Tempo:
Table 25 Size and spacing of studs Type of Wall
Interior
Exterior
Supported Loads (including dead loads)
Minimum Stud Size mm (in.)
Maximum Stud Spacing, mm (in.)
Maximum Unsupported Height m (ft.–in.)
No load
38 x 38 (2 x 2) 38 x 89 (2 x 4) flat1
400 (16) 400 (16)
2.4 (8–0) 3.6 (11–10)
Attic not accessible by a stairway
38 x 64 (2 x 3) 38 x 64 (2 x 3) flat1 38 x 89 (2 x 4) 38 x 89 (2 x 4) flat1
600 (24) 400 (16) 600 (24) 400 (16)
3.0 (9–10) 2.4 (8–0) 3.6 (11–10) 2.4 (8–0)
Attic accessible by a stairway plus one floor Roof load plus one floor Attic not accessible by a stairway plus two floors
38 x 89 (2 x 4)
400 (16)
3.6 (11–10)
Roof load Attic accessible by a stairway Attic not accessible by a stairway plus one floor
38 x 64 (2 x 3) 38 x 89 (2 x 4)
400 (16) 600 (24)
2.4 (8–0) 3.6 (11–10)
Attic accessible by a stairway plus two floors Roof load plus two floors
38 x 89 (2 x 4) 38 x 140 (2 x 6)
300 (12) 400 (16)
3.6 (11–10) 4.2 (13–9)
Attic accessible by a stairway plus three floors
38 x 140 (2 x 6)
300 (12)
4.2 (13–9)
Roof with or without attic storage
38 x 64 (2 x 3) 38 x 89 (2 x 4)
400 (16) 600 (24)
2.4 (8–0) 3.0 (9–10)
Roof with or without attic storage plus one floor
38 x 89 (2 x 4) 38 x 140 (2 x 6)
400 (16) 600 (24)
3.0 (9–10) 3.0 (9–10)
Roof with or without attic storage plus two floors
38 x 89 (2 x 4) 38 x 140 (2 x 6)
300 (12) 400 (16)
3.0 (9–10) 3.6 (11–10)
Roof with or without attic storage plus three floors
38 x 140 (2 x 6)
300 (12)
1.8 (6–0)
Note to Table 25 1. Studs on the flat are permitted to be used in gable ends of roofs that contain only unfinished space or in non-loadbearing interior walls within the limits described in the National Building Code of Canada. Studs supporting only a load from an attic not accessible from a stairway are permitted to be placed on the flat, in accordance with this table, if they are clad on not less than one side with plywood, OSB, or waferboard sheathing fastened to the face of the studs with a structural adhesive, and if the portion of the roof supported by the studs does not exceed 2.1 m (6 ft.–10 in.) in width.
Interior
Exterior
Supported Loads (including dead loads)
Minimum Stud Size mm (in.)
Maximum Stud Spacing, mm (in.)
Maximum Unsupported Height m (ft.–in.)
No load
38 x 38 (2 x 2) 38 x 89 (2 x 4) flat1
400 (16) 400 (16)
2.4 (8–0) 3.6 (11–10)
Attic not accessible by a stairway
38 x 64 (2 x 3) 38 x 64 (2 x 3) flat1 38 x 89 (2 x 4) 38 x 89 (2 x 4) flat1
600 (24) 400 (16) 600 (24) 400 (16)
3.0 (9–10) 2.4 (8–0) 3.6 (11–10) 2.4 (8–0)
Attic accessible by a stairway plus one floor Roof load plus one floor Attic not accessible by a stairway plus two floors
38 x 89 (2 x 4)
400 (16)
3.6 (11–10)
Roof load Attic accessible by a stairway Attic not accessible by a stairway plus one floor
38 x 64 (2 x 3) 38 x 89 (2 x 4)
400 (16) 600 (24)
2.4 (8–0) 3.6 (11–10)
Attic accessible by a stairway plus two floors Roof load plus two floors
38 x 89 (2 x 4) 38 x 140 (2 x 6)
300 (12) 400 (16)
3.6 (11–10) 4.2 (13–9)
Attic accessible by a stairway plus three floors
38 x 140 (2 x 6)
300 (12)
4.2 (13–9)
Roof with or without attic storage
38 x 64 (2 x 3) 38 x 89 (2 x 4)
400 (16) 600 (24)
2.4 (8–0) 3.0 (9–10)
Roof with or without attic storage plus one floor
38 x 89 (2 x 4) 38 x 140 (2 x 6)
400 (16) 600 (24)
3.0 (9–10) 3.0 (9–10)
Roof with or without attic storage plus two floors
38 x 89 (2 x 4) 38 x 140 (2 x 6)
300 (12) 400 (16)
3.0 (9–10) 3.6 (11–10)
Roof with or without attic storage plus three floors
38 x 140 (2 x 6)
300 (12)
1.8 (6–0)
Note to Table 25 1. Studs on the flat are permitted to be used in gable ends of roofs that contain only unfinished space or in non-loadbearing interior walls within the limits described in the National Building Code of Canada. Studs supporting only a load from an attic not accessible from a stairway are permitted to be placed on the flat, in accordance with this table, if they are clad on not less than one side with plywood, OSB, or waferboard sheathing fastened to the face of the studs with a structural adhesive, and if the portion of the roof supported by the studs does not exceed 2.1 m (6 ft.–10 in.) in width.
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