Tempo:
Table 26 (continued) Maximum spans for spruce, pine or fir lintels – No. 1 or No. 2 grade – non-structural sheathing7
Lintel Supporting Lintel Supporting Roof ceiling and 2 storeys1,2,5
Lintel Supporting Roof ceiling and 3 storeys1,2,5
Lintel Size, mm in.4 2-ply
1.0 20.9
Maximum Span, m (ft.–in.)2,3 Exterior Walls Specified Snow Load, kPa (psf)6 1.5 2.0 2.5 3.0 31.3 41.8 52.2 62.7
2-38 x 89 2-2 x 4 2-38 x 140 2-2 x 6 2-38 x 184 2-2 x 8 2-38 x 235 2-2 x 10 2-38 x 286 2-2 x 12 2-38 x 89 2-2 x 4 2-38 x 140 2-2 x 6 2-38 x 184 2-2 x 8 2-38 x 235 2-2 x 10 2-38 x 286 2-2 x 12
0.94 3-1 1.34 4-5 1.63 5-4 1.99 6-6 2.31 7-7 0.88 2-11 1.25 4-1 1.52 5-0 1.86 6-1 2.11 6-11
0.88 2-11 1.26 4-2 1.53 5-0 1.87 6-2 2.12 6-11 0.83 2-9 1.19 3-11 1.44 4-9 1.73 5-8 1.96 6-5
0.83 2-9 1.19 3-11 1.44 4-9 1.72 5-8 1.96 6-5 0.80 2-7 1.14 3-9 1.35 4-5 1.62 5-4 1.84 6-1
0.79 2-7 1.13 3-8 1.33 4-4 1.60 5-3 1.82 6-0 0.77 2-6 1.08 3-7 1.27 4-2 1.53 5-0 1.74 5-9
Interior Walls
0.76 2-6 1.06 3-6 1.25 4-1 1.50 4-11 1.71 5-7 0.74 2-5 1.02 3-4 1.21 3-11 1.45 4-9 1.66 5-5
0.64 2-1 0.88 2-11 1.05 3-5 1.27 4-2 1.45 4-9 0.59 1-11 0.81 2-8 0.97 3-2 1.17 3-10 1.35 4-5
Notes to Table 26 1. Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m (16 ft.–0 in.) and a maximum roof truss span of 9.8 m (32 ft.–0 in.). Lintel spans may be increased by 5 per cent if rafter and joist spans are no greater than 4.3 m (14 ft.–1 in.), and roof truss spans are no greater than 8.6 m (28 ft.–3 in.). Spans may be increased by 10 per cent if rafter and joist spans are no greater than 3.7 m (12 ft.–2 in.), and roof truss spans are no greater than 7.4 m (24 ft.–3 in.). 2. If floor joists span the full width of the building without support, lintel spans shall be reduced by 15 per cent for “Roof, ceiling and 1 storey”, by 20 per cent for “Roof, ceiling and 2 storeys” and by 25 per cent for “Roof, ceiling and 3 storeys”. 3. For ends of lintels fully supported by walls, provide minimum 38 mm (11⁄2 in.) of bearing for lintel spans up to 3 m (10 ft.), or minimum 76 mm (3 in.) of bearing for lintel spans greater than 3 m (10 ft.). 4. A single piece of 89 mm (31⁄2 in.) thick lumber may be used in lieu of 2 pieces of 38 mm (11⁄2 in.) thick lumber on edge. 5. Spans apply only where the floors serve residential areas. 6. Spans for 0.6 m (2 ft.) tributary width are calculated for lintels in end walls that support only a 0.6 m (2 ft.) width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses. 7. When structural sheathing is used, lintel spans may be increased by 15 per cent. Structural sheathing consists of a minimum 9.5 mm (3⁄8 in.) thick structural panel conforming to CSA O121, CSA O151, CSA O437 or CSA O325 fastened with at least two rows of fasteners conforming to Table 20 to the exterior face of the lintel, and a single row to the top plates and studs.
