19'70

(1)

NATIONAL RESEARCH COUNCIL OF CANADA

ASSOCIATE COMMITTEE ON THE

~

NATIONAL BUILDING CODE

ERRATA AND REVISIONS

to

the

NATIONAL BUILDING CODE OF CANADA

19'70

CHANGE SERIES

No.

2

(Change Series No. 2 has incorporated the Revisions from Change Series No. 1: they are distinguished by asterisks.)

Ottawa

1 July 1972

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(2)

ERRATA

to the

National Building Code of Canada 1970

Errata issued 1 July 1972

by the

Associate Committee 011

tlle National Building Code

National Research Council of Canada

The Associate Con~mittee on the National Building Code records the following corrections to the 1970 edition of the National Building Code of Canada.

ERRATA

Page Code Requirement Correction

41 3.1.4.5.(4)(d) Change to read "conform to ULI No. 181 (1967), 'Air Ducts', for Class I ducts."

In the second line add the words

". . .

as described in Subsection3.1.13." to theend oftheline.

92 3.2.3.13.(11) In the last line change "1970" to read "1963". 93 3.2.3.16.(1)(b) In the first line italicize the word "walkway". 98 3.2.5.6. In the last line change "1970" to read "1963". 104 3.3.1.1.(1) In the last line change "1970" to read "1963". 105 3.3.1.6.(3) At the end of the sentence add

". . .

and 3.4.7.2." 115 3.3.7.3. In the third line change " 1970" to read " 1963". 119 3.4.3.1.(6) In the first line change "dooway" to read "doorway". 122 Table In the first column change heading to read "Grade of

3.4.5.A. Fire Separation Required for Floor Assembly". In the second column change heading to read "Mini- mum Fire-Resistance Rating for Fire Separation of Exit".

130 3.5.2.1 .(I) In the first line delete the word "heating".

NOTE: Change Series No. 2 does not include errata from Change Series No. 1 which have been incorporated into the second and subsequent printings of the National Building Code (with the exception of those affecting Supplement No. 4.)

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130 In the second line change "kcatirtg appliance" to read

"applicurce".

Delete marginal note "Creep, shrinkage and other effects".

4.1.2.2.(2) In the fourth line delete the word "strength".

4.1.6.3.(b) In the second line change the word "zero" to read "full".

6.2.3.1 .(3)(b) Change "B149.1-1970" to read "B149.1-1971" 6.2.8.3(2)(b) In seventh line change "Silicone" to read "Silicon" 6.2.8.9.(3)(a) Change "attic" to read "attic or roof space". 7.2.4.4. (old no. 7.2.4.3.) Change marginal note to read "Double Y fitting". 7.5.1.4. Delete marginal note.

In the fifth and sixth lines change "requerements" to read "requirements".

Table Add at the end of Note (2):

9.10.15.A.

". . .

between two buildings on the same property measured at right angles to the exposing buildingface." In the second line change "CSA B149.1-1970" to read "CSA B149.1-1971".

In the eighth line change "CSA B149. 1-1970" to read "CSA B149. 1-1971".

Changf, "CSA 1-1971

.

B149. 1-1970" to read "CSA In the first line change "dwelling unit" to read "a

dwelling unit".

Table I-A Item 18

In the third column add the word "least" to the end of the first line.

Table I-B In the heading to the fifth column add notation "(2)" after "Fire Resistance Rating".

Table 11-A Opposite the entry for Pacific Coast Hemlock, Con- struction Grade, 2x10, Gypsum Board o r Plastered Ceiling, 24 in. Spacing, change "32 1" to read "23 1".

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(4)

REVISIONS

National Building Code of Canada 1970

The Associate Coniniittce on thc National 13uilding Codc reconimcnds that the follouing revisions be inserted in all copies of the 1970 edition of thc National R~lilding Codc of Canada.

Page Code Requirement Revision

37 Table 3.1.3.A.

add new definition as follows:

"Fi1.c stop flop - means a device intended for ~ l s e in horirontal .frrc. sc~pnr.atiorrs incorporating protect ive ceiling membranes, which operates to close off a duct opening through the membrane in the event of a fire."

Delete and substitute:

"An arena-type birildirlg intended for occasional use for trade shows and siniilar exhibition purposes shall be classified as G r o u p A, Division 3 occrcpaticy and when the birillirrg area of such brri/Oirlg exceeds 15,000 sq ft the birildirlg shall be sprinklercd."

Change to read:

"(b) have, unless otherwise approlvd, a combined area not exceeding 3000 sq ft (279 mz)."

At the end of Note (2) add: "(See Sentence 3.3.7.7.(1 I).)" Delete and substitute:

"Every birilding o r part of a building required to be of

rloncotnbustible constrircrion, shall be constructed of

noncombustible material except as provided in Sentences (2), (3) and (4)."

Delete Subclause (iii) and substitute: "insulation and jackets o n wiring,"

Delete Clauses (b). (c) and (d) and substitute: "(b) roof covering which has a n A, B, or C classification determined in conformance with Subsection 3.1.13.; "(c)adhesives, vapour barriersandsheathingpapers, and "(d) thermal and sound insulation having a f i m e -

spread rating of not more than 25 on any exposed surface o r any surface that would be exposed by cutting through the material in any direction except that:

( i ) where the insulation is placed between two layers of tioncombusriblc material having a meltingpoint above 1 200F0(649"C) without an interveningair space, theflame-spreadrating of

the insulation shall not exceed 75 on any exposed surface or any surface that would be exposed by cutting through the material in any direction,

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Page Code Requirement Revision

(ii) no fl(~mc~-sprecrd rcltiri~ shall be required for the surface of thermal insulation installed im- rnedintely beneath the roofcovering when the sllrface of the insulation has been treated and irlstalled so as to reduce the tendency of the bitumen to soak into or through cracks or gaps in the insulation,"

(iii) insulation installed on top of roofing shall have a flutne spi.ead rafitig of not more than 75 on any exposed surface or on any surface that would be exposed by cutting through the material.

Add new Sentence (5) as follows:

"Combusribie pipes, electrical outlet boxes, conduit or other similar service equipment shall be constructed from materials having aflumc-spreadrating of not more than 25."

In the eighth and ninth lines change "ASTM E l 19-69" to read "ASTM E l 19-71", and add to title "Including Tentative Revision".

In the twelfth and thirteenth lines change "ULC 263 (1959)" to read "ULC 263 (1971)" and "ULI 263 (1959)" to read "ULI 263 (1971)".

"Where a ceiling construction has a suspended mem- braneceiling with lay-in panels or tiles which contribute to the required fire-resistance rating of the assembly, hold down clips or other approved means shall be pro- vided to preveft the lifting of such panels or tiles in the event of a fire.

