmlLITY OF THE OWNER

1.3.1. Subject to the provisions of subsections 1.5.3. and 1.5.4., neither the granting of a permit nor the approval of the drawings and specifications, nor inspections made by the authority having 1urisdiction during erection of the

building shall in any way relieve the owner of such building from full respon-sibility for carrying out the work in accordance with the requirements of this Bylaw.

SECTION 1.4 PROHmITION

1.4.1. No person shall commence or continue any of the work referred to in Section 1.2 unless the owner of the building to be constructed, or in respect of which the work is to be carried out, has obtained a building permit.

1.4.2. No person shall commence or continue any part of the work referred to in Section 1.2., for which part a permit is required by this Bylaw, unless he has obtained a permit to carry out that part of the work.

1.4.3. No person shall commence or continue any part of the work referred to in Section 1.2 in respect of which a permit is required under any other Bylaw un-less he has obtained a permit under that Bylaw.

t

This preamble relates the Bylaw to enabling legislation and should be ad-justed to conform to the powers delegated to the Municipality.

o Italicized words are defined in Part 2.

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SECTION 1.5 PERMITS

1.5.1. Subject to Subsections 1.5.2. and 1.5.4. and Clause 1.1O.1.(d), where (a) an application has been made, and

(b) the proposed work set out in the application conforms with this Bylaw and all other applicable Bylaws,

the authority having iurisdiction shall issue the permit for which the application

is made.

1.5.2. Every permit is issued upon

(a) the condition that construction is to be started within 6 months from the date of issuing of the permit;

(b) the condition that construction is not to be discontinued or suspended for a period of more than one year; and

(c) such other condition as the authority having jurisdiction may deem

ad-visable.

1.5.3. The authority having jurisdiction shall refer to the Council plans and

specifications for any building or structure that is not provided for in this

Bylaw and for which an application for a building permit has been received. 1.5.4. No permit shall be issued for a building or structure referred to in

Sub-section 1.5.3. without the prior approval of the Council.

1.5.5. The application referred to in Subsection 1.5. L shall

(a) be made in the form prescribed by the authority having jurisdiction;

(b) be signed by the applicant;

(c) state the intended use of the building;

( d) include copies in duplicate of the specifications and scale drawings of the building with respect to which the work is to be carried out showing

(i) the dimensions of the building,

(ii) the proposed use of each room or floor area,

(iii) the dimensions of the land on which the building is, or is to be

situated,

( iv) the grades of the streets and sewers abutting the land referred to in

subclause (iii), and

(v) the position, height and horizontal dimensions of all buildings on the

land referred to in subclause (iii); and

(e) contain any other information required by this Bylaw or by the authority having jurisdiction.

1.5.6. The authority having iurisdiction may revoke or recommend to Council

the revocation of a permit where there is a violation of:

(a) any condition under which the permit was issued. or

(b) any provision of this Bylaw.

SECTION 1.6 DUTIES OF mE OWNER 1.6.1. Every owner of property shall:

(a) permit the authority having iurisdiction to enter any building or premises

at any reasonable time for the purpose of administering or enforcing this Bylaw;

(b) obtain, where applicable. from the appropriate authority, permits

relat-ing to building, zoning, grades, sewers, water mains, plumbing, signs,

blasting, street occupancy. electricity, highways, and all other permits

required in connection with the proposed work;

(c) give at least 48 hours' notice to the authority having jurisdiction of the

intention to start work on the building site;

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(d) give notice to the authority having jurisdiction

(i) where a foundation wall below land surface has been placed and before any backfilling of the excavation has been carried out, (ii) 00

(iii) as may otherwise be required by this Bylaw,

(e) give written notice to the autlwl'ity havillg iurisdictioll within 30 days of completion of the work described in the permit; and

(f) obtain an occupancy permitooO _{from the}_{authority having jurisdiction} prior to any

(i) occupancy of a building or part thereof after construction, wrecking

or alteration of that building or part, or

(ii) change in the class of occupancy of any building or part thereof.

1.6.2. Where tests of any materials are made to ensure conformity with the re-quirements of this Bylaw, records of the test data shall be kept available for inspection during the construction of the building and for such a period

there-after as required by the authority having jurisdiction.

