SB-3 — Fire and Sound Resistance Tables

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(This Standard is based in large measure on the Fire and Sound Resistance Tables of the National Building Code of Canada 2020)

The following Tables may be used to select building assemblies for compliance with Articles 5.8.1.3., Sentence 9.10.3.1.(1), Articles 9.10.5.1., 9.11.1.3., 9.11.1.4. and Sentence 9.29.5.9.(5) of Division B of the 2024 Building Code.

Tables 1 and 2 have been developed from information gathered from tests. While a large number of the assemblies listed were tested, the fire-resistance and acoustical ratings for others were assigned on the basis of extrapolation of information from tests of similar assemblies. Where there was enough confidence relative to the fire performance of an assembly, the fire-resistance ratings were assigned relative to the commonly used minimum ratings of 30 min, 45 min and 1 h, including a designation of "< 30 min" for assemblies that are known not to meet the minimum 30-minute rating. Where there was not enough comparative information on an assembly to assign to it a rating with confidence, its value in the Tables has been left blank (hyphen), indicating that its rating remains to be assessed through another means

These Tables are provided only for the convenience of Code users and do not limit the number of assemblies permitted to those in the Tables. The notes to Tables 1 and 2 are mandatory parts of the Tables and must be used by designers in complying with the design requirements of a particular assembly. Assemblies not listed or not given a rating in these Tables are equally acceptable provided their fire and sound resistance can be demonstrated to meet the above-noted requirements either on the basis of tests referred to in Article 9.10.3.1. and Subsection 9.11.1. or by using the data in MMAH Supplementary Standard SB-2, "Fire-Performance Ratings". It should be noted, however, that Tables 1 and 2 of this Supplementary Standard are not based on the same assumptions as those used in MMAH Supplementary Standard SB-2. Assemblies in Tables 1 and 2 are described through their generic descriptions and variants and the important details given in the notes to the Tables. Assumptions for MMAH Supplementary Standard SB-2 include different construction details that must be followed rigorously for the calculated ratings to be expected. These are two different methods of choosing assemblies that meet required fire ratings.

Table 2 presents fire-resistance and acoustical ratings for floor, ceiling and roof assemblies. The fire-resistance ratings are appropriate for all assemblies conforming to the construction specifications given in Table 2, including applicable Table notes. Acoustical ratings for assemblies decrease with decreasing depth and decreasing separation of the structural members; the values listed for sound transmission class and impact insulation class are suitable for the minimum depth of structural members identified in the description, including applicable Table notes, and for structural member spacing of 305 mm o.c., unless other values are explicitly listed for the assembly. Adjustments to the acoustical ratings to allow for the benefit of deeper or more widely spaced structural members are given in Table Notes (9) and (10).

For wall, floor and ceiling assemblies, framing spacing previously specified as 16 and 24 inch on centre has been converted to 406 and 610 mm respectively to represent actual framing spacing used in the field to accommodate modular sheathing panel dimensions. These metric dimensions are deemed to comply with test results based on reported framing spacing of 400 mm or 600 mm on centre.

Section 1 Fire and Sound Resistance of Walls

Table 1 Fire and Sound Resistance of Walls^[1]

Type of Wall

Wood Studs
Single Row
Loadbearing or Non-Loadbearing

Wall Number: W1

38 mm × 89 mm wood studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on each side

W1 wall diagram

Table 1 Fire and Sound Resistance of Walls^[1]
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W1a	W1 with 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	1 h	1 h	36
W1b	W1 with 89 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	45 min [1 h]^[8]	34
W1c	W1 with 89 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7] ^[9]	30 min	30 min [45 min]^[8]	32
W1d	W1 with no absorptive material 15.9 mm Type X gypsum board^[7]	1 h	1 h	32
W1e	W1 with no absorptive material 12.7 mm Type X gypsum board^[7]	45 min	45 min	32
Column 2	3	4	5	6

Type of Wall

Wood Studs
Single Row
Loadbearing or Non-Loadbearing

Wall Number: W2

38 mm × 89 mm wood studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
2 layers of gypsum board on each side

W2 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W2a	W2 with 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	38
W2b	W2 with 89 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	38
W2c	W2 with 89 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7]	45 min	1 h	36
W2d	W2 with no absorptive material 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	36
W2e	W2 with no absorptive material 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	35
W2f	W2 with no absorptive material 12.7 mm regular gypsum board^[7]	45 min	1 h	34
Column 2	3	4	5	6

Type of Wall

Wood Studs
Single Row
Loadbearing or Non-Loadbearing

Wall Number: W3

38 mm × 89 mm wood studs spaced 406 mm or 610 mm o.c.
89 mm thick absorptive material^[6]
resilient metal channels on one side spaced 406 mm or 610 mm o.c.
1 layer of gypsum board on each side

W3 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W3a	W3 with studs spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7]	45 min	1 h	45
W3b	W3 with studs spaced 610 mm o.c. 15.9 mm Type X gypsum board^[7]	45 min	1 h	48
W3c	W3 with studs spaced 406 mm or 610 mm o.c. 12.7 mm Type X gypsum board^[7]	45 min	45 min	43
Column 2	3	4	5	6

Type of Wall

Wood Studs
Single Row
Loadbearing or Non-Loadbearing

Wall Number: W4

38 mm × 89 mm wood studs spaced 406 mm or 610 mm o.c.
89 mm thick absorptive material^[6]
resilient metal channels on one side spaced 406 mm or 610 mm o.c.
2 layers of gypsum board on resilient metal channel side
1 layer of gypsum board on other side

W4 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W4a	W4 with studs spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	1 h [1.5 h]^[8]	51
W4b	W4 with studs spaced 610 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	1 h [1.5 h]^[8]	54
W4c	W4 with studs spaced 406 mm o.c. 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	1 h	49
W4d	W4 with studs spaced 610 mm o.c. 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	1 h	53
Column 2	3	4	5	6

