ASSOCIATE COMMITTEE ON THE
NATIONAL BUILDING CODE
NATIONAL RESEARCH COUNCIL CANADA
NATIONAL BUILDING CODE OF CANADA 1970
ERRATA
The Associate Committee records the following
corrections to the 1970 edition of the National
Building Code of Canada. The two most important
corrections appear at the beginning of the list.
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113 121 27 41 44 46 46 51 51 62 64 69 78 91 92 96 109 113 Code Requirem.ent 3.3.4.5(1) 3.4.4.1(2) (1 st line)
Table of Contents - Subsection 3.1. 3 3.1. 4. 5(4)(d) 3.1. 5. 6(2)(d) (3rd line) 3.1. 7.1(4) (1st line) 3.1. 7.2(3) (last line) 3.1.11.1(2)(c) (first line) 3.1.11.1(2)(e) 3. 2. 2.19(2)(b) 3. 2. 2. 22( 2)(f) 3.2.2.30(1)(f) (2nd line) Table 3.2. 2. Q 3.2.3.7(1)(b) 3. 2. 3.13(7) (first line) 3.2.4.4(1) (4th line) 3.3.2.8(4) (4th line) 3. 3.4. 2(4) (2nd line) Correction
the words "that serves as an access to an exit" should be added at end of sentence.
after "interior" the words "finish for doors, door fram.es and trim." should be inserted and the words "wall and ceiling" deleted.
page "37" should read "~'.'
"Closs" should read "Class '~
(3m.) should read (3m.m.) , 'I::losure'should read 't:losures ". ''rating"should read 'tatings",
'ceiling"should read"ceilings'~
the word "and" should be added after "~O; ".
the word "a" should be inserted be-fore "2-hr fire separation'~
the word "the" should be deleted. "building"should read'buildings",
"Article 3.2.2.42" should read "Sentence 3.2.2.42(1)".
hyphen between "low fire" should be dde1:ed and the words "fire load" should be in italics.
the words "covered m.all" should be in italics.
the words "service room.s" should be in italics.
'tlete rm.inated"should re ad 'tiete rm.ined". "a" should be deleted.
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an access l at end of "finish d trim" words 'es ".
"
~.
ldded erted be-eleted. ~'. read " should be e load" should be " should be ieterrnined". Page 114 114 130 133 138 167 170 172 187 221 233 233 233 234 234 370 424 424 Code Re9uirement 3. 3.5. 2(1)(b) (1st line) 3.3.6.2(1)(b) (2nd line) 3.5.1. 9(2) (3rd line) 3.5.4.3(3) (4th line) 3.6.4.2(7) (3rd line) 4.2.4.2(a) (3rd line) 4.2.5.3(l) (last line) 4.2.5.B(b) (2nd line) 4.5.2.1 (3rd line) 6. 2.4.1(6) (2nd line) 6.2.8.3(2)(b) (7th line) 6.2.8.3(3)(b) (1st line) 6.2.8.3(3)(b) (2nd line) 6. 2.8.4(3) (2nd line) 6.2.8.4(5)(b) (2nd line) 9.21.5.4 (1st line) 9.34.2.3 (10th line) 9.34.2.3 (8th line) Correction (465m) should read (465m 2) (465m) should read (465m 2 ) the word "is" should be changed to "shall be'!(305m) should read (305rnrn). the letter "A" should read "D'~
-
-the word "Spread" should be inserted between "on" and "Footings'~
the word "Axial" should be inserted between "Vertical" and "Load'~
the period after "loading" should be deleted and "I and" added.
the word "and" between "Plain' and "Reiniorce""d"ilshould read "or'~
(1. 2m) should read (915rnrn). title should read "ASTM CI06- 67. Fireclay Brick and SilicDne Carbide Brick for Incinerator Service~'
the word ''befow'' should read ''be low!' the word "or" should be deleted. the word "Refractory" should be
in-serted between "~" and "Mortar ': the word "Refractory" should be in-serted between '~' and "Mortar'~
the word "fllue" should read "flue. " "CSA B149. 2 -1970" should read "CSA B149. 2-1969" and the word "Burning" should be inserted between "Propane" and 'Appliances ':
the word "Burning" should be inserted between "Gas" and "Appliances ':
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"
,
NATIONAL RESEARCH COUNCIL OF CANADA
ASSOCIATE COMMITTEE ON THE
NATIONAL BUILDING CODE
ERRATA AND RECOMMENDED REVISIONS
to the
NATIONAL BUILDING CODE OF CANADA
1970
CHANGES SERIES No. 1
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CONTENTS Page Errata to NBC... 1 Recommended Revisions to Part 3... 9 to Part 9... 10
Errata to Supplement No.4.. 17
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Page 16 24 25 27 41 41 42 42 44 45 46 46 51
ERRATA
to the
National Building Code of Canada 1970
(first printing)
*
Errata issued 1 July 1971
by the
Associate Committee on the National Building Code
National Research Council of Canada
The Associate Committee on the National Building Code records the following corrections to the first printing of the 1970 edition of the National Building Code of Canada.