SECTION 1.7 DOCUMENTS ON THE SITE

1.7.1. The person to whom a permit is issued shall, during construction, keep

(a) posted in a conspicuous place on the property in respect of which the

permit was issued a copy of the building permit or a poster or placard

in lieu thereof; and

(b) a copy of the approved drawings and specifications referred to in clause

l.S.S.(d)on the property in respect of which the permit was issued.

SECTION 1.8 PENALTIES

1.8.1. Any person who contravenes any prOVISion of this Bylaw is guilty of an offence and is liable, on summary conviction to . . . . 0000

SECTION 1.9 DUTIES OF mE AUTHORITY HAVING JURISDICTION

1.9.1. The authority having jurisdiction shall

(a) administer this Bylaw; and

(b) keep proper records of all applications received, permits and orders

issued, inspections and tests made, and shall retain copies of all papers and documents connected with the administration of his duties. SECTION 1.10 POWERS OF mE AUTHORITY HAVING

JURISDICTION

1.10.1. The authority having jurisdiction may

(a) enter any building or premises at any reasonable time for the purpose of

administering or enforcing this Bylaw;

(b) cause a written notice to be delivered to the owner of any property direct·

ing him to correct any condition where, in the opinion of the authority having jurisdiction, that condition constitutes a violation of this Bylaw;

(c) direct that tests of materials, devices, construction methods, structural assemblies or foundation conditions be made, or sufficient evidence or proof be submitted, at the expense of the owner, where such evidence

or proof is necessary to determine whether the material, device, con-struction or foundation condition meets the requirements of this Bylaw; (d) revoke (or recommend to Council the revocation of) or refuse to issue

a permit where in his opinion the results of the tests referred to in

clause (c) are not satisfactory .

•• Here each municipality or authority will insert the requirements for any

additional notification as necessary.

0 . . To apply only to those municipalities which require this permit. 0 • • • The Municipality can insert a penalty clause.

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TABLE OF CLIMATIC DATA FOR THE

MUNICIPALITY OF _ _ _ _ _ _

_

1. Winter 2% per cent Design

Temperature (Deg. F.) ... .

2. Winter 1 per cent Design

Tem-perature (Deg. F.)

. . . .. ..

3. July 2% per cent Design

Dry-bulb Temp. (Deg. F.) ... .

4. July 2% per cent Design

Wet-bulb Temp. (Deg. F.)

5. Annual Total Degree-days

be-low 65° F.

6. Maximum Fifteen-minute

Rain-fall (in.)

7. Maximum

One-day Rainfall

(in.) ... .

8. Annual Total Precipitation

(in.) ...

... .

9. Maximum Snow Load on the

Ground (lb. per sq.

ft.)

10. Maximum Wind Load (lb. per

sq.

ft.)

11. Earthquake Factor

Apply to Code

Requirement

6.3.1.8

7.5.11.5

4.1.3.14

4.1.3.7 4.1.3.11 (1)

4.1.3.15 (3)

The ahove Table has been provided for recording the values of major climate factors that affect building for each municipality using the Code. These factors may be obtained for any municipality from Supplement :Jo. 1 to the !\'ational Building Code or hy writing to the Secretary, Associate Committee on the :\ational Building Code, c/o the ~ational Rescan:h Council, Ottawa, Canada.

PART 1

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-NATIONAL BUILDING CODE OF CANADA 1965

PART 2 DEFINITIONS

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PART 2 DEFINITIONS

Definitions of Words and Phrases

Access to exits - see means of egress Admixture - defined in Section 4.5 Aggregate - defined in Section 4.5

Air-entraining admixture - defined in Section 4.5 Air gap defined in Part 7

Air washer - defined in Part 6

Alteration - with reference to a building means a change from one maior occupancy class or division to another) or a structural change such as an

addition to the area or height, or the removal of part of a building,

or any change to the structure such as the construction of, cutting into or removal of any wall, partition, column, beam, joist, floor or other

support, or a change to or closing of any required means of egress or a

change to the fixtures, equipment, cladding or trim where they are

regulated by this Bylaw

Apartment Building - defined in Part 9 Apartment house - defined in Part 3

Approved means acceptable to the authority having jurisdiction Ashlar - defined in Section 4.4