Type of Wall

Wood Studs
Single Row
Loadbearing or Non-Loadbearing

Wall Number: W5

38 mm × 89 mm wood studs spaced 406 mm or 610 mm o.c.
89 mm thick absorptive material^[6]
resilient metal channels on one side spaced 406 mm or 610 mm o.c.
1 layer of gypsum board on resilient metal channel side
2 layers of gypsum board on other side

W5 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W5a	W5 with studs spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7]	45 min	1 h	51
W5b	W5 with studs spaced 610 mm o.c. 15.9 mm Type X gypsum board^[7]	45 min	1 h	54
W5c	W5 with studs spaced 406 mm o.c. 12.7 mm Type X gypsum board^[7]	45 min	1 h	49
W5d	W5 with studs spaced 610 mm o.c. 12.7 mm Type X gypsum board^[7]	45 min	1 h	53
Column 2	3	4	5	6

Type of Wall

Wood Studs
Single Row
Loadbearing or Non-Loadbearing

Wall Number: W6

38 mm × 89 mm wood studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
resilient metal channels on one side
2 layers of gypsum board on each side

W6 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W6a	W6 with studs spaced 406 mm or 610 mm o.c. 89 mm thick absorptive material^[6] resilient metal channels spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	55
W6b	W6 with studs spaced 406 mm or 610 mm o.c. with blocking at mid-height^[10] 89 mm thick rock or slag fibre insulation^[11] resilient metal channels spaced 406 mm or 610 mm o.c. 15.9 mm Type X gypsum board^[7]	2 h	2 h	–
W6c	W6 with studs spaced 406 mm o.c. with blocking at mid-height^[10] 89 mm thick dry-blown cellulose fibre insulation^[12] resilient metal channels spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7]	2 h	2 h	–
W6d	W6 with studs spaced 406 mm or 610 mm o.c. 89 mm thick absorptive material^[6] resilient metal channels spaced 610 mm o.c. 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	58
W6e	W6 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] resilient metal channels spaced 406 mm o.c. 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	53
W6f	W6 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] resilient metal channels spaced 610 mm o.c. 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	55
W6g	W6 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] resilient metal channels spaced 406 mm o.c. 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	55
W6h	W6 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] resilient metal channels spaced 610 mm o.c. 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	58
W6i	W6 with studs spaced 406 mm or 610 mm o.c. no absorptive material resilient metal channels spaced 406 mm or 610 mm o.c. 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	47
W6j	W6 with studs spaced 406 mm or 610 mm o.c. no absorptive material resilient metal channels spaced 406 mm or 610 mm o.c. 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	46
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows Staggered on 38 mm × 140 mm plate
Loadbearing or Non-Loadbearing

Wall Number: W7

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. staggered on common 38 mm × 140 mm plate
89 mm thick absorptive material on one side or 65 mm thick on each side^[6]
1 layer of gypsum board on each side

W7 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W7a	W7 with 15.9 mm Type X gypsum board^[7]	1 h	1 h	47
W7b	W7 with 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	45 min [1 h]^[8]	45
W7c	W7 with 12.7 mm regular gypsum board^[7] ^[9]	30 min	30 min [45 min]^[8]	42
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows Staggered on 38 mm × 140 mm plate
Loadbearing or Non-Loadbearing

Wall Number: W8

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. staggered on common 38 mm × 140 mm plate
89 mm thick absorptive material on one side or 65 mm thick on each side^[6]
2 layers of gypsum board on one side
1 layer of gypsum board on other side

W8 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W8a	W8 with 15.9 mm Type X gypsum board^[7]	1 h	1.5 h	52
W8b	W8 with 12.7 mm Type X gypsum board^[7]	45 min	1 h	50
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows Staggered on 38 mm × 140 mm plate
Loadbearing or Non-Loadbearing

Wall Number: W9

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. staggered on common 38 mm × 140 mm plate
with or without absorptive material
2 layers of gypsum board on each side

W9 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W9a	W9 with 89 mm thick absorptive material on one side or 65 mm thick on each side^[6] 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	56
W9b	W9 with 89 mm thick absorptive material on one side or 65 mm thick on each side^[6] 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	55
W9c	W9 with 89 mm thick absorptive material on one side or 65 mm thick on each side^[6] 12.7 mm regular gypsum board^[7]	45 min	1 h	53
W9d	W9 with no absorptive material 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	48
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows Staggered on 38 mm × 140 mm plate
Loadbearing or Non-Loadbearing

Wall Number: W10

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. staggered on common 38 mm × 140 mm plate
with or without absorptive material
resilient metal channels on one side spaced 406 mm or 610 mm o.c.
2 layers of gypsum board on each side

W10 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W10a	W10 with 89 mm thick absorptive material on one side or 65 mm thick on each side^[6] 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	62
W10b	W10 with 89 mm thick absorptive material on one side or 65 mm thick on each side^[6] 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	60
W10c	W10 with no absorptive material 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	50
W10d	W10 with no absorptive material 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	48
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows Staggered on 38 mm × 140 mm plate
Loadbearing or Non-Loadbearing

Wall Number: W11

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. staggered on common 38 mm × 140 mm plate
89 mm thick absorptive material on one side or 65 mm thick on each side^[6]
resilient metal channels on one side spaced 406 mm or 610 mm o.c.
2 layers of gypsum board on resilient channel side
1 layer of gypsum board on other side

W11 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W11a	W11 with 15.9 mm Type X gypsum board^[7]	1 h	1 h	56
W11b	W11 with 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	1 h	54
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows Staggered on 38 mm × 140 mm plate
Loadbearing or Non-Loadbearing

Wall Number: W12

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. staggered on common 38 mm × 140 mm plate
89 mm thick absorptive material on one side or 65 mm thick on each side^[6]
resilient metal channels on one side spaced 406 mm or 610 mm o.c.
1 layer of gypsum board on resilient metal channel side
2 layers of gypsum board on other side