ERRATA
Code Requirement Correction
Definition of Drain- Delete "bui1ding" and replace with "public".
age system, line 3
2.2.1.1. between "IBR" and "NFPA" insert "NBC
National Building Code of Canada".
2.2.2.1. delete the periods in "US".
Table of Contents page "37" should read "36".
Subsection 3.1.3.
3. 1.4. 5. (4)(d) "Closs" should read "Class".
3.1.4.6.(5), line 3 "NFPA 701-1966" should read "NFPA 701-1969".
3.1.5.1.(1), line 8 "ASTM El19-67" should read "ASTM Ell9-69".
3.1.5.1.(4), "interior" should read "exterior".
marginal note
3.1.5.6.(2)(d), line 3 "(3m)" should read "(3mm)".
3.1.7.1.(1), line 16 "NFPA 252(1958)" should read "NFPA 252(1969)"
3.1.7.1.(4), line 1 "closure" should read "closures". 3.1.7.2.(3), line 3 "rating" should read "ratings".
3.1.10.1.(1), line 4 "NFPA 255(1966)" should read "NFPA 255(1969)"
·PLEASE NOTE: These corrections have been made in editions of the National Building Code of Canada 1970 issued subsequent to the first printing.
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Page Code Requirement Correction
51 3.1.1 1.1.(2) (c). line 1 "ceiling" should read "ceilings".
51 3.1.11.1.(2) (e) Add "and" after "400;".
52 3.1.12.1(2) (b), line 1 Delete "either".
52 3.1.13. "3.1.13.(1)" should read "3.1.13.1.(1)".
58 Table 3.2.2.A. "Unsprinklered" should be in roman type.
62 3.2.2.19.(2) (b) Insert "a" before "2-hr fire separation".
64 3.2.2.22.(2) (f) Delete "the".
69 3.2.2.30.(1) (f), line 2 "building" should read "buildings".
78 Table 3.2.2.Q. "Artic1e 3.2.2.42" should read "Sentence 3.2.2.42.(1)".
79 Table 3.2.2.S. "Forming Part of 3.2.2.44.(1)" should read "Forming
P'art of Sentence 3.2.2.44.(1)"
82 3.2.2.47.(3), line 2 "unprotected openings" should be in italics.
85 3.2.2.51.(3), line 2 "unprotected openings" should be in italics.
86 3.2.2.52.(3), Hne 2 "unprotected openings" should be in italics.
90 Table 3.2.3.C., "Occupancy Classification of Building" should read
1st column "Occupancy Classification of Fire Compartment".
91 3.2.3.7.(1) (b) Delete the hyphen between "low fire"; "fire load"
should be in italics.
92 3.2.3.13.(7), line 1 "covered mall" should be in italics.
92 3.2.3.13.(10), line 2 Insert "flame spread rating" between "appropriate"
and "requirements".
96 3.2.4.4.(1), line 4 "service rooms" should be in italics.
103 3.2.6.10.(4), line 3 Insert "of" between "classifications" and "not".
103 Table 3.2.6.D., "access to exit" should read "access to exits".
1st column
104 3.3 Interpretation, "necessary" should read "necessarily".
line 4
109 3.3.2.8.(4), line 4 "determinated" should read "determined".
113 3.3.4.2.(4), line 2 Delete "a".
113 3.3.4.5.(1), line 4 delete the period at the end of the sentence and add
"that serves as an access to an exit." 114 3.3.5.2.(1) (b), line 1 "(465m)" should read "(465 m2)".
114 3.3.6.2.(1) (b), line 2 "(465m)" should read "(465m2)".
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Page Code Requirement Correction
116 3.3.7.7.(12), line 2 insert a period after "fire separation" and delete
"un-less otherwise approved."
121 3.4.4.1.(2), line 1 after "interior" the words "finish for doors, door
frames and trim" should be inserted and the words "wall and ceiling" deleted.
122 3.4.6.1.(1) (d), line 1 "fire escape" should be in roman type.
123 3.4.7.1., line 2 "one foot-candle" should read "five foot-candles".
123 3.4.7.2.(1), line 2 "five foot-candles" should read "one foot-candle".
125 3.4.8.9.(1), line 1 "fire escape" should be in roman type.
125 3.4.8.9.(2), line 1 "fire escape" should be in roman type.
130 3.5.1.9.(2), line 1 "where" at the beginning of sentence should be
"Where".
130 3.5.1.9.(2), line 3 change "is" to "shall be".
130 3.5.2.2., line 2 "boilers" should be in italics.
131 3.5.2.7., line 1 "3.5.2.7." should read "3.5.2.7.(1)".
131 3.5.2.7.(1), line 1 the word "furnace" should be in roman type.
131 3.5.3.1.(1), line 5 after "to" and before "requirements" insert "the".
131 Note to Table 3.5.3.A. "fire protection rating" should be in italics.
133 3.5.4.3.(3), line 4 "(305m)" should read "(305mm)".