In the second line delete "fire damper" and substitute

"fire stop flap".

In the first and third lines delete "fire dampers" and substitute "fire stop flaps".

In the second line add a comma after "clos~rres" and insert "shafts".

In the first line delete the words, "in Sentence (2) and". Delete and renumber Sentences (3) to (6) accordingly. Add the following to the list of standards:

"ULC 555 (1970)' 'Standard for Fire Dampers'

".

In the third line change "NFPA 80 (1968)" to read "NFPA 80 (1 970)".

Add the following new Sentences (5) to (9):

"(5) Except as provided in Sentence (9), a duct piercing a fire separation required to have a fire-resistance

rating shall be equipped with a f?~e damper to act as a closlrre at the fire separation.

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(6)

"(6) A fire damper required in Sentence (5) or other fire damper used as a closure in a fire separation shall have a fi;e-prorrction rating conforming to Sen- tence (4).

"(7) A fire damper referred to in Sentence (6) used in a fire separation required to have a fire-resisrarrce rating of not more than 2 hr but which is not a firewall, shall be constructed and rated in confor- rnance with ULC 555 (1970), 'Standard for Fire Dampers'."

"(8) A fire damper referred to in Sentence (6) used in a fire separation required to have a fire-resistance rating of more than 2 hr, or used in afirewall shall be rated in conformance with one of the test methods in Sentence (I) for door assemblies." "(9) Fire dampers need not be provided in noncombus-

tible branch ducts that have a melting point above 1200°F (649°C) and penetrate a required fire separation provided such ducts :

(a) serve only air-conditioning units discharging air at not more than 4 ft (1.2 m) above the floor provided such ducts :

(i) do not pierce a floor at more than one place, and

(ii) have a cross sectional area of not more than 20 sq in (1 29 sq cm) or

(b) are connected to exhaust duct risers in which the air flow is upward and such ducts are carried up inside the riser at least 22 in. (0.56 m)."

"A door having at least a 20 minute fire-protecriori ratirlg, or a 1

%

in. thick solid core wood door, mounted in a frame that has been tested and rated, or mounted in a wood frame of at least 2 in. nominal thickness may be used as a closure in

(a) afire separation required to have not more than a 1 hr fire-resistance rating where such closure is located between a public corridor and a room or suite of rooms, or

(b) a fire separation required to have a

%

hr fire- resistance rating in buildings not exceeding 3 storeys in building height."

Add new Sentence (5) as follows, and renumber existing Sentences (5) to (8) accordingly.

"The requirements for noncombustible sills in NFPA 80-1970, 'Standard for Fire Doors', shall not apply to doors described in Sentence (4)."

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(7)

47 3.1.7.3.(1) In the last line delete the words "and upproveri".

47 3.1.7.4.(3) In the fourth line change "shall" to read "may". Jn the sixth line change "NFPA 101 (1967)" to read "NFPA 101 (1970)".

In first line add "and electric conduit" after "outlet box" and renumber requirement as 3.1.7.7.(1)". Add new Sentence ( 2 ) : "Plastic drain, waste and vent pipe shall not be used in systems that pass through or are located in a requiredfire separafion."

In the first line delete the word "combustible". Delete and substitute:

"asbestos cement board, gypsum board or other non-

combustible material having a melting point above 1200°F (649"C), such as sheet steel".

In the first line change "Sentences ( 2 ) and (3)" to read "Sentences ( 2 ) to (5)".

Change the fourth line to read "on the basis of the average of at least three tests conducted in accordance with the ap-"

In the sixth line change "ASTM E84-68" to read "ASTM E84-70".

In the ninth line change "ULI 723 (1965)" to read "ULI 723 ( 1 97 1)".

Add to the end of the sentence :

"but modified in conformance with Sentence (4)." Add new Sentence ( 2 ) as follows and renumber existing Sentences ( 2 ) and ( 3 ) to read Sentences ( 3 ) and ( 4 ) : "The flame-spread rating and smoke developed classi- fication of a material or assembly of material for floor application shall be determined by the authority having

jurisdiction on the basis of results of tests conducted in accordance with the provisions of CSA B54.9-1972, "Standard Method of Test for Surface Burning Char- acteristics of Flooring and Floor Covering Materials".

Add new Sentence ( 5 ) as follows :

"Where the flame spread classification determined in accordance with the provision of Sentence ( 1 ) is be- tween 55 and 78 the flame-spread rating shall be the greater of:

(a) the value determined in accordance with the pro- visions of Sentence ( 1 ) ; or

(b) the greatest value that can be determined by the formula 254 applied to observations of the progress of the flame front during the tests, where

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(8)

53 Table 3.1.14.A.

d -- any distance offlanie travel from the point of origin, in feet, that is greater than 10, and t - the time in minutes for the flame to travel distance d."

Delete (i) and (ii) and add after "exceeding", the number "200".

In the first line add "and translucent" after the word "grid".

In the second IEe change "NFPA 13-1969" to read "NFPA 13-1971 .

In the third line add "and 4322" after "4321".

In the seventh line change "ASTM E108-58" to read "ASTM E108-70".

In the eighth line after "790" delete "C".

In the tenth line change "ULI 790(1969)" to read "ULI 790(1970)".

In the twelfth line, change "NFPA 256-1964" to read "NFPA 256-1 970".

Add to the beginning of (b) :

b L ~ n l e ~ ~ otherwise approved,"

After the entry for "storage garage" change "200" to read "500" in the third column.

Delete Item 12 of Assembly Uses Delete Item 4 ofInstitutiona1 Uses

Delete Item 2 of Business and Personal Service Uses but retain "Offices-100"

Delete Item 5 of Industrial Uses

In the second and third lines delete the following: "not exceeding 2 storeys in building height". Delete the word "Sprinklered" in the heading. Delete and reletter Clauses (d) to (g) accordingly. In the third line delete "but not less than 1 hr". Delete and substitute :

"crawl spaces in a buildir~g of combustible construction, and basements and cellars in every building shall be subdivided by Q hr fire separations into areas not exceeding 5000 sq ft (465 m2) or they shall be

sprinklered;"

"roof assemblies shall have a 1 hr fire resistance rating, except that in buildings of one storey in building height this requirement is waived and".