W12 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W12a	W12 with 15.9 mm Type X gypsum board^[7]	45 min	1 h	56
W12b	W12 with 12.7 mm Type X gypsum board^[7]	45 min	1 h	54
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows on Separate Plates
Loadbearing or Non-Loadbearing

Wall Number: W13

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. on separate 38 mm × 89 mm plates set 25 mm apart
with or without absorptive material
1 layer of gypsum board on each side

W13 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W13a	W13 with 89 mm thick absorptive material on each side^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1 h	1 h	57
W13b	W13 with 89 mm thick absorptive material on each side^[6] ^[13] 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	45 min [1 h]^[8]	57
W13c	W13 with 89 mm thick absorptive material on one side only^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1 h	1 h	54
W13d	W13 with 89 mm thick absorptive material on one side only^[6] ^[13] 12.7 mm Type X gypsum board^[7]	45 min	45 min	53
W13e	W13 with no absorptive material 15.9 mm Type X gypsum board^[7]	1 h	1 h	45
W13f	W13 with no absorptive material 12.7 mm Type X gypsum board^[7]	45 min	45 min	45
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows on Separate Plates
Loadbearing or Non-Loadbearing

Wall Number: W14

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. on separate 38 mm × 89 mm plates set 25 mm apart
with or without absorptive material
2 layers of gypsum board on one side
1 layer of gypsum board on other side

W14 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W14a	W14 with 89 mm thick absorptive material on each side^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1 h	1 h [1.5 h]^[8]	61
W14b	W14 with 89 mm thick absorptive material on each side^[6] ^[13] 12.7 mm Type X gypsum board^[7]	45 min	1 h	61
W14c	W14 with 89 mm thick absorptive material on one side only^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1 h	1 h	57
W14d	W14 with 89 mm thick absorptive material on one side only^[6] ^[13] 12.7 mm Type X gypsum board^[7]	45 min	1 h	57
W14e	W14 with no absorptive material 15.9 mm Type X gypsum board^[7]	1 h	1 h	51
W14f	W14 with no absorptive material 12.7 mm Type X gypsum board^[7]	45 min	1 h	51
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows on Separate Plates
Loadbearing or Non-Loadbearing

Wall Number: W15

two rows 38 mm × 89 mm wood studs each spaced 406 mm or 610 mm o.c. on separate 38 mm × 89 mm plates set 25 mm apart
with or without absorptive material
2 layers of gypsum board on each side

W15 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W15a	W15 with 89 mm thick absorptive material on each side^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	66
W15b	W15 with 89 mm thick absorptive material on each side^[6] ^[13] 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	65
W15c	W15 with 89 mm thick absorptive material on each side^[6] ^[13] 12.7 mm regular gypsum board^[7]	45 min	1 h	61
W15d	W15 with 89 mm thick absorptive material on one side only^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	62
W15e	W15 with 89 mm thick absorptive material on one side only^[6] ^[13] 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	60
W15f	W15 with 89 mm thick absorptive material on one side only^[6] ^[13] 12.7 mm regular gypsum board^[7]	45 min	1 h	57
W15g	W15 with no absorptive material 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	56
W15h	W15 with no absorptive material 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	55
W15i	W15 with no absorptive material 12.7 mm regular gypsum board^[7]	45 min	1 h	51
Column 2	3	4	5	6

Type of Wall

Wood Studs
Two Rows on Separate Plates
Loadbearing or Non-Loadbearing

Wall Number: W16

two rows 38 mm × 89 mm studs, each spaced 406 mm or 610 mm o.c. on separate 38 mm × 89 mm plates set 25 mm apart
resilient metal channels on one side spaced 406 mm or 610 mm o.c.
with or without absorptive material
2 layers of gypsum board on each side

W16 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
W16a	W16 with 89 mm thick absorptive material on each side^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	66
W16b	W16 with studs spaced 406 mm o.c. with blocking at mid-height^[10] 89 mm thick rock or slag fibre insulation on each side^[11] resilient metal channels on one side spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[14]	2 h	2 h	–
W16c	W16 with 89 mm thick absorptive material on each side^[6] ^[13] 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	65
W16d	W16 with 89 mm thick absorptive material on one side only^[6] ^[13] 15.9 mm Type X gypsum board^[7]	1.5 h	2 h	62
W16e	W16 with 89 mm thick absorptive material on one side only^[6] ^[13] 12.7 mm Type X gypsum board^[7]	1 h	1.5 h	60
W16f	W16 with no absorptive material 12.7 mm regular gypsum board^[7]	1.5 h	2 h	56
W16g	W16 with no absorptive material 15.9 mm Type X gypsum board^[7]	1 h	1.5 h	55
Column 2	3	4	5	6

Type of Wall

Exterior
Wood Studs
Single Row
Loadbearing and Non-Loadbearing

Wall Number: EW1

wood studs
rock or slag fibre insulation^[11]
1 layer of gypsum board on inside
exterior sheathing and cladding

EW1 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
EW1a	EW1 with 38 mm × 89 mm wood studs spaced 406 mm or 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	1 h	1 h	N/A
EW1b	EW1 with 38 mm × 89 mm studs spaced 406 mm or 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	45 min	1 h	N/A
EW1c	EW1 with 38 mm × 89 mm studs spaced 406 mm or 610 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	45 min	1 h	N/A
EW1d	EW1 with 38 mm × 89 mm studs spaced 406 mm or 610 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	–	45 min	N/A
EW1e	EW1 with 38 mm × 140 mm studs spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior wood sheathing, exterior gypsum sheathing, or insulated exterior sheathing^[20] masonry veneer cladding not less than 89 mm thick	45 min	45 min	N/A
Column 2	3	4	5	6