137 Table 3.6.4.A., "Room" should be in roman type.
Title column 1
137 Table 3.6.4.A., "assembly" should be in italics.
Column 1. Group A Occupancies, Item 9
137 Note (5) to Table "basements" should be in roman type.
3.6.4.A., line 1
138 3.6.4.2.(7), line 3 "Group A" should read "Group D".
142 4.1.1.5.(2), line 1 "Effects" should be deleted and replaced by the word
"Deflections".
150 4.1.6.2., line 3 Insert a comma between "weight" and "low".
152 4.1.7.1.(5) (a), Insert "Ft" at the beginning of the line which should
last line then read: "Ft need not exceed 0.15V ... "
164 4.2.2.6., line 5 "CSA A23.1-1970" should read "CSA A23.1-1967".
167 4.2.4.2.(a), line 3 Insert "Spread" between "on" and "Footings".
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Page Code Requirement 170 4.2.5.3.(1), line 4 170 4.2.5.3.(4) (a), line 1 170 4.2.5.3.(4) (b), line 1 170 4.2.5.5.(b) (iii), line 1 171 4.2.5.7., marginal note 172 4.2.5.13.(b), line 2 172 Note (5) to Table 4.2.5.A., line 1 187 4.5.2.1., line 3 208 List of Standards 208 List of Standards 208 List of Standards 209 List of Standards 209 List of Standards 209 List of Standards 210 List of Standards 210 List of Standards 211 List of Standards 212 List of Standards 214 List of Standards 214 List of Standards 214 List of Standards Correction
Insert "Axial" between "Vertical" and "Load". Delete "and" at the end of sentence.
Delete "and" at the end of sentence.
Delete "apparatus" replace with "equipment". Delete "areas" and replace with "strata".
Delete the period after "loading" and add ", and". the title of "CSA Standard 086-1970" should read "Code of Recommended Practice for Engineering Design in Timber".
change "and" between "Plain" and "Reinforced" to "or".
"A8-1956" should read "A8-1970". "A23.1-1970" should read "A23.l-1967".
"A60.2-1962 Methods of Testing Vitrified Clay Pipe ... 7" should be deleted in its entirety.
"AI23.7-1962" should read "AI23.7-1970"
"AI72-1964 High Pressure, Paper Base, Decorative Laminates ... 9" should be deleted in its entirety. the title of "CSA Standard B54.1 1960" should read "Determination of Non-Combustibility in BuHding Materials (Amended Oct. 1969) ... 2,3 and 9." "Zll-1969 Portable Ladders ... 8" should be deleted in its entirety.
"1l-GP-3 Fibreboard: Hard Pressed" should be deleted and replaced by "11-GP-3a June 1970, Stand-ard for HStand-ardboStand-ard".
"34-GP-14" should read "34-GP-14a" "37-GP-21a" should read "37-GP-21b".
"BI6.23-1969"-the hyphens between the words "Cast" and "Bronze" and "Solder" and" Joint" should be deleted and the letters "DWV" added after the word "Fittings".
"ULC-1O(b) Nov. 1957" should read "ULC-1O(b) Nov. 1970".
below "ULC 723" insert additional standard "ULC-790C 1969 Standards for Test Methods for Fire Resistance of Roof Covering Materials ... 3"
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Page Code Requirement Correction
214 List of Standards below "ULI 723" insert additional standard "ULI 790,
1969 Standards for Test Methods for Fire Resistance of Roof Covering Materials ... 3".
214 List of Standards "NFPA 701-1969". Code Part or Section should read
"3 and 6".
221 6.2.4.1.(1), line 1 "(2) and (3)" should read "(2) to (11)".
221 6.2.4.1.(6), line 2 "(1.2m)" should read "(915mm)".
223 6.2.5.3.(a), line 2 "appliance" should be in italics.
225 Table 6.2.5.A. "boilers" should be in italics.
1st column, 2nd box from top.
233 6.2.8.3.(2) (b), line 7 title should read "ASTM C106-67, Fireclay Brick and
Silicone Carbide Brick for Incinerator Service".
233 6.2.8.3.(3) (b), line 1 the word "befow" should read "below".
233 6.2.8.3.(3) (b), line 2 Delete "or".
234 6.2.8.4.(3), line 2 Insert "Refractory" between "a" and "Mortar".
234 6.2.8.4.(5) (b), line 2 Insert "Refractory" between "a" and "Mortar".
235 6.2.8.6.(2) (b), line 1 "fire-resistance rating" should be in italics.
249 Table of Contents page number for Section 7.3 should be "262".
257 7.2.5.3.(2) (c), line 1 after the word "serving" delete "not more than" and
replace with "one or".
270 duplicate 7.4.5.4. duplicate "7.4.5.4." should be renumbered "7.4.5.5.".
271 7.4.8.1.(1) (a) (ii), "developed length" should be in italics.
line 1
271 7.4.8.1.(1) (a) (ii), delete "weir".
line 1
271 7.4.8.1.(1) (c), line 1 after "fixture" add: ",other than a drinking fountain,".