"crawl spaces in a building of combustible construction, and basements and cellars in every building shall be subdivided by 3/j hr fire separations into areas not exceeding 5000 sq ft (465 m2) or they shall be

sprinklered ;"

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(9)

77 3.2.2.4 1 .(2)(a) Delete and substitute:

"crawl spaces in a hrriiriitrg of conthustihie cottstructiorr, and basements and cellars in every hrrildirtg shall be subdivided by hr fire sc>par.ariotts into areas not exceeding 5000 sq ft (465 nt2) or they shall be

spririkle~etl;"

81 3.2.2.46.(2)(~) Change first line to read:

"floor assemblies imniediately above crawl spaces shall have, if of conthlrstible constrlrctiort a hr"

86 3.2.3.1 .(I) Delete the note following 3.2.3.1.(1) and substitute with:

"(The requirements of this Article are aimed at com- bating fire spread by thermal radiation provided adequate fire fighting is envisaged. It has been found that periods of 10 to 30 minutes usually elapse between the outbreak of flaming contbustion in a building and the attainment of high radiation levels. During this period the specified spatial separations rill prove adequate to inhibit ignition of theexposed building facade or interior of an adjacent building by radiation. Subsequently, however, reduction of the fire intensity by firefighting and the protective wetting of the exposed building facade will often be necessary as supplementary mea- sures to inhibit fire spread)".

88 Table 3.2.3.A. 89 Table

3.2.3.R.

Add new Sentence (4) :

"In respect to the buildirlg under consideration where firefighting facilities and protective wetting facilities are not available within ten minutes of the alarm being received, the limiting distance required by Article 3.2.3.1. shall be doubled."

Delete the words "comrrtori ~tjall or".

In the first column change "20,000" to read "20,000 or greater".

"Manually operated, non-electric alarm systems em- ploying approved mechanical gongs may be used in

buildings not more than 2 storeys in building height where not more than two manual fire alarm stations would be required in the building provided each gong is audible in every location in the building."

In the fifth, sixth and seventh lines delete the words "an automatic sprinkler system incorporating a water flow switch connected to the alarm system is installed throught the building." and

substitute:

"the building is sprinklered and a water flow switch in- corporated in the sprinkler system is connected to the fire alarm system."

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Page Code Requirement *96 3 . 2 . 4 . 3 .

Revision

In the thtrd line dclclc all uording after "Subsection 3.2.6." and replace ~ i t h the follo\\ing:

"there +all be direct connection to the fire department headquarters by \\ay of the municipal fire alarni system or an independently owned system or \ia a central station or proprietary control centre uith direct com- niunication with the fire department".

delete.

"Every hrrilding shall be located so that it has a c e s to a street, either directly, or by a yard conforming to Sentence 3.2.2.4.(1)."

to be deleted in its entirety and replaced by the following:

"every builc/ilig of Group A, D. E or F orcrrpancy that is niore than

(i) 120 ft (36.6m) in height nieasured between the floor level of the top storey and grade, or (ii) 60 ft (18.3111) in height measured between the

floor level of the top storey and grade, in which the total number of persons above the first storejT served by any exit stairway exceeds 300 persons per unit of exit width ;"

to be deleted in its entirety and replaced by the following:

"every hrtik/ing of Group B o r C occupancy that is more than 60 ft (18.3m) in height measured between the floor level of the tor, storey and made: and" N.B. The Note in small type betwveen clauses (a) and (b) remains unchanged.

In line 1 " S u b s ~ ~ t i o n 3.2.4." should read "Subsections 3.2.4. and 3.2.6.

.

after "department" delete the period and add "as provided in Article 3.2.4.3."

In line 2 delete " 1 2 storeys in building height or". delete the words "between designated points", and substitute, "at approsedlocations".

delete all words after "facility", and replace with: "which are designed and located so as to be heard in a1 l areas of the blriltlir~g".

delete in its entirety and replace with, "means to activate the fire alarni systems; and".

*Previously issued a s Change Series No. 1, 1 July, 1971.

NOTE: Further revisions t o 3.2.6 incorporating requirements f o r control ol' s m o k e rno\.ernent will b e p u b - lished in a supplementary revision t o be issued in 1973.

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(11)

*99 3.2.6.5.(2)(e) add new Clause as follo\vs :

"(e) nieans to automatically transmit to the fire de- partrnent, as provided in Article 3.2.4.3., any alarm caused by the operation of:

(i) a fire alarm box located on any floor (ii) an ailtonlatic sprinkler system, or

(iii) automatic fire detectors actuated by heat, smoke or other products of conlbustion". In line 2 "(2) to (4)" should read "(2),(4) and (5)". Tn line 5 "3.2.6.7." should read "3.2.6.6.".

In lines 1 and 2 delete "1 2 storeys in buildi~~g height, or". Delete and substi!ute:

*lo0 3.2.6.7.(1) *lo2 3.2.6.9.(1)

*

102 3.2.6.9.(2)(b) 103 Table 3.2.6.D

Table 3.2.6.D.

Forming Part of Article 3.2.6.10,

Location

Exit stairways, vestibules to

1

exit stain and exit lobbies

1

25 25 25

1

50

1

50

1

50

1

Maximum Maximum

Flame-Spread Raring Smoke Developed Classification

Corridors providing access

to exit except within suites

1

(I) (1) 300 100

1

50

1

500

1

Elevator cars and vestibules 25 25 300

1

100

1

100

(

300

(

Floor Surface Wall

'

Ceiling ' Floor

(

Wall

Surface Surface Surface Surface

Service spaces and service

1

roonls

1

25 25 ' 25

'

I 50 5 0 5 0 1 Ceiling

Surface

Note to Table 3.2.6.D. :

(1) See Section 3.3 and Subsections 3.1.4. and 3.1.11. for jarne-spread rating requirenlents in these locations.

(2) See ACNBC paper entitled "Application o f NBC Flame and Smoke Requirements to Flooring Mat- erials," available from the Secretary, Associate Committee on the National Building Code, National Research Council. Ottawa.

Other rooms or spaces

Add the following:

"Such fire separarions need not be supported as required in Sentence 3.1.6.2.(1)."

104 3.3.1.1.(3) Delete.

I

(1)

1

(1) (2)

104 3.3.1.1.(4) In the fourth and fifth lines, delete "NFPA 96-1969, 'Installation of Equipment for the Removal of Smoke and Grease-Laden Vapors from Commercial Cooking ;Equipment"' and substitute, "NFPA 96-1971, Standard for the Installation of Equipment for the Removal of Smoke and Grease-Laden Vapors from Commercial C o o k i ~ ~ g Equipment' ".

'Previously issued as Change Series N o . I, I July, 1971.

300 50 (2)

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(12)

Add to the beginning of the sentcnce: "12xccpt as provided in Scntcnce (2),"

104 3.3.1.3.(2) Renulnbcr as sentence (3) and cliangc third arid fourth lines to read :

"at least equal to 1 hr cxccpt that a % hr fir.(-sc7paratioi1 is permitted where the fire rcsistailcc r'atirlg of the floor assenlbly is not required to exceed % hr".