Type of Wall

Exterior
Wood Studs
Single Row
Loadbearing and Non-Loadbearing

Wall Number: EW2

wood studs
glass fibre insulation^[21]
1 layer of gypsum board on inside
exterior sheathing and cladding

EW2 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
EW2a	EW2 with 38 mm × 89 mm studs spaced 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[22] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[23] and cladding^[19]	1 h	1 h	N/A
EW2b	EW2 with 38 mm × 89 mm studs spaced 406 mm or 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	45 min	1 h	N/A
EW2c	EW2 with 38 mm × 89 mm studs spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] and cladding^[19]	45 min	1 h	N/A
EW2d	EW2 with 38 mm × 89 mm studs spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] and cladding^[19]	N/A	45 min	N/A
EW2e	EW2 with 38 mm × 89 mm studs spaced 406 mm or 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] exterior gypsum sheathing^[18] and cladding^[19]	N/A	45 min	N/A
EW2f	EW2 with 38 mm × 89 mm studs spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] and cladding^[19]	45 min	1 h	N/A
EW2g	EW2 with 38 mm × 89 mm studs spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] and cladding^[19]	–	45 min	N/A
EW2h	EW2 with 38 mm × 89 mm studs spaced 406 mm or 610 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] ^[16] exterior gypsum sheathing^[18] and cladding^[19]	–	45 min	N/A
EW2i	EW2 with 38 mm × 89 mm studs spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] and cladding^[19]	–	45 min	N/A
EW2j	EW2 with 38 mm × 140 mm studs spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior wood sheathing, exterior gypsum sheathing or insulated exterior sheathing^[20] masonry veneer cladding not less than 89 mm thick	45 min	45 min	N/A
Column 2	3	4	5	6

Type of Wall

Exterior
Wood Studs
Single Row
Loadbearing and Non-Loadbearing

Wall Number: EW3

wood studs
dry-blown cellulose fibre insulation^[12]
1 layer of gypsum board on inside
exterior sheathing and cladding

EW3 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
EW3a	EW3 with 38 mm × 89 mm studs spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	1 h	1 h	N/A
EW3b	EW3 with 38 mm × 89 mm studs spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] and cladding^[19]	1 h	1 h	N/A
EW3c	EW3 with 38 mm × 89 mm studs spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior gypsum sheathing^[18] and cladding^[19]	45 min	1 h	N/A
EW3d	EW3 with 38 mm × 89 mm studs spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	45 min	1 h	N/A
EW3e	EW3 with 38 mm × 89 mm studs spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] and cladding^[19]	45 min	1 h	N/A
EW3f	EW3 with 38 mm × 89 mm studs spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	45 min	1 h	N/A
EW3g	EW3 with 38 mm × 89 mm studs spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] ^[16] exterior OSB or plywood sheathing^[17] and cladding^[19]	45 min	1 h	N/A
EW3h	EW3 with 38 mm × 89 mm studs spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] ^[16] exterior gypsum sheathing^[18] and cladding^[19]	N/A	45 min	N/A
EW3i	EW3 with 38 mm × 89 mm studs spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] or exterior gypsum sheathing^[18] and cladding^[19]	N/A	45 min	N/A
EW3j	EW3 with 38 mm × 89 mm studs spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7] ^[15] exterior OSB or plywood sheathing^[17] and cladding^[19]	N/A	45 min	N/A
EW3k	EW3 with 38 mm × 140 mm studs spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7] ^[15] ^[16] exterior wood sheathing, exterior gypsum sheathing or insulated exterior sheathing^[20] masonry veneer cladding not less than 89 mm thick	45 min	45 min	N/A
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S1

31 mm × 64 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on each side

S1 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S1a	S1 with studs spaced 610 mm o.c. 65 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	45 min [1 h]^[8]	43
S1b	S1 with studs spaced 406 mm o.c. 65 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	45 min [1 h]^[8]	39
S1c	S1 with studs spaced 406 mm or 610 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	45 min	35
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S2

31 mm × 64 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on one side
2 layers of gypsum board on other side

S2 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S2a	S2 with studs spaced 610 mm o.c. 65 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	1 h	50
S2b	S2 with studs spaced 406 mm o.c. 65 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	1 h	44
S2c	S2 with studs spaced 610 mm o.c. 65 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1 h	50
S2d	S2 with studs spaced 406 mm o.c. 65 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1 h	42
S2e	S2 with studs spaced 610 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	1 h	41
S2f	S2 with studs spaced 406 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	1 h	37
S2g	S2 with studs spaced 610 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1 h	40
S2h	S2 with studs spaced 406 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1 h	35
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S3

31 mm × 64 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
2 layers of gypsum board on each side

S3 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S3a	S3 with studs spaced 610 mm o.c. 65 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	2 h	54
S3b	S3 with studs spaced 406 mm o.c. 65 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	2 h	51
S3c	S3 with studs spaced 610 mm o.c. 65 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	53
S3d	S3 with studs spaced 406 mm o.c. 65 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	47
S3e	S3 with studs spaced 610 mm o.c. 65 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7]	N/A	1 h	49
S3f	S3 with studs spaced 406 mm o.c. 65 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7]	N/A	1 h	41
S3g	S3 with studs spaced 610 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	2 h	45
S3h	S3 with studs spaced 406 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	2 h	42
S3i	S3 with studs spaced 610 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	44
S3j	S3 with studs spaced 406 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	39
S3k	S3 with studs spaced 610 mm o.c. no absorptive material 12.7 mm regular gypsum board^[7]	N/A	1 h	40
S3l	S3 with studs spaced 406 mm o.c. no absorptive material 12.7 mm regular gypsum board^[7]	N/A	1 h	37
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S4

31 mm × 92 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on each side

S4 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S4a	S4 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	45 min [1 h]^[8]	48
S4b	S4 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	45 min [1 h]^[8]	47
S4c	S4 with studs spaced 610 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	45 min	38
S4d	S4 with studs spaced 406 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	45 min	38
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S5

