Canadian Code for Residential Construction: (Residential Standards): 1970

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• NATIONAL RESEARCH COUNCIL OF CANADA

ASSOCIATE COMMITTEE ON THE

NATIONAL BUILDING CODE

REVISIONS

to the

CANADIAN CODE FOR RESIDENTIAL

CONSTRUCTION

(RESIDENTIAL STANDARDS)

1970

Ottawa

November 1973

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PREFACE

The majority <if the revisions contained in this pamphlet are from Change Series No, 3 to the National

and appear in hold-face However. also included are a number of additional changes that affect the Code for Residential ConMrl.lction which are in light-face type, Changes from Change Series No, I and 2 have heen incorpurated inlO the second printing (November 1972) of the Canadian Code for Residential Construction.

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REVISIONS

to the

CANADIAN CODE

FOR

RESIDENTIAL CONSTRUCTION

(RESIDENTIAL STANDARDS)

1970

The Associate Committee on !he National Building Code recommends that the following revisions based on Change Series No.3 to the National Building Code and a number of additional changes that affect the Canadian Code for Residential Construction only be inserted in the second printing (November 1972) of the Canadian Code for Resi-dential Construction.

Page Code Requirement Revision

2 2A

.:t

2A 8 Table 3C 9 4A 13 5E(3) 13 5E(5)

In the first line of the definition for "fire stop flap" replace "fire separations" with "assemblies required to have a fire-resistance rating and" .

Delete definition for "noncombustible" and substitute:

"Noncombuj·tible (as applying to an elementary building material) means that such material conforms to CSA B54.1-1972, 'Specifi-cation for Determination of Noncombustibility in Building Materi-als'."

In the sixth column, opposite the entry for "Stud wall framing (load-bearing membersr .. insert the grade designation "Stud" between "Standard" and "No.2".

Delete and substitute:

"When the size of, and cunnections for structural members are not given in this Code, the memhersand their connections shall conform to Part 4 of the National Building Code of Canada 1970, except that design live loads and deflection limits shall conform to 4B to 4F." Delete anJ substitute:

"Except as provided in (4). every dwelling unit shall have a kitchen counter at least I ft 10 in. in depth providing at least 141/2 sq ft of work surface. including the area occupied by the sink. and 6 lineal feet of cabinet front. Counter work surface depth greater than I ft

10 in. shall not be included in calculating the required area." Delete and add new Articles 5E(4) and 5E(5) as follows and change former 5E(4) to read 5E(6):

"(4) Every bachelor dwelling unit shall have a kitchen counter at least I ft 10 in. in depth providing at least II sq ft of work surface. including the area occupied by the sink. and 3 lineal feet of cabinet

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• Page Code Requirement 13 5E(5) 16 6D( I) 17 6E(I) 17 6E(2) 17 6F(2) 21 8B(1) 23 8G(4) 24 8G 25 28 29 30 30 31 35 9C(3) 9H(6) 9K(3) 9K(4) 10A(4) tOE IOH(l9) Revision

front. Counter work surface depth greater than 1 ft. JO in. shall not be included in calculating the required area."

(5) In bachelor dwelling units. the shelf area required in (6) may be reduced to 16 sq f1. with 12 sq ft of this area to be at least II in, in depth. and with at least 91/~ in. min, clearance between shelves,"

In the first line change "CSA 0132.2-1969'" to read "CSA 0\32.2-1972".

In the first line change "CSA 1969" to read "CSA 0132.2-1972".

In the first and second lines change "CGSB 82-GP-l (1964)" to read "CGSB 82-GP-la (1972)". In the third line change "CGSB 82-GP-2 (1964)" to read "CGSB 82-GP-2a (1972)".

In the first line after "sJde lights" add "greater than 18 in. in width". Delete and renumber former Articles 8B(2) to 8B(4) as Articles 8B(1) to 8B(3), respectively.

"Except as permitted in (5) and (6), a handrail shall be provided on at least one side of stairs less than 44 in. in width, and on two sides of stairs 44 in. in width or greater."