Assembly occupancy - defined in Part 3

Authority having jurisdiction - means the Municipal Council or, with respect

to the regulation of buildings, the building inspector; with respect to the

regulation of plumbing installations, the plumbing inspector; where the term 'appropriate authority having jurisdiction' is used, it means the responsible provincial officials with legal authority for controlling heating units: provincial fire marshals, gas inspectors, officers of provincial de-partments of labour, etc., in consultation with municipal building inspectors

Back-siphonage preventer defined in Part 7

Basement - means that portion of a building between two floor levels which

is partly undergrouud but which has at least one half of its height from finished floor to finished ceiling above adjacent finished grade as

approved

Bearing support - (as applying to masonry) - defined in Section 4.4 Bearing surface (for soils) - defined in Section 4.2

Bojler - defined in Part 6 Bond - defined in Section 4.4 Branch - defined in Part 7 Branch vent - defined in Part 7 Breeching - defined in Part 6

Building - means any structure used or intended for supporting or sheltering

any use or occupancy as set forth in this Bylaw

Building assembly - (for cladding purposes) - defined in Section 4.7 Building drain - defined in Part 7

Building sewer - defined in Part 7 Building trap - defined in Part 7

Business and personal servkes occupancy - defined in Part 3 Butt joint - defined in Section 4.3

Cavity wall- defined in Section 4.4

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Cellar - means that portion of a building between two floor levels which is partly or wholly underground and which has more than one half of its height, from finished floor to finished ceiling, below adjacent finished grade as approved

Cement - defined in Section 4.5 Central furnace - defined in Part 6 Chimney - defined in Part 6

Chimney connector - defined in Part 6 Chimney flue defined in Part 6

Chimney liner - defined in Part 6 C'rcuit vent - defined in Part 7 Cladding defined in Section 4.7

Clear water waste - defined in Part 7 Closed type heating system - defined in Part 6

Closure - means the complete assembly of a fire door or doors, or shutters

and equipment, including hardware, closing devices, frame and anchors

Coarse aggregate - defined in Section 4.5 Column - defined in Section 4.5

Column, simple - defined in Section 4.3 Column, spaced - defined in Section 4.3 Combination column defined in Section 4.5

Combined building drain - defined in Part 7 Combined building sewer - defined in Part 7 Combined sewer defined in Part 7

Combustible as pertaining to materials adjacent to, or in contact with, heat produ.,cing units, venting equipment, pipes and ducts defined in Part 6 (see also noncombustible)

Combustible dusts - defined in Part 3

Combustible fibres and sheets - defined in Part 3 Commercial and industrial occupancy defined in Part 3

Composite column defined in Section 4.5

Composite concrete flexural construction - defined in Section 4.5 Compressive strength of concrete defined in Section 4.5

Concrete - defined in Section 4.5 Concrete chimney - see chimney, Part 6 Connector, timber - defined in Section 4.3

Consistency - (as applying to concrete) defined in Section 4.5

Continuous vent - defined in Part 7 Cooking appliance defined in Part 6

Corrosinn resistant - defined in Section 4.4

Critical level (as applying to plumbing fixtures) - defined in Part 7

Curtain wall- defined in Section 4.4 Dampproofed - defined in Section 4.7 Dead load defined in Section 4.1

Deformed bar - defined in Section 4.5

Density (as applying to wood) - defined in Section 4.3 Depth (as applying to wood) - defined in Section 4.3 Design capacity (of foundations) defined in Section 4.2

Design properties (of soil or rock) - defined in Section 4.2 Diameter (of pipes, fittings, etc.) - defined in Part 7

Directly connected (as applying to plumbing) defined in Part 7

Drainage system - defined in Part 7

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Dual vent - defined in Part 7

Dwelling unit - means two or more rooms used or intended for the domestic use of one or more individuals living as a single housekeeping unit, with cooking. living, sleeping and sanitary facilities

Edge distance (as applying to timber construction) - defined in Section 4.3

Effective area of concrete - defined in Section 4.5

Effective area of reinforcement - defined in Section 4.5

Effective opening (as applying to plumbing) - defined in Part 7

End distance (as applying to timber construction) - defined in Section 4.3

Exhaust duct - defined in Part 6

Exit - see means of egress

Exit, access to - see means of egress Exit, horizontal-see means of egress Faced Wall - defined in Section 4.4