31 mm × 92 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on one side
2 layers of gypsum board on other side

S5 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S5a	S5 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	1 h [1.5 h]^[8]	53
S5b	S5 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	1 h [1.5 h]^[8]	52
S5c	S5 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1 h [1.5 h]^[8]	51
S5d	S5 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1 h [1.5 h]^[8]	50
S5e	S5 with studs spaced 610 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	1 h	43
S5f	S5 with studs spaced 406 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	1 h	42
S5g	S5 with studs spaced 610 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1 h	41
S5h	S5 with studs spaced 406 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1 h	40
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S6

31 mm × 92 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
2 layers of gypsum board on each side

S6 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S6a	S6 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	2 h	56
S6b	S6 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	2 h	55
S6c	S6 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	55
S6d	S6 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	54
S6e	S6 with studs spaced 610 mm o.c. 89 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7]	N/A	1 h	50
S6f	S6 with studs spaced 406 mm o.c. 89 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7]	N/A	1 h	48
S6g	S6 with studs spaced 610 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	2 h	47
S6h	S6 with studs spaced 406 mm o.c. no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	2 h	45
S6i	S6 with studs spaced 610 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	45
S6j	S6 with studs spaced 406 mm o.c. no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	44
S6k	S6 with studs spaced 610 mm o.c. no absorptive material 12.7 mm regular gypsum board^[7]	N/A	1 h	41
S6l	S6 with studs spaced 406 mm o.c. no absorptive material 12.7 mm regular gypsum board^[7]	N/A	1 h	39
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S7

31 mm × 152 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on each side

S7 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S7a	S7 with 150 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	45 min [1 h]^[8]	51
S7b	S7 with no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	45 min	41
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S8

31 mm × 152 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on one side
2 layers of gypsum board on other side

S8 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S8a	S8 with 150 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	1 h [1.5 h]^[8]	55
S8b	S8 with 150 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1 h [1.5 h]^[8]	54
S8c	S8 with no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	1 h	45
S8d	S8 with no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1 h	44
Column 2	3	4	5	6

Type of Wall

Non-Loadbearing Steel Studs
0.46 mm (25 Gauge)

Wall Number: S9

31 mm × 152 mm steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
2 layers of gypsum board on each side

S9 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S9a	S9 with 150 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	N/A	2 h	59
S9b	S9 with 150 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	57
S9c	S9 with 150 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7]	N/A	1 h	53
S9d	S9 with no absorptive material 15.9 mm Type X gypsum board^[7]	N/A	2 h	49
S9e	S9 with no absorptive material 12.7 mm Type X gypsum board^[7]	N/A	1.5 h	47
S9f	S9 with no absorptive material 12.7 mm regular gypsum board^[7]	N/A	1 h	43
Column 2	3	4	5	6

Type of Wall

Loadbearing Steel Studs
0.84 mm to 1.52 mm thickness

Wall Number: S10

41 mm × 92 mm loadbearing steel studs spaced 406 mm or 610 mm o.c.
with or without cross-bracing on one side
with or without absorptive material
2 layers of gypsum board on each side

S10 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S10a	S10 with 89 mm thick absorptive material^[6] 15.9 mm Type X gypsum board^[7]	1 h	N/A	38
S10b	S10 with 89 mm thick absorptive material^[6] 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	N/A	38
S10c	S10 with 89 mm thick absorptive material^[6] 12.7 mm regular gypsum board^[7]	N/A	N/A	36
S10d	S10 with no absorptive material 15.9 mm Type X gypsum board^[7]	1 h	N/A	36
S10e	S10 with no absorptive material 12.7 mm Type X gypsum board^[7]	1 h	N/A	35
S10f	S10 with no absorptive material 12.7 mm regular gypsum board^[7]	N/A	N/A	34
Column 2	3	4	5	6

Type of Wall

Loadbearing Steel Studs
0.84 mm to 1.52 mm thickness

Wall Number: S11

41 mm × 92 mm loadbearing steel studs spaced 406 mm or 610 mm o.c.
with or without cross-bracing on one side
with or without absorptive material
resilient metal channels on one side
1 layer of gypsum board on each side

S11 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S11a	S11 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	50
S11b	S11 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	47
S11c	S11 with no absorptive material resilient metal channels spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	41
S11d	S11 with no absorptive material resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	39
S11e	S11 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	47
S11f	S11 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	45
S11g	S11 with no absorptive material resilient metal channels spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	38
S11h	S11 with no absorptive material resilient metal channels spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	36
Column 2	3	4	5	6

Type of Wall

Loadbearing Steel Studs
0.84 mm to 1.52 mm thickness

Wall Number: S12

41 mm × 92 mm loadbearing steel studs spaced 406 mm or 610 mm o.c.
with or without cross-bracing on one side
with or without absorptive material
resilient metal channels on one side
2 layers of gypsum board on resilient channel side
1 layer of gypsum board on other side

S12 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S12a	S12 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	54
S12b	S12 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	52
S12c	S12 with no absorptive material resilient metal channels spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	46
S12d	S12 with no absorptive material resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	N/A	N/A	43
S12e	S12 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	52
S12f	S12 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	50
S12g	S12 with no absorptive material resilient metal channels spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	43
S12h	S12 with no absorptive material resilient metal channels spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7]	N/A	N/A	41
Column 2	3	4	5	6

Type of Wall

Loadbearing Steel Studs
0.84 mm to 1.52 mm thickness

Wall Number: S13

41 mm × 92 mm loadbearing steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
resilient metal channels on one side spaced at 406 mm o.c.
2 layers of gypsum board on resilient channel side
1 layer shear membrane and 1 layer gypsum board on other side