"In builditrgs of rrsi~feirtial occupatrcj* and not inore than 3 storc.jJs in b~iilr/iirg heigfrt a doorway from a

dlvelliirg urrit is permitted to open directly into an exit stairway or into a public corritfor served by a single exit stairway pro.:ided each dwt~llitlg rrtrit has a second and separate tnc.ans of egrc.ss."

Add new Sentence (3) and renumber existing Sentence as Sentence (4).

'zmoke vent openings into smoke shafts described in Subsection 3.2.6. located less than 42 in. above the floor and which are of sufficient size to constitute a hazard shall be protected with a guard at least 42 in. in height."

Add to the end of the sentence:

"and when constructed of glass shall be constructed of wired glass or safety glass confornling to Part 9 of this Bylaw."

Add new Sentence (3) as follous:

"(3) Glass in doors and side lights that could be mis- taken for doors within or at the entrances to dwelling

units shall conform to the requirements in Part 9 of this Bylaw."

In the second line delete "1 hr"

Add new Sentence (2) as follows and renumber existing Sentences (2) to (4) accordingly.

"(2) Fire separations between zones shall have a fire-

resistance rati~rg of at least 1 hr except that a 1/4 hr

fire separatiotr is permitted where the fire-resistance

rating of the floor assembly is not required to exceed

3/4 hr."

Change the fourth and fifth line to read

"the remainder of the building by a I hr fire separation

except that a 1/4 hr fire separation is permitted where the fire-resistance rating of the floor assembly is not required t2,exceed

3/J

hr, o r such rooms shall be

sprinklered.

In the second line delete the words: "unless otherwise approved."

In the third and fourth lines change "Group A, B, C

or E occupancy" to read "Group A, B or C occupancy".

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(13)

In the second line change "ma1" to "shall". In tlie third linc delete "slitie escape".

I11 the tuclfth line delete "or".

In thc last linc dclete the period and add ", or". At the end of r'rrticlc add "inclined moving ualk- ways that move only in tlie direction of c..uit travel." Delete and substitute:

"A fire escape shall not be erected on an existing

hrrildir~g unless i t can be demonstrated to the satis- faction of the nlrthoritj1 hnl'ing j~rriscliction that it is

impractical to provide one or rnore of the csit facilities

in Article 3.4.1.3."

Add to the end of the Sentence

"but may be provided as an additional egress facility where unusual hazards may exist."

In the seventh line place a period after "separations" and delete remainder of sentence.

In. the first line change "enclosing" to read "separ- at~ng".

Delete the word "stairway",

Add new Sentences (6), (7) and (8) as follows: "(6) Every glass or transparent exit door accessible to the public shall be designed and constructed so that the existence and position of such door is readily apparent by attaching thereto non-transparent hard- ware, bars or other permanent fixtures and when constructed of glass shall be constructed of wired glass or safety glass conforming to Part 9 of this Bylaw."

"(7) Transparent panels, sidelights or windows used in exits which because of their physical configuration or design could be ~iiistaken for doors shall be made inaccessible to the occupants by barriers or railings." "(8) Glass in doors and sidelights that could be mis- taken for doors within or at the entrances to dn~elling

units shall conform to the requirements of Part 9 of this Bylaw."

In the first line change "3 storeys" to read "4 storeys". Add new Sentence (6) as follows:

"Windows in exit stairways that extend to less than 42 in. above the landing shall be protected by a barrier or railing located approximately 42 in. above such landing."

In second line add "unless otherwise approved". after the word "mullion".

"Unless otherwise approved, the flight of stair: leading to the ground at the foot of a fire escape shall be fixed in position. Where such flight of stairs is not fixed in position, it shall be held in the 'up' position without a latch or locking device, and shall be fitted with an

approved counterbalancing device that will permit i t to be easily and quickly brought into position for use."

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(14)

Page Code Requiren~ent 129 3.5.1.5. 156 Table 4.1.8.A. 164 4.2.2.1 .(I) 164 4.2.2.1 ,(l)(a) Revision

Dcletc entire article and substitute:

"Where d ~ l c t s pass through a Jirc scporotion, such ducts shall be equipped with fire dampers to act as

closlrres in conformance with Article 3.1.7.1 ."

Add new Sentence (4) a s follo\\s:

"A fire scporotion around a sc.rricc roorrr need not be supported in conformance u i t h Sentence 3.1.6.2.(1)." Add new Article 3.5.2.8. a s follows:

"Every transformer vault shall be separated from all other occlrponcics by at least a 2 lir f i e separation

of notlconthwtihlc corlstrrrctior~."

In the second line change "Part 6" to read "Section 6.6".

Delete.

Add new Article 3.6.4.4.: "Glass, other than safety glass, shall not be used for a shower o r bathtub eq- closure."

Change "CSA Standard B44-1966" to read "CSA Standard 844-1 97 1

".

In the second and third lines change "CSA 080-C- 1965" to read "CSA 0 8 0 . 1-1 970".

In the first line change "CSA 080-C2-1966" t o read "CSA 0 8 0 . 2-1 970".

In the first line change "CSA 080-C3-1965" t o read "CSA 0 8 0 . 3-1970".

In the second line change "CSA 080-C12-1965" t o read "CSA 0 8 0 . 12-1970" and title t o read "Preserva- tive Treatment of Tiniber Foundation Piles by Pres- sure Processes".

In the fifth and sixth lines delete "ASTM A245-64 Flat Rolled Carbon Steel Sheets of Structural Quality" and substitute with "ASTM A570-70 Hot Rolled Carbon Steel Sheets and Strip, Structural Quality and ASTM A61 1-70 Steel, Cold-Rolled Sheet, Carbon Structural". In the seventh line, delete "ASTM A303-64 Hot-Rolled Carbon Steel Strip of Structural Quality" and substitute with "ASTM A570-70 Hot-Rolled Carbon Steel Sheets and Strip, Structural Quality". I n the eighth line change "ASTM A283-67" t o read "ASTM A283-70a". In the twelfth and thirteenth lines delete "ASTM A415-64 Hot-Rolled Carbon Steel Sheets Comn~ercial Quality" and substitute with "ASTM A569-66T Hot- Rolled Carbon Steel Sheets and Strip, Commercial Quality".

In the third and fourth lines change "ASTM D1143- 61T, Load Settlement Relationship for Individual Piles Under Vertical Axial Load" t o read "ASTM D l 143-69 Load Settlement Relationship for Individual Vertical Piles Under Static Asia1 Load".