Factory-built chimney - see chimney, Part 6

Factory-built fireplace - defined in Part 6

Fibre saturation point - defined in Section 4.3

Fine aggregate - defined in Section 4.5

Fire escape - defined in Part 3

Fire load - see load, fire

Fire resistance rating - defined in Part 3

Fire retardant treated wood - defined in Part 3

Fire resistive construction - defined in Part 3

Fire separation - defined in Part 3

Fire wall - defined in Part 3

Fixture (as applying to plumbing) - defined in Part 7

Fixture drain - defined in Part 7

Fixture outlet pipe - defined in Part 7

Fixture unH - defined in Part 7

Flame spread rating - defined in Part 3

Flammable - defined in Part 3

Flood level rim (as applying to plumbing) - defined in Part 7

Floor area - means an area of any floor or story of a building which is occupied, or intended for occupatlCy; floor areas shall not be considered as exclud. ing exits, or attic, crawl or duct spaces except as permitted in this Bylaw

Flue - defined in Part 6

Flue outlet - defined in Part 6

Flue pipe - defined in Part 6

Forced air furnace - defined in Part 6

Foundation - defined in Section 4.2

Foundation-unit - defined in Section 4.2

Frame construction - defined in Section 4.3

Fresh air inlet (as applying to plumbing) - defined in Part 7

Frost-proof closet - defined in Part 7

Furnace - defined in Part 6

Garage, open air parking - defined in Part 3

Garage, repair - defined in Part 3

Garage, storage - defined in Part 3

Gas vent - defined in Part 6

Glue (as applying to wood) - defined in Section 4.3

Glued-laminated timber (Glulam) - defined in Section 4.3

NATIONAL BUILDING CODB 01' CANADA 1915

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Grade - means the average surface of the ground at the outside walls of any building, as determined by the authority having jurisdiction.

Grade (as applying to wood) - defined in Section 4.3

Ground water level - defined in Section 4.2

Gravity furnace - defined in Part 6

Grout (see mortar)

Grouted masonry - defined in Section 4.4

Hazardous substance - defined in Part 3

Header (as applying to plumbing) - defined in Part 7

Heat exchanger - defined in Part 6

Heating appliance - defined in Part 6

Heavy timber construction - defined in Part 3

Height (as applying to masonry) - defined in Section 4.4

High occupant load - see load, hiilh occupant Hollow unit - defined in Section 4.4

Hotel Or motel-defined in Part 3

House - defined in Part 9

House, lodging - defined in Part 3

Indirectly connected (as applying to plumbing) - defined in Part 7

Individual vent (as applying to plumbing) - defined in Part 7

Infirm persons - defined in Part 3

Institutional occupancy - defined in Part 3

Interceptor (as applying to plumbing) - defined in Part 7

Interior finish material-defined in Part 3

Joist defined in Section 4.3

Laminations (as applying to wood) - defined in Section 4.3

Lateral support (as applying to masonry) - defined in Section 4.4

Leader - defined in Part 7

L.ghtweight aggregate - defined in Section

4.5

Limiting distance - defined in Part 3

Liner - see chimney liner Live load defined in Part 4.1

Load bearing - as applied to a structural member or system of structural mem-bers means that such memmem-bers are subjected to applied loads other than own weight.

Load bearing (for purposes of determining fire protection) - defined in Part 3

Load duratton - defined in Section 4.3

Load, fire - defined in Part 3

Load, high occupant - defined in Part 3

Load, occupant - see occupant load

Load sharing system (as applying to timber construction) - defined in Section 4.3

Loop vent - defined in Part 7

Lumber, nominal size - defined in Section 4.3

Lumber, rough - defined in Section 4.3

Lumber, sawn - defined in Section 4.3

Lumber, structuraUy graded - defined in Section 4.3

Lumber, yard defined in Section 4.3

Main vent - defined in Part 7

Masonry - defined in Section 4.4

Masonry or concrete chimney - see chimney, Part 6

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Masonry chimney see chimney, Part 6 Masonry (rubble) - defined in Section 4.4

AJeans of egress - means a doorway, hallway, corridor, lobby, stair, ramp or

other facility or comhination thereof provided for the escape of persons from a building, floor area or room to a puhlic thorollghfart, or other approved open space; mealls of egress include exits and access to exits Exit - means that part of a mealls of egress which leads from the floor area

it serves, including any doorway leading dirt'ctly from a floor area, a

public thoroughfare or an aJlwor;ed open space

Exit, access to - means that part of a mea/lS of egress within a floor area \\'hich

provides access to an exit serving the floor area

Exit, horizontal - means the connection by a bridge, balcony, vestibule or

doorway of two floor areas at substantially the same level; such floor areas being located either in different buildings or located in the same building and fully separated from each other