Add new Article 8G(l5) as follows and renumber former Article 8G(15) as 8G(16):

"Balustrades or guards around exterior balconies shall be designed so that no member, attachment or opening located between 4 in. and

36 in. above the balcony floor will facilitate climbing." Delete and substitute:

"Except as provided in 9F. the minimum aggregate width of exits at ground level shall be not less than one unit (see (6» per 90 persons. The minimum aggregate width of exits. other than at ground level, shall be one unit per 30 persons."

In the second line add the words "each of' before the word ·'its". Delete and substitute:

"In a building having an occupant load of over 100 persons, every exit and public corridor shall be provided with emergency lighting." Delete last sentence and substitute:

"Where incandescent lighting is provided, lighting equal to 1 W per 10 sq ft of floor area shall be considered to meet this requirement." In the seond line change "Part 3" to read "Part 6".

Delete Articles 10E (1) to 10E(8) and substitute new Article 10E(1) as follows:

"Where a wall, floor or roof assembly is required to be of noncom-bustible construction, comnoncom-bustible elements shall be limited in conformance with the requirements in Article 3.1.4.5. in Part 3 of the National Building Code of Canada 1970." Renumber 10E(9) and 10E(10) as IOE(2) and 10E(3), respectively.

"Combustible drain, waste and vent piping shall not be used in a

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Page Code Requirement 35 10"(19) 35 101(6) 38 10K 39 IOM(9) 39 IOM(13) 40 ION(3) 41 ION(7) 41 ION(8) 43 IIA(2) 44 12A(I) 46 13G 47 14A(3) 47 14C(l) 49 Table 15A Revision

plumbing system within a building where part of the system is located within or passes through a fire separation, except that where drain, waste and vent piping penetrates through a vertical fire separation, the piping on one side of the separation may be combustible, provided the combustible piping is not located in a vertical shaft or in a fire separation."

In the second line change "NFPA 1971" to read "NFPA 82-1972".

Add new Article IOK( 13) as follows:

"At least one refuse chute shall be provided in every building exceeding three storeys in building height."

In the third line change "Article 3.1.7.1. in Part 3" to read "Article 6.2.4.9. in Part 6".

"A door between an attached or built-in garage and a dwelling unit shall be tight fitting and weather stripped to provide an effective barrier against the passage of gas and exhaust fumes, and shall be fitted with a self-closing device. A doorway between an attached or built-in garage and a dwelling unit shall not be located in a room intended for sleeping."

"The limiting distance shown in Table IOC may be reduced provided it is not less than the square root of the aggregate area of unpro-tected openings in an exposing building face."

Revise the third sentence to read:

"Where the limiting distance is less than 2 ft, the exposing building face shall be clad with noncombustible material."

"The exposing building face of a detached garage that serves one dwelling unit only shall have a fire-resistance rating of at least % hr, except that no fire-resistance rating is required where the limiting distance is 2 ft or greater. The exterior cladding of such garages is not required to be of noncombustible material."

In the second line change "ASTM E-90-66T" to read "ASTM E90-70".

Add the following at tbe end of the article:

"In localities where termites are known to occur, all stumps, roots and other wood debris shall be removed from the soil to a minimum depth of 1 ft in unexcavated areas under a building."

Delete.

Delete and renumber Article 14A(4) as 14A(3). Revise first line to read:

"Drain tile and drain pipe used for foundation drainage shall conform to the following:"

In the fourth line change "ASTM 65" to read "ASTM C412-72".

Delete Note (l) and substitute:

"(I) Sizes are based on columns spaced 10 ft O.c. For other column

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.Page Code Requirement 49 Table 15A 50 15E(1) 52 53 54 62 64 64 64 65 65 61 69 69

161

17D(2) 18D(1) 200(1) 21A(4) 21C(1) 21C(2) 21C(3) 21C Table 21C 23B(3) 23C(l) Revision

spacings, footing areas shall be adjusted in proportion to the distance between columns."

In the third line after "omitted" add the words "in localities where termites are not known to occur".