271 7.4.8.1.(1) (c), line 2 delete "such as a relief valve outlet".
273 Table 7.4.8.A., delete "single and compartment kitchen sink" and
column 1 replace with "1 and 2 compartment kitchen sinks".
277 7.4.11.4.(2), line 3 "28 sq ft" should read "29 sq ftH.
281 7.4.12.8., line 2 Insert a comma after" stack".
281 7.4.12.8., line 2 delete the comma after "vent",
288 Table 7.5.5.C., under "Minimum Diameter of Stack Vent or Vent
column 6. Stack", "2i" should read "2f'.
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Page Code Requirement Correction
291 7.6.2.4.(1) (a) (B), at end of sentence add "and".
line 4
291 7.6.2.5.(1) (a), line 2 at end of sentence add "and".
300 8.2.5.5.(b) after "and" insert a comma and delete "a hat".
300 8.2.5.5. insert new sub-paragraph "(c) a hat."
303 Table of Contents, page number for Section 9.11 should be "346".
Section 9.11
303 Table of Contents, page number for Section 9.12 should be "346".
Section 9.12
304 Table of Contents, Section 9.34-after "Heating" add "and Air
Con-Section 9.34 ditioning" .
320 9.8.7.4., line 2 at end of line delete "at least".
321 9.9.2.2., line 2 "fire escapes" should be in roman type.
322 9.9.2.5., line 1 "fire escapes" should be in roman type.
322 9.9.2.6., line 1 "fire escape" should be in roman type.
324 9.9.5.5., line 2 "fixture" should be in roman type.
329 9.10.3.6., line 6. Delete "Moderate" and replace with "Medium."
and marginal note
335 9.10.9.22., line 1 "Article 9.10.9.24" should read "Article 9.10.9.23.".
336 9.10.9.23., line 10 "(see p. 433)" should read "(see p. 440)".
339 9.10.12.10., line 1 "sprinklers" should be in roman type.
353 9.15.5.5., line 2 "masonry" should be in roman type.
359 9.20.3.1. "CSA A8-1956/' should read "CSA A8-1970,".
361 9.20.6.7., line 3 Insert "to" after "parapet".
364 Table 9.20.1O.A.,
column 1, lines After "Load-bearing walls" delete "or partitions".
1 and 2
367 9.21.1.2., line 1 delete "Smokestacks" and insert "Metal chimneys"
368 9.21.3.2., line 3 after the word "softening" delete "and" and replace
with "or".
369 9.21.4.8., lines "liners" should be in roman type.
1 and 2
370 9.21.5.4., line 1 "fllue" should read "flue".
371 9 .22.1.1., line 2 "Section 9.2." should read "Section 9.3".
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Page Code Requirement Correction
372 9.22.5.2., line 3 delete "arch".
372 9.22.8.1., line 1 "Factory-built fireplaces" should be in roman type.
374 Table 9.23.3.A., "Woods" should read "Wood".
column 1.
381 Table 9.23.12.A., after "two" delete "of" and replace with "or".
column 2, bottom box, line 2
390 9.26.2.3. "9.25.2.3." should read "9.26.2.3.".
394 9.27.4.8., line 4 "imbedded" should read "embedded".
395 9.27.5.2., line 3 Insert a comma after "cement" at end of line.
405 9.28.10.4., line 2 Insert a comma after "ends".
410 9.30.1.1., line 6 "Subsection 9.10" should read Subsection 9.10.17."
411 Table 9.30.5.A., the heading "Min. Weight per sq yd/lb" should read
column 2 "Min Weight lb per sq yd."
413 Note (2) to Table "penetrated" should read penetrate".
9.30.8.A., line 3.
422 Table 9.33.4.A., delete the comma after water closet rooms and draw a
column 2, line 1 solid line across columns 2 and 3 to separate
"Bath-room or water closet "Bath-rooms" and "Unfinished base-ment space".
424 9.34.2.3., line 8 Insert "Burning" between "Gas" and "Appliances".
424 9.34.2.3., line 10 "CSA BI49.2-1970" should read "CSA 149.2-1969"
and the word "Burning" should be inserted between "Propane" and "Appliances".
427 9.34.6.1., lines 2 and 4 Delete "units".
430 9.35.2.3., line 1 Insert "a" before "lighting outlet".
430 Table 9.35.2.A., "Public Hallways and Stairways" should read "Public
column 1 Corridors and Stairways".
431 Marginal note to "Exit lighting" should read "Emergency lighting".
9.35.4.1.
441 Notes to Tables I-A, delete Notes 1 A-A and 1 B-B in their entirety.
I-B and l-C.
455 Table II-G, the figure "20" for 16 in. joist spacing for Standard
column 9 grade Douglas Fir and Western Larch 2 in.x 12 in.
should be changed to read "30".