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Page Code Requirement *207 5.1.1.2., 208 List of Standards 208 List of Standards 209 List of Standards 209 List of Standards 209 List of Standards 209 List of Standards 210 List of Standards 210 List of Standards 210 List of Standards 210 List of Standards 210 List of Standards 210 List of Standards 210 Listofstandards 210 List of Standards 210 List of Standards 210 List of Standards 210 List of Standards 21 1 List of Standards 21 1 List of Standards

*Previously issued as Change Se

Revision

In line 2 delete and subctiti~te: "Tables 9.3.3.A or 9.3.3.R as appropriate for the grading rilles being applied."

Change "A5-1961" to read "A5-1971". Change "A 123.3-1965" to read "A1 23.3-1971". In A123.8-1953 change "Reaffirnled 1964" to "Re- affirmed 1970".

In A1 23.9-1 953 change "Reaffirmed 1964" to "Re- afirrned 1970".

In A247.1-1969 add "Roof" between "Fibreboard" and "Insulation". Change "B70-1963" to read "B70-1971". Change "B137-1963" to read "B137. 1-1970". Change "080-1966" to read "080-1970". Change "080. Cl-1965" to read "080. 1-1970". Change "080. C2-1966" to read "080. 2-1970". Change "080. C3-1965" to read "080. 3-1970". Change "080. C12-1965" "Creosoted Wood Founda- tion Piles" to read "080.12-1 970, 'Preservative Treat- ment of Timber Foundation Piles by Pressure Pro- cesses'

".

Add the following standard: "0141-1970, 'Softwood Lumber'

".

Change "9-GP-2 16 Feb. 1951, Paper: Building, Sheathing, Water Repellent, (Breather Type) (Amend- ed: 27 Feb. 52; 26 Jun. 52; 16 Dec. 64)" to read "9-GP-2a April 1971, Paper: Building, Cellulosic Fibre".

Change "12-GP-la 14 Mar. 1958, Glass: Safety" to read "12-GP-lb Aug. 1971, Glass: Safety, for Building Construction".

Change "12-GP-2 19 May 1955, Glass: Flat, Clear Sheet" to read "12-GP-2a Sept. 1970, Glass, Sheet: Flat, Clear".

Change "12-GP-3a 4 Mar. 1966, Glass: Flat, Polished Plate or Float" to read "12-GP-3b Sept. 1970, Glass, Plate: Flat, Polished Plate or Float".

Change " 1 9-GP-6 12 May 1961 (Amended : 6 Jul. 62)" to read "19-GP-6a Jun. 1970 (Amended: Oct. 1970)" and delete the words "Gun Grade" in the title. Change "19-GP-9a Sept. 1969" to read "1 9-GP-9b Apr. 1971" and delete the word "Elastomeric" in the title.

ries No. 1, 1 July, 1971.

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Page 21 1 Code Requirement List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards Revision

Change "19-CiP-15 1969" to read " 19-CiP-15a Apr. 1971'' and dcletc the nard "Elastomeric" in the title. Change "34-GP-4a 11 Dcc. 1959, Shingles: Asbestos Ccnient, Siding (A~ncnded: 7 Oct. 66)" to read "34-GP-4b Jan. 1970, Sid~ng: Asbest04 Cerncnt, Shingles and Clapboards (Amended: Jan. 1971)". Change "34-GP-5b 4 Mar. 1960 (Amended: 23 June 61)" to read "34-GP-5c Jan. 1970 (Amended: Jan. 1971)"

Change "34-GP-16a l l Dec. 1959 (Amended : 23 Jun. 61)" to read "34-GP-16b Jan. 1970 (Amended: Jan. 1971)"

Change "34-GP-17b 9 Oct. 1959 (Aniended: 23 Jun. 61)" to read "34-GP-17c Jan. 1970".

Change "34-G P-22 1 1 Nov. 1966 (Amended : 30 May 69)" to read "34-GP-22a Jan. 1970 (Amended: Jan. 1971)".

Change "37-GP-2a 17 Sept. 1965" to rend "37-GP-2c Oct. 1971" and delete "(Amended 7 July 67)". In title after "Asphalt" delete "Compounds".

Change "37-GP-4a 27 Jan. 1961, Cement: Lap, Asphalt Roofing" to read "37-GP-4b Apr. 1971, 'Cement: Lap, Asphalt Cutback, F~brated, for Asphalt Roofing".

Change "37-GP-5b 29 Dec. 1967" to read "37-GP-5c Dec. 1971".

Change "37-GP-6b 29 Dec. 1967" to read "37-GP-6c Nov. 1971".

Change "37-GP-8b 29 Dec. 1967" to read "37-GP-8c Dec. 1971" and title to read "Asphalt, Cutback: Filled, for roof coating".

Change "37-GP-9b 22 Dec. 1967" to read "37-GP-9c Oct. 1971".

Change "37-GP-12a 15 Mar. 1968" to read "37-GP- 12b Dec. 1971" and title to read "Application of Un- filled Cutback Asphalt for Dampproofing".

Change "37-GP-I 6b 4 Jan. 1968" to read "37-GP-16c Dec. 1971".

Change "37-GP-17a 7 July 1967" to read "37-GP-17b Dec. 1971".

Change "37-GP-18b June 1969" to read "37-GP-18c Dec. 1971".

Change "37-GP-21b June 1969" to read "37-GP-21c Dec. 1971

".

Change "37-GP-22a 29 Dec. 1967" to read "37-GP- 22b Dec. 197 1

".

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Page Code Requirement 21 2 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 212 List of Standards 213 List of Standards 213 List of Standards Revision

Change "41-GP-16 31 Jul. 1964" to read "41-GP-16a May 1971" and revise the title to read: "Polyurethane: Rigid, Cellular, for Thermal Insulatio~l and other Applications".

Change "56-GP-la 23 Nov. 1962" to read "56-GP-lb Dec. 1970".

Change "56-GP-10 20 Jan. 1961" to read "56-GP-1Oa Dec. 1970".

In 63-GP-4 add "(Amended: Oct. 1969)".

Change "63-GP-5 21 Feb. 1964 (Amended: 10 Jul. 1964)" to read "63-GP-5a Jan. 1970 (Amended: May 1970)".

Change "70-GP- 1 8 Jul. 1960 (Amended : 1 Jun. 1962)" to read "70-GP-la Nov. 1970".

Change "77-GP-1 19 Jan. 1962" to read "77-GP-la Nov. 1970" and change the title to read "Caulking Compound, Cementitious Type, Cold Applied, for Pipe Joints".

Change "(Amended : 15 Apr. 66)" to read" (Amended :

Apr. 1971)" after the title for 82-GP-1.