Add new Subsection 161 as follows: "I. JOINTS

(1) In localities where termites are known to occur, joints between slabs-on-ground and foundation walls, and spaces around pipes, conduit or ducts that penetrate such slabs shall be filled with bitumen or other filler approved for this purpose."

In the third line change "%-in." to read "¥I-in.". In the fourth line change "31_{,4-in." to read "3-in.".}

Add the following at the end of the article:

" ... , except that in localities where termites are known to occur, the clearance shall be not less than 18 in., unless the joists are pressure treated with an approved chemical that is toxic to termites". Delete the first two lines and substitute:

"Where the interior finish of the exterior walls of a building is a type which may be damaged by moisture, exterior masonry walls, other than cavity walls or walls that are protected for their full height by a roof of a carport or porch, shall be parged on the interior surface and covered with".

In the third and fourth lines change "CGSB 9-GP-2(1951)" to read "9-GP-2a(1911)" and "Sheathing" to read "Cellulosic Fibre". At the end of the article add the following:

"or CSA BI49.2-1969, 'Installation Code for·Propane Burning Appliances and Equipment" and Supplement No.1, 1911". In the first line after "firebrick" add the words "asbestos cement". In the first line change "A..~TM C315-56(1965)" to read "ASTM C315-56( 1912)".

In the first line change "ASTM C64-61" to read "ASTM C64-12". Add new Article 21C(4) as follows and renumber existing Articles 21C(4) and 21C(5) as Articles 21C(5) and 21C(6), respectively: "Asbestos cement chimney liners shall conform to CGSB 34-GP-Ilb(1910), 'Pipe: Asbestos Cement, Flue'. Such liners shall not be used where the flue gas temperature exceeds 100°F."

In Column I, Items 2, 3 and 4 change "O.0129-in." to "O.OI3-in.", and in Item 6 change "O.0259-in." to "O.021-in.".

"W ood framing members that are not pressure treated with a wood preservative, and which are supported on concrete in contact with the ground or fill, shall be separated from the concrete by at least 2-mil polyethylene film, 45-lb roll roofing or other approved dampproofing materials, except that such dampprooting is not required where the wood member is at least 6 in. above the ground." In the first line after "wire nails" add "or common spiral nails".

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• Page Code Requirement Revision 71 23F(2) 71 23F(4) 74 23L(1) 76 23M(I) 76 23M (9) 77 Table 23E

Add the following at the beginning of the article: "Except as provided in 23F(4), .. ,"

Add new Article 23F(4) as follows:

"Buildings not more than 14 ft in 'width and not more than one storey in building height may be anchored by means of corrosion-resi.,tant steel rods or cables of at least tlz-in. diameter, attached to the build-ing frame near each corner of the buildbuild-ing in a manner that will develop the full strength of the rod or cable. Each such rod or cable shall be anchored to the ground by means of ground anchors having a withdrawal resistance of not less than 35 lb per lineal foot length of the building."

In the first line change "partitions" to read "walls".

Change "Roof and ceiling framing members" to read "Roof rafters and joists and ceiling joists",

Delete last sentence. Delete and substitute:

Table 23E

MINIMUM RAFTER-TO-JOIST NAILlNG(1·2) (Unsupported Ridge)

Rafter Tied to Every Joist Rafter Tied to Joist Every 4 ft Building Width

I

Building Width Building Width f

Building Width

up t(l~26 It up t(l~32 ft

up to 26 ft up to 32 ft

Roof Snow Load.lh/sq ft

Roof Rafter 20 psf 30 psf 40 psf 20 psf 30 psf 40 psf 20 psf 30 psf 40 psf 20 psf 30 psI' 40 psf