Lintel Supporting Lintel Supporting Roof ceiling and 2 storeys1,2,5
Lintel Supporting Roof ceiling and 3 storeys1,2,5
Lintel Size, mm in.4 2-ply
1.0 20.9
Maximum Span, m (ft.–in.)2,3 Exterior Walls Specified Snow Load, kPa (psf)6 1.5 2.0 2.5 3.0 31.3 41.8 52.2 62.7
2-38 x 89 2-2 x 4 2-38 x 140 2-2 x 6 2-38 x 184 2-2 x 8 2-38 x 235 2-2 x 10 2-38 x 286 2-2 x 12 2-38 x 89 2-2 x 4 2-38 x 140 2-2 x 6 2-38 x 184 2-2 x 8 2-38 x 235 2-2 x 10 2-38 x 286 2-2 x 12
0.94 3-1 1.34 4-5 1.63 5-4 1.99 6-6 2.31 7-7 0.88 2-11 1.25 4-1 1.52 5-0 1.86 6-1 2.11 6-11
0.88 2-11 1.26 4-2 1.53 5-0 1.87 6-2 2.12 6-11 0.83 2-9 1.19 3-11 1.44 4-9 1.73 5-8 1.96 6-5
0.83 2-9 1.19 3-11 1.44 4-9 1.72 5-8 1.96 6-5 0.80 2-7 1.14 3-9 1.35 4-5 1.62 5-4 1.84 6-1
0.79 2-7 1.13 3-8 1.33 4-4 1.60 5-3 1.82 6-0 0.77 2-6 1.08 3-7 1.27 4-2 1.53 5-0 1.74 5-9
Interior Walls
0.76 2-6 1.06 3-6 1.25 4-1 1.50 4-11 1.71 5-7 0.74 2-5 1.02 3-4 1.21 3-11 1.45 4-9 1.66 5-5
0.64 2-1 0.88 2-11 1.05 3-5 1.27 4-2 1.45 4-9 0.59 1-11 0.81 2-8 0.97 3-2 1.17 3-10 1.35 4-5
Notes to Table 26 1. Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m (16 ft.–0 in.) and a maximum roof truss span of 9.8 m (32 ft.–0 in.). Lintel spans may be increased by 5 per cent if rafter and joist spans are no greater than 4.3 m (14 ft.–1 in.), and roof truss spans are no greater than 8.6 m (28 ft.–3 in.). Spans may be increased by 10 per cent if rafter and joist spans are no greater than 3.7 m (12 ft.–2 in.), and roof truss spans are no greater than 7.4 m (24 ft.–3 in.). 2. If floor joists span the full width of the building without support, lintel spans shall be reduced by 15 per cent for “Roof, ceiling and 1 storey”, by 20 per cent for “Roof, ceiling and 2 storeys” and by 25 per cent for “Roof, ceiling and 3 storeys”. 3. For ends of lintels fully supported by walls, provide minimum 38 mm (11⁄2 in.) of bearing for lintel spans up to 3 m (10 ft.), or minimum 76 mm (3 in.) of bearing for lintel spans greater than 3 m (10 ft.). 4. A single piece of 89 mm (31⁄2 in.) thick lumber may be used in lieu of 2 pieces of 38 mm (11⁄2 in.) thick lumber on edge. 5. Spans apply only where the floors serve residential areas. 6. Spans for 0.6 m (2 ft.) tributary width are calculated for lintels in end walls that support only a 0.6 m (2 ft.) width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses. 7. When structural sheathing is used, lintel spans may be increased by 15 per cent. Structural sheathing consists of a minimum 9.5 mm (3⁄8 in.) thick structural panel conforming to CSA O121, CSA O151, CSA O437 or CSA O325 fastened with at least two rows of fasteners conforming to Table 20 to the exterior face of the lintel, and a single row to the top plates and studs.
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