Change "(Amended : 15 Apr. 66)" to read "Amended :

Sept. 1969)" after the title for 82-GP-2. Delete 93-GP-1.

Delete 93-GP-3.

Add new CGSB standard "93-GP-4 May 1971, 'Siding: Soffits and Fascia, Steel, Zinc Coated (Gal- vanized), Prefinished, Standard Duty, for Residential Buildings'

".

Change "A1 67-63'' to read "A 167-70".

Delete "A245-64 Flat-Rolled Carbon Steel Sheets of Structural Quality" and substitute with "A570-70 Hot-Rolled Carbon Steel Sheets and Strip, Structural Quality and A61 1-70 Steel, Cold-Rolled Sheet, Carbon Structural".

Change "A283-67" to read "A283-70a"

Delete "A303-64 Hot-Rolled Carbon Steel Strip of Structural Quality" and substitute with "A570-70 Hot- Rolled Carbon Steel Sheets and Strip, Structural Quality".

Deleteb'A41 5-64 Hot-Rolled Carbon Steel Sheets, Com- mercial Quality" and substitute with "A569-b6T Hot- Rolled Carbon Steel Sheets and Strip, Commercial Quality".

Change "A525-67" to read "A525-71" and change title to read "General requirements, Steel Sheet, Zinc- Coated (Galvanized) by the Hot-Dip Process".

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Page 213 213 213 Code Requirement List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards List of Standards Table 6.1.4.A Revision

Change "A568-66T" to read "A568-71". Change "B209-69" to read "B209-71".

Change "C14-68" to read "C1.1-70". Add to titlc "Including Tentative Re\.isionW.

Change "C2 12-60" to read "C2 12-60 (1 970)". Change "C494-68" to read "C494-7 1

".

Change "E84-68" to read "E84-70".

Change "E108-58 (1965)" to read "E108-58 (1970)". Change "El 19-69" to read "El 19-71". Add to title "Including Tentative Revision".

Change "B16.3-1963" to read "B16.3-1971". Change "B16.4-1963" to read "B16.4-1971". Change "B16.12-1965" toread "B16.12-1971". Change "B16.15-1964" to read "B16.15-1971" and title to,fead "Cast Bronze Threaded Fittings, 150 and 3001b.

.

Change "B16.24-1962" to read "B16.24-1971". Change "221.22-1964" to read "221.22-1 97 1" Change "ULC-263 May 1959" to read "ULC-263 1971".

Change "ULC-790C" to read "ULC 790" Change "ULI-127 1960" to read "ULI-127 1970". Change "ULI-263 1959" to read "ULI-263 1971". Change "ULI-723 1965" to read "ULI-723 1971". Add new standard "ULC-555 1970, 'Fire Dampers'

".

In the second column change "ASTM A525-67" to read "ASTM A525-71".

In the third column, change "ASTM A568-66T" to read "ASTM A568-7 1".

In the fourth column, change "ASTM A167-63" to read "ASTM A167-70".

In the fifth column change "ASTM B209-69" to read "ASTM B209-71".

Revise Note to read:

"(The procedures described in the ASHRAE Guide and Data Books, the ASHRAE Handbook of Funda- mentals, the HRA Digest and the IRR Manuals may be considered as good engineering practice.)"

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Page Code Requirement Revision

220 6.2.3.1 .(3)(a) Delete and substitute:

"CSA B139-1971, 'Installation Code for Oil Burning Equipn~ent'

".

In the second line after "Equipn~ent" add "and Supplement No. 1-197 1

".

Change "CSA C22.1-1969" to read "CSA 22.1-1972". In the third line change "NFPA 96-1969" to read "NFPA 96-1971".

In the second line change "CSA C22.1-1969" to read "CSA C22.1-1972".

In the third line delete "and automatic fire doors" and insert the word "and" after "flexible connectors". In the fourth line change "NFPA 90A-1969" to read "NFPA 90A-1971".

Revise first line to read, "fire dampers and fire stop

flaps shall be installed in ducts in conformance with Articles 3.1.7.1. and 3.1.5.6".

In first line add: "and fire stop f7aps" after the word "dampers".

Delete Sentences (4), (5) and (6) and renumber Sentences (7) to (1 1) accordingly.

In the second line change "NFPA 90A-1969" to read "NFPA 90A-197 1

".

In the first line change "NFPA 90A-3969" to read "NFPA 90A-1971".

In the second line change "NFPA 90A-1969" to read "NFPA 90A-1971".

In the second line change "NFPA 90A-1969" to read "NFPA 90A-197 1".

Add the following sentence 6.2.5.1 .(3) to read: "(3) Heating appliances using solid fuel shall be connected to a chimncy directly or by a flue pipe or

breeching conforming to Subsection 6.2.8." Revise heading in the middle of page to read: "Boilers and Furnaces Using Solid Fuel". Delete and substitute:

"Boilers and furnaces using solid fuel shall be installed in a room or space having

(a) a volume sufficiently large to permit accessibility to the appliance and to provide clearances as required in Article 6.2.5.5., and

(b) permanent opening o r openings providing an area of at least 1% sq in (10 cm2) per 1000 Btu per hr (293.1 W) input, connecting with the outdoors or with some space that freely connects with the outdoors."

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Change Article "6.2.5.8." to read "6.2.5.8.(2)" and add the following new Sentence 6.2.5.8.( 1 ) :

" S t o , ~ s , r(Jrigrs, .rpcrcr hrutcr.~ and ser,.ice w,utrr hcutcrs using solid fuel shall bc installed in a room or space sufiiciently large to pcrniit accessibility to the uppliuricc and to provide clearances as required in Article 6.2.5.9."

Add to the end of the sentence:

"except that fireclay brick shall be laid w,ith fireclay mortar confc>rniing to ASTM C105-47 (1958), 'Ground Fireclay as a Refractory Mortar for Laying up Fire- clay Brick', or with other mortar approveci for use with fireclay brick."

"Joints of every metal chirnncpy shall be riveted, bolted or welded and such joints shall be at least as corrosion resistant as the sheets or plates so joined." In the second line change "NFPA 82-1 969" to read "NFPA 82-1971

".

In the second line change "CSA C22.1-1969" to read "CSA C22.1-1972".

In the second, third, and fourth lines change "CSA B44-1966 including Supplement No. 3- 1969" to read "CSA B44-1971" and title to read "Safety Code for Elevators, Dumbwaiters, Escalators, and Moving Walks".

Revise first line to read:

"Except when exempted by the authority having jurisdictiorl every interior linen or refuse"

In the second line change the word "shaft" to read "chute".