469 Index-F "Fire larms" should read "Fire alarms".
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Page Code Requirement 470 Index-F 472 Index-H 473 Index-P 473 Index-P 474 Index-R 474 Index-S 476 Index-W Correction
"Flame-spread rating" "vehicular passegeway" should read "vehicular passageway".
"Hydraulics loads" should read "Hydraulic loads". "Pipes" "size and capacity of, 280" should read "size and capacity of, 292",
"Pipes" "support of, 292" should read "support of, 265,266".
"Regigerating systems" should read "Refrigerating systems".
after "Service Rooms" delete "233-230" and insert "223".
"Water systems" "potable, 287, 292, 268" should read "potable, 268, 287-292".
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RECOMMENDED REVISIONS
to the
National Building Code of Canada 1970
The Associate Committee on the National Building Code recommends the following revisions to the 1970 edition of the National Building Code of Canada.
Page Code Requirement
46 3.1.7.2.(4) 96 3.2.4.3., line 3 96 3.2.4.4.(4) 99 3.2.6.2.(1) (a) 99 3.2.6.2.(1) (b) Recommended Revision
to be deleted in its entirety and replaced with the following:
"3.1.7.2.(4) A door having a 20-minutefire-protection
rating or a 1 i-in. solid core wood door may be (a) installed in a door frame of wood of at least 2-in.
nominal thickness, and (b) used as a closure in
(i) a fire 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
(ii) a fire separation required to have a i-hr
fire-resistance rating in buildings not exceeding
3 storeys in building height."
delete all wording after "Subsection 3.2.6." and re-place with the following:
"there shall be direct connection to the fire department headquarters by way of the municipal fire alarm system or an independently owned system or via a central station or proprietary control centre with direct com-munication with the fire department".
to be deleted in its entirety.
to be deleted in its entirety and replaced by the follow-ing:
"every building of Group A, D. E or F occupancy that
is more than
(i) 120 ft (36.6m) in height measured between the floor level of the top storey and grade, or
(ii) 60 ft (18.3m) in height measured between the floor level of the top storey and grade, in which the total number of persons above the
first storey served by any exit stairway exceeds 300 persons per unit of exit width;" to be deleted in its entirety and replaced by the follow-ing:
"every building of Group B or C occupancy that is
more than 60 ft (I8.3m) in height measured between
the floor level of the top storey and grade; and" N.B. The Note in small type between Clauses (a) and (b) remains unchanged.
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Page 99 99 99 99 99 99 99 100 102 102 103 207 307 307 Code Requirement 3.2.6.3.(1), line 1 3.2.6.3.(1) (c) 3.2.6.4.(1), line 2 3.2.6.4.(1) (a) 3.2.6.4.(1) (b) 3.2.6.5.(2) (c) 3.2.6.5.(2) (e) 3.2.6.7.(1), line 2 3.2.6.9.(1), line 5 3.2.6.9.(2) (b), lines 1 and 2 Table 3.2.6.D. 5.1.1.2, line 2 9.3.3.1., line 1 9.3.3.2. Recommended Revision
"Subsection 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."
delete "12 storeys in building height or".
delete the words "between designated points", and substitute, "at approved locations".
delete all words after "facility", and replace with: "which are designed and located so as to be heard in all areas of the building".
delete in its entirety and replace with, "means to activate the fire alarm systems; and".
add new Clause as follows:
"(e) means to automatically transmit to the fire de-partment, 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 automatic sprinkler system, or
(iii) automatic fire detectors actuated by heat, smoke or products of combustion".
"(2) to (4)" should read "(2),(4) and (5)". "3.2.6.7." should read "3.2.6.6.". delete "12 storeys in building height, or".
Change as follows:
For "Corridors providing access to exits except within suites" (in 1st column) change flame spread rating for floor surface from 200 to 300 (in 4th column). For "Elevator cars and vestibules" (in 1st column) change flame spread rating for floor surface from 200 to 300 (in 4th column).
For "Other rooms or spaces" (in 1st column) change flame spread for floor surface from 200 to 300 (in 4th column) and change smoke developed classifications for floor surface from 300 to 500 (in last column). delete and substitute: "Tables 9.3.3.A or 9.3.3.B as appropriate for the grading rules being applied." 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 to 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."
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Page 307 307 308 Code Requirement 9.3.3.4. 9.3.3.5. 9.3.3. Recommended Revision
to be deleted in its entirety and replaced by "Lumber dimensions of less than 1 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(l)
BOARDS FRAMING
Paragraph in the 1971 NLGA grading rules 2-4 2-4 under which boards are graded(2) in. thick in. thick
USE 2-5 6
Eastern in. wide in, &'wider All species white pine
& red pine All All Species Species Para 111 Para 113 Para 114 Para 115
I~tud _~
members) - - Standard, No.2 No.2
I Stud
-
-
- Stud. No.3Utility,
i
No.3.
I
! Floor, roof & ceiling framing -
-I (3) (3)
I Plank frame construction Standard No.3 - No.3 ' No.2
1'- _ .. members) Common
i~lan~ Economy No.5 No.5 Economv. EconomY'j
'- ... members)
i Common Ni 3 No.3
I Posts and Beams
J
-
Standard, No.2 (4) No.2(4}I Roof i Standard No.3
Common Standard No.4
-C'._'- .... . ! - Standard
No.3 Standard No.3
-...