Slope Spacin'g or or or or or or or or

less more less more less more les~ more

4112 16 in. 4 5 6 5 6 II II 24 in. 6 II 9 8 II II 5112 16 in. 4 4 5 5 6 7 7 9 9 -24 in. 5 6, 8 7 8 II 9 6112 16 in. 4 4 4 4 4 5 6 8 9 8 It 24 in. 4 5 6 5 6 8 6 8 9 8 II 7112 16in. 4 4 4 4 4 4 5 6 8 8 II 24 in. 4 4 5 5 6 7 5 6 8 7 8 II 9112 16 in. 4 4 4 4 4 4 4 5 6 5 6 7 24 in. 4 4 4 4 4 5 4 5 6 5 6 7 12112 16 in. 4 4 4 4 4 4 4 4 4 4 4 5 24 in. 4 4 4 4 4 4 4 4 4 4 4 5 Col.I 2 3 4 5 6 7 8 9 10 II 12 J3 14

Notes to Table 23E ( I IN ails not less than 3 in

(2)Ceilingjoisl~ shall be fastened together with at least one more nail per joist sphce than required for the rafter-to-j()lst connec·tlOn

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,Page Code Requirement 79 230 80 23Q(4) 84 85 85

87

88 89 26C(2) 26F(2) 26F(4) 27B(1) Table 27A 27E(1) Revision

Add new Article 230(6) as follows:

"Asphaa-coated or asphalt-impregnated fibreboard at least 7/16 in. thick conforming to CSA A247.2-1969. 'Insulating Fibreboard Sheathing'. may be used as a roof sheathing oYer supports spaced not more than 16 in. o.c., prm'ided the roofing cunsists of a continu-ous sheet of gah'anized steel of at least 30 GSG or a continucontinu-ous sheet of aluminum of at least 0.024 in. in thickness. All edges of such sheathing shall be supported by blocking or framing:'

Delete the first sentence and substitute:

"Sheathing paper may be omitted beneath siding where the joints in the siding are formed in such a manner as to effectively resist the passage of wind and rain. This requirement may be met by having all edges of panel-type siding directly supported by framing members, with joints between adjacent panels caulked and the vertical joints covered with battens or shiplapped or otherwise matched." In the fifth line change "CGSB 41-GP-14(1961), 'Polystyrene: Cellular"" to read "C(;SB-41-GP-14a(l972), 'Thermal Insulation, Expanded Pol)'styrene' ".

In the sixth line change the title to read "Polyurethane: Rigid, Cellular, for Thermal Insulation and Other Applications". In the fourth line after "concrete" add the word "walls".

Delete and substitute and renumber Articles 26F(5) and 25F(6) as 26F(6) and 26F(7). respectively:

"(4) Where an interior frame wall meets an exterior wall required to have vapour barrier protection. the vapour barrier protection shall extend between the exterior and interior 'l'alls to form continuous protection at the wall intersection.

(5) Where an interior frame wall meets a ceiling required to have vapour barrier protection, thc \'apour barrier protection shall extend over the top of the wall or beneath the top wall plate to form contin-uous vapour protection for the ceiling."

Add the following standard after "CGSB 37-GP-2Ic(l971), 'Roof Coating: Tar Cutback, Fibrated' ". "CGS!141-GP-6b(l973), 'Sheets: Thermo-setting, Polyester Plastics, Glass Fiber Reinforced'''. In the thirteenth line change "CSA A123.3-1971. 'Asphalt Roofing Surfaced with Powdered Mineral Matter' " to read "CSA A 123.3-1973, 'Asphalt Roofing Surfaced with Fine Mineral Matter' ". In the second column change "I,,, in 12" to read "0 in 12" wherever it occurs.

In the first column below "Clay Tile" add "Glass Fibre Reinforced Poly'cster Roofing Panels", and in the second and third columns opposite this entry add "3 in 12" and "no limit", respectively. In the second column opposite the entl} for "Roll Roofing: Cold application felt" change hl/z in 12" tli read ''1/4 in 12".

"Except as provided in (3), eave protection shall be provided on shingle, shake or tile roofs, extending from the edge of the roof a minimum distance of 3 ft up the roof slope to a line not less than 12 in. inside the inner face of the exterior wall."