In the first line change the word "shaft" to read "chute".

"the window sill is at least 3 ft (0.9m) above the adjacent roof level, and at least 2 ft (0.6m) above a roof surface or structure within a horizontal distance of 10 ft (3 m) from the shaft,"

Revise to read :

"Where standpipes are required in a building they shall be installed to provide fire protection during construction in conformance with Article 8.2.2.3. of Part 8 of this Bylaw."

Change the last sentence to read:

"Every zone above 275 ft (83.9 m) having two or more standpipe risers shall be served by at least two supply pipes."

In the third line change "with 50 ft" to read "with not more than 50 ft"

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Pagc Code Hcquircnicnt Revision

254 Table 7.2.2.A.

.Add to the prccent sclltence:

"except that locking devices may be used provided (a) they are desigried to be easily and sali.1~ unlocked

~vithoirt the use of keys after the removal of a properly icientilicd knockout pancl or ylass panel equipped with a knockout or glass breaking device secul-cly fastened to the cabinet adjacent to the panel, and

(b) concise instructions for the renioval or breakage of the panel are permanently and legibly i~iiprintcd on or in the panel or its frame."

Change first line to I-cad :

"The water supply for

1v2

in. hose syste~ns or con- tinuous flow hose reels shall be sufficient to provide a mini~num flow of"

Add a second sentence:

"The water supply for the 2v2 in. hose conrlections required in Sentence 6.7.3.2.(10) for fire department use shall be designed, installed and maintained in accordance with the requirements of the arrtkority having jlrrisdictiotl (see Article 3.2.5.3.)."

In the second and third lines change "a fire department

connection" to read "at least one fire department

connection (see Article 3.2.5.3.)."

Change "on a cast-metal wall plate" to read "on a wall plate of cast-metal o r other material npproved for this use".

In the second line change "NFPA 13-1969" to read "NFPA 13-1971".

In the second line change the word "or" to read "and".

In the first column after the word "Bathtub" add "(with o r without shower)".

In the first line change the words "an opening" to read "a waste opening".

Delete and renumber Sentence 7.2.4.2.(1) as Article 7.2.4.2.

Delete existing article.

Add new Article 7.2.4.3. as follows and renumber existing Article 7.2.4.3. as 7.2.4.4.:

"7.2.4.3.(1) A T-Y fitting shall not be used in a nomittally ltorizontal soil-or-,r.aste pipe except to connect a vent pipe.

"(2) A T-Y fitting shall not be used to change the direction of flow in nornitlally llorizontal drainage piping,

"(3) Except as permitted in Article 7.2.4.5., a T-Y fitting shall be used to connect a cottrinuous vent to a

ture drain."

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Page Code Hequirenlent Revision

Add neu Article 7.2.4.5. as follows and rcnuniber eui\ting Article 7.2.4.5. as Article 7.2.4.6. and Article 7.2.4.6. as Article 7.2.4.7.:

"7.2.3.5. A Y and lhth bend fitting may be used to

connect a f i . ~ t l r r . ~ ~lt.(~itr whobe dicrt?ic~rc~r is more than 2 in. to a cot~tit~rrous \,oit or rlor?iitrully vrrtical soil-or- bcastc pipo that serves as the vent pil~c)."

In the first line change "CGSB 34-GP-22, 1966" to read "CGSB 33-GP-22a, 1970".

In the second and third lines change "CGSB 34-GP-22, 1966" to read "CGSR 34-GP-22n, 1970".

In the first and second lines change "CGSU 33-GP-22, 1966" to read "CGSB 34-GP-22a, 1970".

In the second line change "CGSB 56-GP-la, 1962" to read "CGSB 56-GP-lb, 1970".

In the second and third lines change "ASTM (214-68" to read "ASTM C14-70" at the end of the title add "lncluding Tentative Revision".

In the first line change "CSA 8137-1963" t o read "CSA B137.1-1970".

"7.2.5.8.(3) Plastic pipe shall not exceed 36 ft in slack or vent height.

"(4) Requirements for plastic piping in relation to fire safety shall conform to Sentence 3.1.7.7.(2) and Article 9.10.9.25."

In the first line change "CSA B70-1963" to read "CSA B70-1971".

Renumber as Sentence 7.2.6.1.(1) and add Sentence (2) as follows "7.2.6.1 .(2) Cast-iron soil-or-rtqustepipe and fittings shall not be used in a rtvatt.r systern."

In the first and second line change "ANSI B16.12- 1965" to read "ANSI B16.12-1971".

In the first and second lines change "ANSI B16.4- 1963" to read "ANSI B16.4-1971".

In the first and second lines change " A M 1 R16.3- 1963" to read "ANSI B16.3-1971".

In the first and second lines change "ANSI B16.15- 1964" t o read "ANSI B16.15-1971" and title to read "Cast Bronze Threaded Fittings, 150 and 300 Ib". In the second line change "ANSI B16.24-1962" to read "ANSI 1316.24-1971".

In the first line change "CGSB 77-GP-1, 1962" to read "CGSB 77-GP-la, 1970".

In the first line change "Every cleanout" to read "Every cast-iron cleanout".

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Jn the second line change "ANSI 221.22-1964" to read "ANSI 221.22-1971

".

265 7.3.5.4.(1) Jn the second line change "at the base at the floor" to read "at its base and at the floor".

267 7.3.7.1 .(I) In the second line add the words "or piping is covered" after the word "installed".

267 7.3.7.1 .(2) Delcte and substitute:

"After every fixture is installed and before any part of the clrairrage system or verrting system is placed in operation, a snloke test shall be carried out when requested by the arctlrority havirlg jurisdictior~."

Delete Sentence (2) and renumber Sentence (3) as Sentence (2).

Add new Sentences (3) and (4) as follows:

"7.4.4.1 .(3) A soil-or-tclaste pipe shall not be connected to a nomina1l.v horizontal offset closer than 5 ft (1.5 m) developed length downstrean~ from the base of the upper vertical section of the soil-or-waste stack

where such upper vertical section

(a) receives a discharge of 30 or more fixture units,

or

(b) receives a discharge from fixtures located on two Or more storeys.

"(4) A soil-or-n*aste pipe shall not be connected to a

nomirrally horizorrtal soil-or-\vaste pipe closer than 5 ft (1.5 m) developed length downstream from the base of the soil-or-nwstc stack that

(a) receives a discharge of 30 or more fiture units,

or

(b) receives the discharge from Jix-tures located on two or more storeys."

272 Table 7.4.8.A. 273 7.4.8.5.(1)

"Garbage grinders, potato peelers, and other similar types of equipment shall not be located upstream of a n

iilterceptor."