S13 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S13a	S13 with 89 mm thick absorptive material^[6] 12.7 mm OSB shear membrane 12.7 mm Type X gypsum board^[7]	30 min	N/A	57
Column 2	3	4	5	6

Type of Wall

Loadbearing Steel Studs
0.84 mm to 1.52 mm thickness

Wall Number: S14

41 mm × 92 mm loadbearing steel studs spaced 406 mm or 610 mm o.c.
with or without absorptive material
resilient metal channels on one side
2 layers of gypsum board on each side

S14 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S14a	S14 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	N/A	60
S14b	S14 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	N/A	57
S14c	S14 with 89 mm thick absorptive material^[6] resilient metal channels spaced at 610 mm o.c. 12.7 mm regular gypsum board^[7]	N/A	N/A	54
S14d	S14 with 89 mm thick absorptive material resilient metal channels spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7]	45 min [1 h]^[8]	N/A	55
S14e	S14 with no absorptive material resilient metal channels spaced at 610 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	N/A	51
S14f	S14 with no absorptive material resilient metal channels spaced at 610 mm o.c. 12.7 mm regular gypsum board^[7]	N/A	N/A	45
S14g	S14 with no absorptive material resilient metal channels spaced at 406 mm o.c. 12.7 mm Type X gypsum board^[7]	1 h	N/A	47
S14h	S14 with studs at 610 mm o.c. 89 mm thick absorptive material resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	N/A	60
S14i	S14 with studs at 406 mm o.c. 89 mm thick absorptive material resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	N/A	58
S14j	S14 with studs at 610 mm o.c. no absorptive material resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	N/A	51
S14k	S14 with studs at 406 mm o.c. no absorptive material resilient metal channels spaced at 406 mm o.c. 15.9 mm Type X gypsum board^[7]	1 h	N/A	49
S14l	S14 with studs at 406 mm o.c. no absorptive material resilient metal channels spaced at 610 mm o.c. 12.7 mm Type X gypsum board^[7]	1 h	N/A	49
S14m	S14 with studs at 610 mm o.c. no absorptive material resilient metal channels spaced at 610 mm o.c. 12.7 mm regular gypsum board^[7]	1 h	N/A	50
Column 2	3	4	5	6

Type of Wall

Loadbearing Steel Studs
0.84 mm to 1.52 mm thickness

Wall Number: S15

2 rows of 41 mm × 92 mm loadbearing steel studs spaced 406 mm or 610 mm o.c. staggered on 152 mm common plate
with cross-bracing
with or without absorptive material
2 layers of gypsum board on each side

S15 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
S15a	S15 with 89 mm thick absorptive material in each cavity^[6] 15.9 mm Type X gypsum board^[7]	1 h	N/A	68
S15b	S15 with 89 mm thick absorptive material in each cavity^[6] 12.7 mm Type X gypsum board^[7]	1 h	N/A	68
S15c	S15 with no absorptive material 15.9 mm Type X gypsum board^[7]	1.5 h	N/A	52
S15d	S15 with no absorptive material 12.7 mm Type X gypsum board^[7]	1 h	N/A	52
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B1

140 mm or 190 mm concrete block

B1 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B1a	140 mm bare concrete block^[5]	1 h	1 h	48
B1b	190 mm bare concrete block^[5]	1.5 h	1.5 h	50
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B2

140 mm or 190 mm concrete block
no absorptive material
1 layer of gypsum-sand plaster or gypsum board on each side

B2 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B2a	B2 with 140 mm concrete block 12.7 mm gypsum-sand plaster	2 h	2 h	50
B2b	B2 with 140 mm concrete block 12.7 mm Type X gypsum board or 15.9 mm Type X gypsum board^[7]	2 h	2 h	47
B2c	B2 with 140 mm concrete block 12.7 mm regular gypsum board^[7]	1.5 h	1.5 h	46
B2d	B2 with 190 mm concrete block 12.7 mm gypsum-sand plaster	2.5 h	2.5 h	51
B2e	B2 with 190 mm concrete block 15.9 mm Type X gypsum board^[7]	3 h	3 h	50
B2f	B2 with 190 mm concrete block 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	49
B2g	B2 with 190 mm concrete block 12.7 mm regular gypsum board^[7]	2 h	2 h	48
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B3

140 mm or 190 mm concrete block
resilient metal channels on one side spaced at 406 mm or 610 mm o.c.
absorptive material filling resilient metal channel space^[6]
1 layer of gypsum board on each side

B3 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B3a	B3 with 140 mm concrete block 12.7 mm Type X gypsum board or 15.9 mm Type X gypsum board^[7]	2 h	2 h	51
B3b	B3 with 140 mm concrete block 12.7 mm regular gypsum board^[7] ^[9]	1.5 h	1.5 h	48
B3c	B3 with 190 mm concrete block 15.9 mm Type X gypsum board^[7]	3 h	3 h	54
B3d	B3 with 190 mm concrete block 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	53
B3e	B3 with 190 mm concrete block 12.7 mm regular gypsum board^[7] ^[9]	2 h	2 h	51
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B4

140 mm or 190 mm concrete block
resilient metal channels on each side spaced at 406 mm or 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on each side

B4 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B4a	B4 with 140 mm concrete block 12.7 mm Type X gypsum board or 15.9 mm Type X gypsum board^[7]	2 h	2 h	47
B4b	B4 with 140 mm concrete block 12.7 mm regular gypsum board^[7] ^[9]	1.5 h	1.5 h	42
B4c	B4 with 190 mm concrete block 15.9 mm Type X gypsum board^[7]	3 h	3 h	50
B4d	B4 with 190 mm concrete block 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	49
B4e	B4 with 190 mm concrete block 12.7 mm regular gypsum board^[7] ^[9]	2 h	2 h	45
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B5

190 mm concrete block
38 mm × 38 mm horizontal or vertical wood strapping on one side spaced at 610 mm o.c.
with or without absorptive material
1 layer of gypsum board on each side