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'Page Code Requirement 89 27E(2) 91 27J(1) 92 27J(3) 93 Table 270 93 27 95 95 % 97 280(3) 28E( I) Table 28A 28H(1) Revision

Delete last sentence.

Delete and renumber Articles 27J(2) to 27J(8) as Articles 27.1( I) to 27J(7). respectively.

In the first line delete the words "Where wind-drhen snow occurs". Add the following to Note (1):

"Where the deck consists of pl~'wood or particleboard. no dry felts or dry sheathing paper need be prm'ided where the joints in the plywood or particleboard are taped. the plywood or particleboard deck primed with asphalt and three plies of asphalt paper mopped with asphalt and Hood coated as described in the table."

Add new Subsection 270 as follows and renumber former 270 as

27P:

"0. GLASS REINFORCED POLYESTER ROOFING

(1) Where glass reinforced pol~'ester roofing panels are not supported by roof decking but span between spaced supports. the panels shall be designed to support the design roof load in conformance with good engineering practice."

Change second and third lines to read:

"CGSB 19-GP-3b(1972). 'Sealing Compound: Two Component. Polysulphide Base, Chemical Curing' ".

Change fourth and fifth lines to read "CGSB 19-GP-5b(1971). 'Sealing Compound: One Component. Acrylic Base. Soll'ent Curing .. •.

In the sixth line delete "CGSB 19-GP-6a(1970). 'Compound: Caulk-ing. Oil Base' ".

Beneath the tenth line add "CGSB 19-GP-14(1970). 'Sealing Compound: One Component. Butyl-Polyisobut~'lene Base. Solvent Curing' ".

In the second line before "or" add "furring members". Add the following to Note (1):

"Staples of the same length as required for nails may also be used, provided the staples are corrosion-resistant. compatible with the siding material and positioned to permit expansion and contraction of the siding."

"Asbestos cement shingles and sheets shall conform to one of the following:

CGSB 34-GP-4b(1970). 'Siding: Asbestos Cement. Shingles. and Clapboards"

CGSB 34-GP-5c( 1970). Sheets: Asbestos Cement. Corrugated" CGSB 34-GP-14a(I969). 'Sheets: Asbestos Cement. Flat. Decora· tive"

CGSB 34-GP-16b( 1970). 'Sheets: Asbestos Cement, Flat. Fully Compressed' ,

CGSB 34·GP-17c(l970). 'Sheets: Asbestos Cement. Flat Semicom-pressed',

CGSB 34-GP·2Ia( 1970). 'Sheets: Sandwich. Asbestos Cement. and Fibreboard'. "

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page Code Requirement 98 28J(1) 99 28 101 105 107 107 107 108 108 109 111 111 112 112 118 290(6) 30H(1) 301(2) Table 30C 3OJ(1) 30L(2) 30M(4) 318(3) 31E(1) 31F(3) 32 32B(I) 34B(3) Rel"ision

"Hardboard siding shall conform to CGSB ll-GP-5( 1972), 'Precoated Hardboard for Exterior Use'."

Add new Subsection 28M as follows and renumber former Subsec-tion 28M and 28N ~s 28N and 280, respectivel~":

"M. VINYL SIDING

(1) Vinyl siding, including flashing and trim accessories, shall conform to CGSB 41-GP-24(1972), 'Siding, Soffits and Fascia, Rigid Vinyl'.

(2) The attachment orvinyl siding shall conform to the requirements in 28E for metal siding.

(3) Vinyl siding shall be applied over sheathing or other backing that will provide continuous support for the siding."

"Stucco lath shall be fastened in conformance with 28E." Change "CSA A82.27-1963" to read "CSA A82.27-1972". Delete and substitute:

"Where plywood for interior finish is grooved, the grooves shall not extend through the face ply and into the plies below the face ply unless the thickness of the plywood exceeds the value shown in Table 30C by an amount equal to at least the depth of penetration of the grooves into the plies below the face ply."

Change title to read "MINIMUM THICKNESS OF PLYWOOD INTERIOR FINISH".

"Hard-pressed fibreboard shall conform to CGSB ll-GP-3b(1972), 'Hardboard'."