"Where the discharge from afixture may contain oil or gasoline, an oil irrterceptor shall be installed." Change the third and fourth lines to read:

"installed when required by the authority having ;urisdiction

."

Delete Subclause (i) and renumber Subclause (ii) as (i). In the first line delete the words "two or" and renumber as Subclause (a)(ii).

In Column 1 after "Bathtub" add "(with or without shower)".

"Where a storm drainage system is connected to a

combined bltildirig drain, a combined building sewer, or a

public cornbirred sewer, a trap shall be installed between any opening in the system and the drain or sewer, ex-

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Page Code Requirement Hcvisian

273 7.4.8.5.( 1 ) cept that no trap is rcqi~ired ~f the opening 1s the upper erid of a Icack~r that terminates

(a) at a roof that is uaed only for \\eather protection, and

(b) at least 3 ft (0.9m) above or 12 ft (3.7 ~ n ) in any other direction I'ron~ any air inlet, openable window, or door and 6 ft (1.8 n ~ ) from a property line."

Delete Sentences (I) and (2) and substitute:

"Where a srrbsoil ciruitiagc. pipe is connected to a sani-

tary druirrage sj>steni, the connection shall be made on the ilpstream side of a trap with cleuriorrt or a trapped

sunip. "

Delcte and substitute:

"A srtbsoil ciraitiage pipe that drains into a sariitary

ciraitia~v systmi that is subject to surcharge shall be connccted in such a manner that sc.nsugP cannot back up into the srtbsoilclraitiagc~pipe."

Delete and substiti~tc:

"Manholes may be used as clcatiorrts in a builditig sewer or con10ineci brrilding sewer, pro\ ided

(a) the cievelopcdlerrgr~i from the outer face of the wall of the brriiditi,p to the manhole nearest the outer face of the wall does not exceed 100 ft (30.5 m), (b) the distance between successive manholes does not

exceed 300 ft (91.5 m), and

(c) there is no change in slope or direction between manholes."

Add the word "and" at the end of the clause. Delete and substitute:

"the length of the fixture draiti is niore than 18 in. (457 mm) and the fall does not exceed the diameter." Delete.

Delete Sentences (1) and (2) and substitute:

"(1 j The section of the fixture drairl between the trap and ventpipe connection shall

(a) change direction by not more than 90 deg., or

(b) if the trap is an integral trap which discharges ver- tically,change direction by not more than 180 deg." In the second line change "part of the fixture draiti" to read "part of the branch orfixtlrre drain".

"(1) Except as otherwise required in Articles 7.5.1.2. to 7.5.1.4., a section of a soil-or-wvaste stack or of a branch that is extended as a contir~uous vetlt may serve as a

ventpipe for not more than

(a) one water closet and three other fixtrrres installed on the same floor, provided

(i) the dcvcloped lerigth of each fixture drain does not exceed 5 ft (1.5 rn)

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(ii) all fixt~rres connect separately and directly into the sail-or-rr-aste stack or hrajich (iii) the fi.rtrrrc rirains of the three other fixtures

are not more than 1% in. (38 nim) in diameter a n d connect into the sarl-or-waste stack or hrar~ch above the water closet connection, and (iv) the soil-or-waste stack or branch continues

fill1 size to the highest,fixtureconnection,

or

(b) two water closets and three otherfixtures installed on the same floor provided the installation con- forms to the requirements of Clause (a) and the water closets are connected separately and directly into the stack through an appro\~eddouble fitting." Delete and substitute:

"at least 3 ft (0.9 m) above or 12 ft (3.7 m) in any other direction from every air inlet, openable window or door".

In the first line change "in any direction" to read "in any other direction", and delete " a n d v a t the end of the clause.

At the end of the clause add "and". Add new clause as follows :

"(d) at least 6 ft (1.8 m) from every property line." Change the title "Scope" to read "General". Add new Article 9.1.1.5. as follows:

"Where a building or a component of a building is assembled off the building site in a manner that it cannot be inspected on site, approved off site inspection shall be provided when required by the authority having ;urisdiction to ensure compliance with this Bylaw." Add new sentence as follows:

"This Part applies both to site assembled and factory made buildings."

306 9.3.2.2. In the first line change "CSA A5-1961" to read "CSA A5-1971".

In the third line change "ASTM C494-68" to read "ASTM C494-71".

*307 9.3.3.1. In line,,l after "Table 9.3.3.A.", add and Table 9.3.3.B.

to be deleted in its entirety and replaced by "Lumber grades shall conform to Table 9.3.3.A. or io Table 9.3.3.B. for the particular use as appropriate to the grading rules being applied. On-site cross-cutting of a piece shall not be considered to affect the grade of the piece as originally marked."

*Previously issued as Change Series N o . 1 , 1 July, 1971.

©

NRC

1941

- 2019

World

Rights

Reserved

©

CNRC

1941-2019

Droits

réservés

pour

tous

(26)

to be deleted in its entirety and replaced by "Lumber dimensions of less than i in. referred to in this Part are actual dimensions. Lumber dimensions of 1 in. or more referred to in this Part are nominal dimensions. The corresponding actual dimensions shall be those shown in CSA 0141-1965, 'Softwood Lumber', or CSA 0141- 1970, 'Softwood Lumber', as appropriate for the grading rules being applied."

to be deleted in its entirety and replaced by "Joist, rafter, lintel and beam members up to 5 per cent less than the actual Canadian standard sizes may be used provided the allowable spans for the grade and species of lumber under consideration are reduced 5 per cent from those shown in the span tables."

add new table, Table 9.3.3.B., and notes, as follows: TABLE 9.3.3.B

Forming part of Article 9.3.3.2.

MINIMUM LUMBER GRADES FOR SPECIFIC END USES(1)

7

I

BOARDS

(

FRAMING

1

USE

Stud wall framing - Standard, No. 2

'

(load-bearing members) -

/

-

1 -

I

No. 2

/

(load-bearing members) Common

Plank frame construction Economy No. 5 - No. 5 Economy Economy, Common

I

NO. 3 ' No. 3 Posts and Beams - -

- I

-

Standard, No. 2 (*)

No. 2

Roof Sheathing Standard No. 3 Standard No. 4 I Common

, Sub-flooring Standard No. 3 Standard No. 3

I Common

1

Wall Sheathing ( 5 )

I

Utility

I

1

utility

I

No. 4

-

1

-

I

Notes to Table 9.3.3.B

( I ) Graded in conformance with the 1971 N L G A Standard Grading Rules for Canadian Lumber, pub-

lished by the National Lumber Grades Authority, Vancouver. *Previously issued as Change Series No. 1, 1 July, 197 1 .