Common
iWall Sheathing(S) Utility No.4 Utility No.4
Common
i
Notes to Table 9.3.3.B
(I) Graded in conformance with the 1971 NLGA Standard Grading Rules for Canadian Lumber, pub-lished by the National Lumber Grades Authority. Vancouver.
(2) To identify board grades, the paragraph number of the NLGA rules under which the lumber is graded must be shown in the grade mark. The grade descriptions in paragraph 113 of the NLG A rules are the same as the 1970 Standard Grading Rules for Western Lumber published by WWPA. The grade descriptions in paragraph 114 are the same as the 1970 Standard Grading Rules for West Coast Lumber, No. 16, published by WCLIB. When graded in accordance with WWPA or WCLIB rules, the grade mark will not contain a paragraph number.
(J) Grades to conform to those listed in "Span Tables for Wood Joists, Rafters and Beams", NRCC Publi-cation No. 11862, (1971). (See Articles 9.23.13.14., and 9.23.13.15., for roof trusses).
(4) Where 5 in. or thicker lumber is used for posts or beams, the grade shall be not less than "Standard".
(5) Where wall sheathing is not required as a nailing base, one grade lower than those specified is permitted.
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Page Code Requirement 308 Table 9.3.3.A., note (3) 309 9.4.2.1., line 3 311 9.5.1.3., line 2 312 9.5.1.5. (new) 312 9.5.3.1., line 4 313 9.5.6.1. line 2 313 9.5.6.2., line 2 314 9.6.3.1., line 1 315 9.6.4.1. 315 9.6.5.2., line 7 316 9.7.2.2., line 1 317 9.7.4.2. 317 9.7.4.4. 317 Table 9.7.4.A. Recommended Revision
delete second sentence in note (3) and replace with "See Articles 9.23.13.14. and 9.23.13.15. for roof trusses."
"area 21 ft. sq." should read "area of 21 ft. by 21ft." add to end of Article "unless otherwise indicated". New Article to read as follows "Areas and dimensions of rooms and spaces may be less than required in this
Section provided it can be shown to the satisfaction of
the authority having jurisdiction that the rooms and spaces are adequate for their intended use, such as by the provision of built-in furniture to compensate for reduced sizes."
change "kitchen, dining and bedroom area" to read kitchen and dining area."
after "area" delete the period and add the following: "where built-in cabinets are not provided and 95 sq ft of floor area where built-in cabinets are provided." after "area" delete the period and add "where built-in cabinets are not provided and 65 sq ft of floor area where built-in cabinets are provided".
after "openings" add "within dwelling units". delete in its entirety and replace with "Exterior wood doors shall be exterior type conforming to CSA 0132. 2-1969, 'Wood Doors'."
delete "door" and replace with "glass".
delete "within dwelling units" and replace with "in
buildings of Residential Occupancy or which are used for sleeping".
delete in its entirety and replace with "Thickness of
glass in windows shall conform to Table 9.7.4.A.
except as provided in Article 9.7.4.3." to be deleted in its entirety.
to be deleted in its entirety and replaced with the following table.
Table 9.7.4.A
Maximum Glass Size for Various Thicknesses Minimum glass
thickness or weight of inner and outer panes
18 oz. 24 oz. 32 oz.
l-g
in.-i'I
in. -lin. Column 1 Sash type or Fixed glazing 120 in. perimeter 168 " 240 280 50 sq ft no limit 212
Factory sealed double Fused edges 180 in. perimeter 252 " 360 420 113 sq ft no limit 3 150 in. perlmt~ter 210 300 350 78 sq ft no limit 4
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Page Code Requirement 317 9.7.5.1. 318 9.8.2.3. 318 9.8.3.5. 318 9.8.3.6. 318 9.8.3.6. (new) 324 325 327 336 336 339 341 9.9.6.5., lines 5, 6 and 7 9.9.7.5. 9.9.10.5., line 3 9.10.9.23., line 6 9.10.9.25 (new) 9.10.12.12., line 1 9.10.14.9. Recommended Revision
to be deleted in its entirety and replaced with "Sealing compound used in the glazing of factory-sealed double-glazed units shall be of an approved type and shall be compatible with the material used to edge seal the units."
to be deleted in its entirety and replaced with "Except for interior stairs within a dwelling unit at least 3 risers shall be provided for interior stairs."
to be deleted in its entirety and replaced with "Public stairways shall have a minimum width between wall faces of at least 3 ft."
renumber as 9.8.3.7.
add new Article 9.8.3.6. "At least one stairway be-tween each floor level in a dwelling unit shall have a
minimum width between wall faces of at least 2 ft 10
in."
last sentence should read "Where more than one door is provided in the width of a doorway in such access
to exit, individual doors shall be not less than 24 in. in width."
to be deleted in its entirety and replaced with "A single exit is permitted from every dwelling unit where such exit is an exterior door located at or near ground level and access to such exit is not through a garage or through a room not under the immediate control of the occupants of the dwelling unit served.
delete "on an opaque background".