B5 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B5a	B5 with 15.9 mm Type X gypsum board^[7]	3 h	3 h	54
B5b	B5 with 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	53
B5c	B5 with 12.7 mm regular gypsum board^[7] ^[9]	2 h	2 h	51
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B6

140 mm or 190 mm concrete block
38 mm × 38 mm horizontal or vertical wood strapping on each side spaced at 610 mm o.c.
absorptive material filling strapping space on each side^[6]
1 layer of gypsum board on each side

B6 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B6a	B6 with 140 mm concrete block 12.7 mm Type X gypsum board or 15.9 mm Type X gypsum board^[7]	2 h	2 h	57
B6b	B6 with 140 mm concrete block 12.7 mm regular gypsum board^[7] ^[9]	1.5 h	1.5 h	56
B6c	B6 with 190 mm concrete block 15.9 mm Type X gypsum board^[7]	3 h	3 h	60
B6d	B6 with 190 mm concrete block 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	59
B6e	B6 with 190 mm concrete block 12.7 mm regular gypsum board^[7] ^[9]	2 h	2 h	57
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B7

190 mm concrete block
65 mm steel studs each side spaced at 610 mm o.c.
absorptive material filling stud space on each side^[6]
1 layer of gypsum board on each side

B7 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B7a	B7 with 15.9 mm Type X gypsum board^[7]	3 h	3 h	71
B7b	B7 with 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	70
B7c	B7 with 12.7 mm regular gypsum board^[7] ^[9]	2 h	2 h	69
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B8

190 mm concrete block
38 mm × 64 mm wood studs on each side spaced at 610 mm o.c.
absorptive material filling stud space on each side^[6]
1 layer of gypsum board on each side

B8 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B8a	B8 with 15.9 mm Type X gypsum board^[7]	3 h	3 h	71
B8b	B8 with 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	70
B8c	B8 with 12.7 mm regular gypsum board^[7] ^[9]	2 h	2 h	69
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B9

190 mm concrete block
50 mm metal Z-bars on each side spaced at 610 mm o.c. (or 38 mm × 38 mm horizontal or vertical wood strapping plus resilient metal channels)
absorptive material filling Z-bar space on each side^[6]
1 layer of gypsum board on each side

B9 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B9a	B9 with 15.9 mm Type X gypsum board^[7]	3 h	3 h	65
B9b	B9 with 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	64
B9c	B9 with 12.7 mm regular gypsum board^[7] ^[9]	2 h	2 h	63
Column 2	3	4	5	6

Type of Wall

Hollow Concrete Block (Normal Weight Aggregate)

Wall Number: B10

190 mm concrete block
resilient metal channels on one side spaced at 610 mm o.c.
absorptive material filling resilient metal channel space^[6]
2 layers of gypsum board on one side only

B10 wall diagram

Table 1 (continued) — Fire and Sound Resistance of Walls
Wall Number	Description	Fire-Resistance Rating - Loadbearing	Fire-Resistance Rating - Non-Loadbearing	Typical Sound Transmission Class^[2] ^[4] ^[5] (STC)
B10a	B10 with 15.9 mm Type X gypsum board^[7]	3 h	3 h	56
B10b	B10 with 12.7 mm Type X gypsum board^[7]	2.5 h	2.5 h	55
B10c	B10 with 12.7 mm regular gypsum board^[7]	2 h	2 h	54
Column 2	3	4	5	6

Notes to Table 1:

Reserved.
Fire-resistance ratings and STC ratings of wood-frame construction were evaluated only for assemblies with solid-sawn 38 mm × 89 mm lumber. However, the fire-resistance ratings and STC ratings provided for 38 mm × 89 mm wood-frame assemblies may be applied to wood-frame assemblies with solid-sawn 38 mm × 140 mm lumber; in some cases the ratings may be conservative. Where 38 mm × 140 mm framing is used and absorptive material is called for, the absorptive material must be 140 mm thick. (See 1.2.1.(2) in MMAH Supplementary Standard SB-2 for the significance of fire-resistance ratings).
The STC ratings may also be applied to fingerjoined lumber. The fire-resistance ratings are applicable to wall assemblies using fingerjoined lumber that has been manufactured with a heat-resistant adhesive (HRA) in accordance with NLGA special product standard SPS-1-2017 "Fingerjoined Structural Lumber", or SPS-3-2017, "Fingerjoined 'Vertical Stud Use Only' Lumber". (See also Appendix Note A-9.23.10.4.(1) under Division B in Appendix A of the Building Code).
For all fire-resistance ratings, the given spacing for framing is a maximum value.
Sound ratings listed are based on the most reliable laboratory test data available for specimens conforming to installation details required by CSA A82.31-M1980, "Gypsum Board Application". Results of specific tests may differ slightly because of measurement precision and minor variations in construction details. These results should only be used where the actual construction details, including spacing of fasteners and supporting framing, correspond exactly to the details of the test specimens on which the ratings are based. For wood- and steel-framed assemblies, if the fasteners are spaced less than 300 mm o.c., subtract 1 from the sound transmission class value; if the fasteners are spaced less than 200 mm o.c., subtract 2 from the sound transmission class value. Narrower fastener spacing is not detrimental to the fire-resistance rating. Assemblies with sound transmission class ratings of 50 or more require methods to minimize airborne sound transmission at electrical boxes and other openings, and at the junction of intersecting walls and floors, except intersection of walls constructed of concrete or solid masonry units where the masonry joints at the intersection are mortared.
Sound ratings are only valid where there are no discernible cracks or voids in the visible surfaces. For concrete block walls, surfaces must be sealed by at least 2 coats of paint or other surface finish described in Section 9.29. of Division B of the Building Code to prevent sound leakage.
Sound absorptive material includes fibre processed from rock, slag, glass or cellulose fibre. It must fill at least 90% of the cavity thickness for the wall to provide the listed STC value. The absorptive material should not overfill the cavity to the point of producing significant outward pressure on the finishes; such an assembly will not achieve the STC rating. Where the absorptive material used with steel stud assemblies is in batt form, "steel stud batts", which are wide enough to fill the cavity from the web of one stud to the web of the adjacent studs, must be used.
The complete descriptions of indicated finishes are as follows:
- 12.7 mm regular gypsum board — 12.7 mm regular gypsum board conforming to Article 9.29.5.2. of Division B of the Building Code.
- 12.7 mm Type X gypsum board — 12.7 mm special fire-resistant Type X gypsum board conforming to Article 9.29.5.2. of Division B of the Building Code.
- 15.9 mm Type X gypsum board — 15.9 mm special fire-resistant Type X gypsum board conforming to Article 9.29.5.2. of Division B of the Building Code.
- Except for exterior walls (see Note 15), the outer layer of finish on both sides of the wall must have its joints taped and finished.
- Except as otherwise required for fastener spacing (see Table Notes (14), (16) and (22)), fastener type, spacing and penetration depth for the attachment of gypsum board must conform to Subsection 9.29.5. of Division B of the Building Code and fasteners must consist of
  - nails or screws when attaching gypsum board to wood studs or wood strapping, and
  - screws when attaching gypsum board to cold-formed steel studs or resilient metal channels.
Absorptive material required for the higher fire-resistance rating shall be mineral fibre processed from rock or slag with a mass per unit of wall surface of at least 4.8 kg/m² for 150 mm thickness, 2.8 kg/m² for 89 mm thickness and 2.0 kg/m² for 65 mm thickness and shall completely fill the wall cavity. For assemblies with double wood studs on separate plates, absorptive material is required in the stud cavities on both sides.
Regular gypsum board used in single layer assemblies must be installed so all edges are supported.
The fire-resistance rating values are achieved as follows:
- for a single row of studs, by installing blocking at a spacing of not more than 1 524 mm o.c. as shown in Case A of Figure 5, or
- for two rows of studs on separate plates, by installing blocking in both rows at a spacing of not more than 1 524 mm o.c. as shown in Case B of Figure 5.
The mineral fibre insulation processed from rock or slag shall have a mass per unit area of wall surface of not less than 4.48 kg/m² for 140 mm thickness and 2.85 kg/m² for 89 mm thickness and shall completely fill the wall cavity.
The dry-blown cellulose fibre insulation shall have a mass per unit area of wall surface of not less than 6.80 kg/m² for 140 mm thickness and 4.32 kg/m² for 89 mm thickness and shall completely fill the wall cavity.
Where bracing material, such as diagonal lumber or plywood, OSB, gypsum board or fibreboard sheathing is installed on the inner face of one row of studs in double stud assemblies, the STC rating will be reduced by 3 for any assemblies containing absorptive material in both rows of studs or in the row of studs opposite to that to which the bracing material is attached. Attaching such layers on both inner faces of the studs may drastically reduce the STC value but enough data to permit assignment of STC ratings for this situation is not available. The fire-resistance rating is not affected by the inclusion of such bracing.
For the attachment of the gypsum board, fasteners shall be spaced at not more than 200 mm (nominal) o.c. along the framing members and resilient metal channels in both the base and face layers.
For exterior walls, the finish joints must be taped and finished for the outer layer of the interior side only.
For the attachment of the gypsum board on the interior side of exterior wall assemblies, fasteners shall be spaced at not more than 200 mm (nominal) o.c. along the framing members. All joints shall be backed with lumber having the same dimensions as the framing members as shown in Figures 6 and 7. For EW1e, EW2j and EW3k walls, blocking shall be installed at a spacing of not more than 1 524 mm o.c. as shown in Case A of Figure 5 where joints are backed at a spacing of more than 1 524 mm o.c. along the height of the wall.
The exterior OSB or plywood sheathing shall be not less than 11.1 mm thick and shall be installed with a gap of not less than 2 mm between sheets. Fastener types and spacing shall conform to Table 9.23.3.5.-A of Division B of the Building Code. All joints shall be backed with lumber having the same dimensions as the framing members as shown in Figures 6 and 7.
The exterior gypsum sheathing shall be Type X gypsum sheathing not less than 15.9 mm thick. Fasteners shall be spaced at not more than 200 mm (nominal) o.c. along the framing members.
Any cladding allowed under Part 9 is permitted. The cladding can include foamed plastic and other insulations outboard of the sheathing, where permitted by spatial separation requirements in Subsection 9.10.14. or 9.10.15. of Division B of the Building Code. Where OSB or plywood sheathing acts as the cladding, no additional outboard cladding is required, but is permitted.
Includes any exterior wall sheathing listed in Table 9.23.17.2.-A of Division B of the Building Code and masonry veneer cladding conforming to Section 9.20. of Division B of the Building Code. Foamed plastic sheathing is permitted in EW1e, EW2j and EW3k walls without the use of other sheathing, provided it is directly attached to the framing.
The glass fibre insulation shall have a mass per unit area of wall surface of not less than 1.30 kg/m² for 140 mm thickness and 1.0 kg/m² for 89 mm thickness and shall completely fill the wall cavity.
For the attachment of the gypsum board on the interior side of exterior wall assemblies, fasteners shall be spaced at not more than 150 mm (nominal) o.c. along the edges and 200 mm (nominal) o.c. along the intermediate supports. All joints shall be backed with lumber having the same dimensions as the framing members as shown in Figures 6 and 7.
The exterior gypsum sheathing shall be not less than 12.7 mm thick. Fasteners shall be spaced at not more than 200 mm (nominal) o.c. along the framing members.

Section 2 Fire and Sound Resistance of Floors, Ceilings and Roofs

Table 2 Fire and Sound Resistance of Floors, Ceilings and Roofs^[1]