" . . . except that in walls where blocking is prm"ided at mid-wall height, particleboard shall have a thickness of not less than I~ in. on supports not more than 24 in. o.c."

In the second line change "CGSB 19-GP-3a(1968)" to read "CGSB 19-GP-3b( 1972)".

In the second and third lines delete "Elastomeric".

Change last line to read "CGSB I1-GP-3b(1972), 'Hardboard'." In the last line change "FS-L-F -00450( 1959)" to read "FS-L-F-00450A( 1970)".

Delete the first sentence and substitute:

"Ceramic tile installed with an adhesive shall be applied Oler a smooth base of concrete or over a panel-type underlay as described in 318, except that particleboard shall be limited to Type 1 particle-board in CSA 0188-1968, 'Mat-Formed Wood Particleparticle-board'." Change heading to read "PLUMBING FACILITIES".

Delete and renumber Articles 32B(2) and 32B(3) as Articles 32B(1) and 32B(2), respectively.

In the third line change "CSA B51-1969" to read "CSA B51-1972".

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Page 118 121 122 126 128 129 130 Code Requirement 34(:(2) 34D(6) 34H(2) 37B 39A(6) 39C( I) 40C Revision

"Except for heating supply ducts serving not more than one dwelling unit and encased in concrete slabs-on-ground. heating supply ducts shall be noncombustible or shall be Class

t

ducts installed in confonnance with Part 6 of the National Building Code of Canada 1970. Combustible ducts in concrete slabs-on-ground that are connected to a furnace suppl)' plenum shall be located not closer than 2 ft from that plenum. and not less than 2 ft from its connection to a riser or register. Ducts in or beneath concrete slabs-on-ground shall be water tight. corrosion resistant, deca) resistant and mildew resistant."

At the beginning ofthe article delete the words: "Except for pipeless and floor furnaces".

"except that combustible insulation may be used. provided such insulation conforms to the requirements in Part 6 of the National Building Code of Canada 1970 for combustible pipe insulation." Delete and substitue:

"( I) Except as provided in (2) and (3). at least one elevator shall be provided in every building which has dwelling units above the third storey. and in buildings in which the vertical distance from the ground level at the main entrance door and the floor of the uppermost dwelling unit exceeds 24 ft. Where there are exterior stairs or a platform at the main entrance. such vertical distance shall be measured to the bottom of the stair or platform.

(2) At least two elevators shall be provided in buildings which have more than three dwelling units on the seventh or higher storey, or where the vertical distance between the main entrance door and the floor of the uppermost dwelling unit exceeds 50 f1. Where there are exterior stairs or a platform at the main entrance. such vertical distance shall be measured to the bottom of the stair or platform. (3) At least one elevator shall be provided in every building which is specifically designed to accommodate elderly per'lons above the second storey, or where the vertical distance from the ground level at the main entrance door to the uppermost floor level designed to accommodate elderly persons exceeds 15 ft. Where there are exter-ior stairs or a platform at the main entrance. such vertical distance shall be measured to the bottom of the stair or platform."

In the second line add "appropriate" before "requirements". Delete and substitute:

"Every entrance to a building except a patio door shall be served by a walkway or a system of walkways. except that not more than two walkways need be provided to a building. A combined walkway-driveway may be used where the building exit serves not more than two dwelling units."

Add new Article 4OC(3) as follows:

"In areas where seeding or sodding is specified. the requirement in 40C(2) shall also apply."

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•

"age Code Requirement

131 40E(2)

134 Table A-I

135

137 Table A-2

Revision

Change the first sentence to read:

"Plant material shall conform to the Guide Specifications for Nursery Stock of the Canadian Nursery Trades Association."

In Column 5 opposite Item ;\10. 14 change "I hr" to read "JIll hr". In Column 5 opposite Item ;\10.22 change "1 hr" to read "3 hr". In Column 3 opposite Item No.1 in the second line add the dimen-sion "7/16 in." before tbe word "fibrehoard".