Mercantile OCCUIJallCY - defined in Part 3

Metal chimney - see chimney, Part 6

Moisture content (as applying to wood) - defined in Section 4.3 Mortar - defined in Section 4.4

Motel - see hotel

Net cross - sectional area (in masonry) defitwd in St·ctioll 4.4. Nominally horizontal (as applying to plumbing) - defined -in Part 7 Nominally vertical (as applying to plumbing) - defined in Part 7

Noncombustible (as applying to materials in building generally) - defined in

Part 3

Noncombustible (as applying to materials adjacent to heating equipment) -

de-fined in Part 6

Noncombustible construction - defined in Part 3 Noncorrosive - defined in Section 4.4

Occupancy - means the use or intended use of a building or structure or part

thereof for the shelter or support of persons, animals or property

Occupancy, major means the principal occupancy for which a building or

part of a building is used or intended to be used; for the purposes of

the classification of buildings according to occupancy, a major occupancy

shall be deemed to include the subsidiary occupancies which are

con-tingent upon it

Occupant load defined in Part 3

Offset (as applying to plumbing) defined in Part 7

Opening, vertical means an opening in a floor between stories of a building

or in a ceiling between a story and an attic space. It shall include openings for stairs, elevators, air wells and dumbwaiters, but shall not generally include openings for pipes, heating or ventilating ducts or electrical conduits

Owner - means any person, firm, corporation or agent controlling the property

under consideration

Panel wall- defined in Section 4.4

Partition - means an interior non-Ioadbearing wall one storey or part-storey in

height

Pedestal (as applying to concrete) defined in Section 4.5

Perimeter heating system - defined in Part 6

Permit - means a permission or authorization in writing by the authority having jurisdiction to perform work regulated by this Bylaw and in the case of

an occupancy permit to occupy any building or part of a building

Pier - (as applying to Foundations) defined in Section 4.2

Pier - (as applying to Masonry) defined in Section 4.4

Pilaster - defined in Section 4.4

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Pile - defined in Section 4.2

Plain bar - defined in Section 4.5 Plain concrete - defined in Section 4.5 Plenum - defined in Part 6

Plumbing contractor - defined in Part 7 Plumbing system - defined in Part 7

Ply (as applying to wood) - defined in Section 4.3 Plywood - defined in Section 4.3

Pole construction - defined in Section 4.3 Potable water - defined in Part 7 Precast concrete - defined in Section 4.5

Preservative treatment (wood) - defined in Section 4.3 Prestressed concrete defined in Section 4.5

Private sewage disposal system defined in Part 7

Proportions (as applying to concrete) - defined in Section 4.5 Pyroxylin plastic defined in Part 3

Range (as applying to heating) - defined in Part 6 Reinforced concrete - defined in Section 4.5 Reinforcement - defined in Section 4.5

Relief vent - defined in Part 7

Residence type (as applying to heating and ventilating equipment) - defined in

Part 6

Residential occupancy - defined in Part 3 Return duct - defined in Part 6 Rolling shear - defined in Section 4.3

Room heater defined in Part 6

Sanitary building drain defined in Part 7

Sanitary building sewer - defined in Part 7 Sanitary drainage system - defined in Part 7 Sanitary sewer - defined in Part 7

Scarf - defined in Section 4.3 Scarf ioint - defined in Section 4.3 Separation, fire defined in Part 3

Service condition (wood, dry and wet) - defilled in Section 4.3 Service water heater - defined in Part 6

Sewage - defined in Part 7

Sheathing (as applying to wood) - defined in Section 4.3 Shrinkage (as applying to wood) - defined in Section 4.3 Size (as applying to pipes, fittings, etc.) - defined in Part 7 Slenderness ratio - defined in Section 4.3

Smoke control zone - defined in Part 3 Smokestack - see chinmey, Part 6 Soil-or-waste pipe - defined in Part 7 Soil-or-waste stack - defined in Part 7 Solid masonry - defined in Section 4.4 Solid unit - defined in Section 4.4 Space heater - see room-heater.