Article No. "9.10.14.10." should read "9.10.14.12." add new Article 9.10.9.25. "Plastic drain, waste and vent pipe and plastic electrical conduit shall not be used in systems that pass through or are located in a required fire separation."
delete the words "Shafts enclosing". Sentence now reads, in part: "Refuse and linen chutes exceeding ... " delete in its entirety and replace with "Except as per-mitted in Articles 9.10.5.3., 9.10.5.4., 9.10.14.10., and 9.10.14.11., where a duct pierces a required fire
separation, a fire damper shall be installed in the duct at the fire separation. Dampers required in Subsection 9.10.5. shall be constructed of not less than 0.0667 in.
sheet steel with
t
in. thick asbestos on the unexposedside and be equipped with corrosion resistant pins and hinges. Such dampers shall be designed to close automatically at a temperature of 50°F above the maximum temperature that will normally be en-countered in the system. Other dampers shall conform to Part 6 of this bylaw."
13
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Page Code Requirement 341 9.10.14. 341 9.10.14.10. (new) 341 9.10.14.11 (new) 348 9.13.1.4., line 1 368 9.21.2.4., line 1 375 9.23.4. 375 9.23.4.
t.
(new) 375 9.23.4.2. (new) 375 9.23.4.3. 376 9.23.8.3., line 3 377 9.23.8.4., line 2 380 9.23.12.2. Recommended Revisionadd new Articles 9.10.14.10. and 9.10.14.11. after Article 9.10.14.9. as follows and renumber existing Article 9.10.14.10. as 9.10.14.12. and 9.10.14.11. as 9.10.14.13.
"When a noncombustible branch duct having a melting point of at least 1200°F and a cross-sectional area less than 20 sq. in. pierces a floor atone place only, and supplies only air-conditioning units discharging air at not more than
4 ft. above the floor, no fire damper is required where
the branch duct pierces a required fire separation." "Where a noncombustible branch duct having a melt-ing point of at least 1200°F pierces a required fire
separation around an exhaust duct riser in which the air flow is upward, no fire damper is required provided the branch duct is carried up the riser at least 22 in." should read "When hydrostatic pressure does not occur, floor slabs in unfinished basements or cellars need not"
should read "The size of a chimney flue shall conform", delete Article 9.23.4.1. and substitute the following new articles. Renumber existing Article 9.23.4.2. to read 9.23.4.4.:
"Except as required in Article 9.23.4.4., the spans for wood beams, joists and rafters shall conform to Tables IIA to 11K (page 442) for the uniform live
loads shown in the tables for lumber graded under the grading rules shown in Table 9.3.3.A."
"Except as required in Article 9.23.4.4., the spans for wood joists, rafters and beams shall conform to the spans shown in "Span Tables for Wood Joists, Rafters and Beams", NRCC publication No. 11862, 1971 for the uniform live loads shown in the tables for lumber graded under the grading rules shown in Table 9.3.3.B."
"The spans for steel beams in basements, cellars and crawl spaces in one and two storey dwellings shall conform to Table II-L."
delete the words "conforming to Tables II-J and II-K (page 461),"
after "(page 461)", add "or in 'Span Tables for Wood Joists, Rafters and Beams', NRCC publication No. 11862, 1971."
to be deleted in its entirety and replaced with "Open-ings in load-bearing walls shall be bridged with lintels designed to carry the superimposed loads to adjacent studs, Where two or more members are used in lintels, they shall be fastened together with not less
than
J.i
in. nails in a double row with nails notmore than 18 in. apart in each row. The lintel members may be sepiiirated by filler pieces."
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Page 380 381 383 383 383 383 385 387 388 389 389 Code Requirement 9.23.12.3. (new) Table 9.23.12.A. 9.23.13.4., line 3 9.23.13.13., lines 4 and 5. 9.23.13.14.(new) 9.23.13.14. Table 9.23.16.A. 9.24.2.4. 9.25.1.2. 9.25.4.2. 9.25.4.3. (new) Recommended Revision
add the following new article to be numbered 9.23.12.3.: "In buildings of residential occupancy where the spans of supported joists do not exceed 16 ft. and the spans of trusses do not exceed 32 ft., the spans for wood lintels shown in Table 9.23.12.A. may be used except that where the lumber is graded in conform-ance with the grading rules shown in Table 9.3.3.B., the lintel spans for exterior walls shall be reduced by at least 1 in. per ft. of span."
heading should read "Forming Part of Article 9.23.12.3."