Space heating appliance - defined in Part 6

Specified strength of concrete - defined in Section 4.5 Splitting tensile strength defined in Section 4.5

Sprillklered defined in Part 3

DEFINITIONS

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Stack vent - defined in Part 7

Stiffener (as applying to wood) - defined in Section 4.3

Storey - (as applying to the height of a plumbing stack) - defined in Part 7 Storey - means that portion of any building which is situated between the top

of any floor and the top of the floor next above it; and if there is no floor above it, that portion between the top of such floor and the ceiling above it.

Storey, first - means the storey with its floor closest to grade and having its ceiling more than 6 ft. above grade

Storey. second - means the storey located immediately above the /irst storey Storm building drain - defined in Part 7

Storm building sewer - defined in Part 7 Storm drainage system - defined in Part 7 Storm sewer - defined in Part 7

Storm water - defined in Part 7 Stove - defined in Part 6 Streets - defined in Part 3

Strength test (for concrete) - defined in Section 4.5 Stressed skin - defined in Section 4.3

Structurallightwetght concrete - defined in Section 4.5 Stud - defined in Section 4.3

Subsoil drainage pipe - defined in Part 7 Sump - defined in Part 7

Supply duct - defined in Part 6 Surface water - defined in Section 4.5

Theatre - defined ih Part 3 Trap - defined in Part 7 Trap, building - see building trap Trap dip - defined in Part 7 Trap seal - defined in Part 7 Trap weir - defined in Part 7 Unit heater - defined in Part 6 Vapour barrier - defined in Section 4.7 Veneer - defined in Section 4.4 Vent connector defined in Part 6

Vent pipe (as applying to plumbing) - defined in Part 7 Vent stack - defined in Part 7

Venting (as applying to heating and ventilating equipment) - defined in Part 6 Venting system (as applying to plumbing) - defined in Part 7

Wall, fire - see fire wall Warm-air furnace - see Furnace

Wllter;Cemellt ratio - defined in Section 4.5 WaterJJToof defined in Section 4.7

Water service lJipe defined in Part 7

Water s!Jstem (as applying to plumbing) - defined in Part 7 Wet vent defined in Part 7

Wood cOllstructioll defined in Pint 3

\Vood preservative - see preservative, Section 4.3 W!Jthe defined in Section 4.4

Yield slreligth or yield poillt - lIe fined in SE n 4.5

Yoke vellt defined in Part 7

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..

--~---~-~~---~ ...

--~-~-

..--NATIONAL BUILDING CODE OF CANADA 1965

PART 3 USE AND OCCUPANCY

I

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Section

3.1. Subsection 3.1.1.

Subsection 3.1.2.

Subsection 3.1.3.

Section

3.2. Subsection 3.2.1.

Subsection 3.2.2.

Subsection 3.2.3.

Subsection 3.2.4.

Subsection 3.2.5.

Subsection 3.2.6.

Subsection 3.2.7.

Subsection 3.2.8.

Subsection 3.2.9.

Subsection

~.2.

1 O.

Subsection 3.2.11.

Section

3.3. Subsection 3.3.1.

Subsection 3.3.2.

Subsection 3.3.3.

Subsection 3.3.4.

Subsection 3.3.5.

Subsection 3.3.6.

Subsection 3.3.7.

PART 3

Interpretation '"

3 Definitions ...

3 Classification of Buildings by

Maior Occupancies ...

5 Meaning of Terms ...

7 Regulations Applying to Buildings

14 Interpretation ...

14 Standards of Fire Protection ....

15 Requirements to Resist Fire Spread and

Collapse for Buildings of Various

Sizes and Areas ... . .. ... 22

Regulations to Resist Fire Spread

Between Buildings

. . . ..

53 Emergency Ughting

58 Regulations for Certain Service Rooms

59 Ventilation for Explosive Substances .. 60

Occupancy Combinations ...

Provisions For Fire Fighting

Fire Alarm System Requirements

Standpipe and Hose System

Requirements

Requirements for Fire Safety within

Floor Areas

Requirements Applying to All

Floor Areas

Indoor Places of Assembly

Outdoor Places of Assembly

Floor Areas Intended for Institutional

Occupancy

Floor Areas Intended for

Residential Use

Floor Areas Intended for Business

or Merchantile Use

Floor Areas Intended for Industrial

and Storage Use ....

60

61

64

65

68

69

70

USE AND OCCUPANCY

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(28)