"i"
should read"ti".
insert a period after the words "roof joists" and delete line 5.
add new article after Article 9.23.13.13. as follows: "Roof trusses shall be designed in accordance with the appropriate requirements in Part 4 of this Bylaw, except that where the span of a roof truss does not exceed 40 ft. and the roof truss spacing does not exceed 24 in. o.C., roof trusses are acceptable provided they conform to the requirements in Article 9.23.13.15." renumber as Article 9.23.13.15. and revise first sen-tence as follows: "Where lumber roof trusses not designed in conformance with Part 4 of this bylaw are used as permitted in Article 9.23.13.14., they shall be capable of withstanding a load equal to the ceiling load plus 2t times the design roof snow load, but not less than 60 psf for 24 hr."
in last column opposite "Lumber", delete "see Table 9.3.3.A." and substitute "see Tables 9.3.3.A. and 9.3.3.B."
to be deleted in its entirety and replaced with" Lumber shall conform to the appropriate requirements in Subsection 9.3.3."
to be deleted in its entirety and replaced with "Lumber shall conform to the appropriate requirements in Subsection 9.3.3."
to be deleted in its entirety and replaced with "Open-ings in load-bearing walls shall be bridged with lintels designed to carry superimposed loads to adjacent vertical members."
add new Article 9.25.4.3. to read:
"In buildings of residential occupancy where the spans of supported joists do not exceed 16 ft. and the spans of trusses do not exceed 32 ft., the spans for wood lintels shown in Table 9.25.4.A. may be used except that when the lumber is graded in conformance with the grading rules shown in Table 9.3.3.B. the lintel spans shall be reduced by at least 1 in. per foot of span." present "9.25.4.3." to be renumbered "9.25.4.4."
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Page 389 401 401 405 405 405 406 410 410 412 415 417 420 427 442 Code Requirement Table 9.25.4.A. 9.28.5.7., line 3 9.28.5.8., line 3 9.28.10.1. 9.28.10.3., line 2 9.28.10.4. 9.28.12.1. 9.30.2.1., line 2 9.30.3.1. 9.30.7.5., line 2 9.30.10.1 9.31.2.3., line 8 Subsection 9.32.5. 9.34.6.1., line 4 Foreword to Tables IIA to IlL Recommended Revision
heading should read "Forming Part of Article 9.25.4.3."
"1 i" should read "2". "3i" should read "4".
to be deleted in its entirety and replaced with "Hard-pressed fibreboard siding shall be type 2 or type 4 tempered type, or type 1 untempered type with a factory applied prime coat or finish, conforming to CGSB ll-GP-3a (1970) "Standard for Hardboard."
"l-il"" should read "iff'"
revise first sentence to read "Hard-pressed fibreboard applied in horizontal lapped strips shall have not less
than
lff in. gap provided at butted ends, which shall
be caulked or otherwise protected with suitable mouldings."
to be deleted in its entirety and replaced with "Steel siding, including flashing and trim accessories shall be manufactured from material conforming to CGSB 93-GP-3, (1970), "Steel Sheet, Zinc Coated (Gal-vanized), Prefinished, Standard Duty, for Exterior Use". Such siding shall conform to CGSB 93-GP-4 (1971), "Siding, Soffits and Fascia: Steel, Zinc Coated (Galvanized), Prefinished, Standard Duty."
"4 ft." should read "46 in."
to be deleted in its entirety and replaced with "Wood furring for the attachment of wall finishes shall be not less than i in. by 2 in. where applied to solid backing such as masonry or to supports spaced not more than 16 in. o.c., and i in. by 4 in. where applied to sup-ports spaced not more than 24 in. o.c."
delete period at end of first sentence and add "or an approved liquid bonding agent shall be applied before application of the first coat of plaster."
to be deleted in its entirety and replaced with "Hard-pressed fibreboard shall conform to CGSB I1-GP-3a (1970), Standard for Hardboard."
"CGSB ll-GP-3 (1960), Fibreboard, Hard-pressed," should read, "CGSB ll-GP-3a (1970), Standard for Hardboard."
to be deleted in its entirety and renumber Subsection 9.32.6. and articles accordingly.
"3 units" should read "7 units".
add new sentence to first paragraph as follows: "Spans for lumber dressed to Canadian standard sizes for yard lumber in accordance with CSA 0141-1970, 'Softwood Lumber' are contained in 'Span Tables for Wood Joists, Rafters and Beams', NRCC publication No. 11862, 1971."
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• t
SUPPLEMENT NO.4, "CANADIAN STRUCTURAL
DESIGN MANUAL 1970"
ERRATA
Page 358
Clause 3.2-~Add to the definition of b the following:
",or one half the flange for determining width-thickness ratios (bl t)".
Page 374
Clause 16.2.4-ln the last line of Clause 16.2.4 (b) OJ), delete "Fbt7".
Page 428
Appendix D-Change notes to graph on Page 84 (Appendix D) as follows:
"Co 30 F y
15
but not more than 20""m
Page 558
Notes to Figure CI-7- -Add the fol1owing note:
"7. Windward Wall Cp : The pressure coefficient is 0.8 for the entire height. The
variation shown in pressure is due to variation in exposure factor Ce"
Page 583
Equation (3) for Coefficient C-delete equation and replace with:
C 0.05