Span Tables

Table A-1
Maximum Spans for Floor Joists – General Cases(1)
Forming part of Sentence 9.23.4.2.(1)
Commercial Designation Grade Joist Size, mm Maximum Span, m

With Strapping(2)

 With Bridging

With Strapping(2) and Bridging

Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm
300 400 600 300 400 600 300 400 600
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 38 x 89 2.13 1.97 1.73 2.19 1.99 1.73 2.19 1.99 1.73
38 x 140 3.23 3.07 2.73 3.44 3.12 2.73 3.44 3.12 2.73
38 x 184 3.88 3.69 3.51 4.18 3.92 3.59 4.37 4.07 3.59
38 x 235 4.57 4.34 4.13 4.86 4.57 4.29 5.05 4.70 4.39
38 x 286 5.21 4.95 4.71 5.49 5.16 4.85 5.66 5.28 4.92
No. 1 and No. 2 38 x 89 2.00 1.85 1.66 2.09 1.90 1.66 2.09 1.90 1.66
38 x 140 3.09 2.91 2.62 3.29 2.99 2.62 3.29 2.99 2.62
38 x 184 3.71 3.53 3.36 4.00 3.76 3.44 4.19 3.90 3.44
38 x 235 4.38 4.16 3.96 4.66 4.38 4.11 4.84 4.51 4.20
38 x 286 4.99 4.75 4.52 5.26 4.94 4.65 5.43 5.06 4.72
No. 3 38 x 89 1.90 1.69 1.38 1.95 1.69 1.38 1.95 1.69 1.38
38 x 140 2.78 2.41 1.97 2.78 2.41 1.97 2.78 2.41 1.97
38 x 184 3.38 2.93 2.39 3.38 2.93 2.39 3.38 2.93 2.39
38 x 235 4.14 3.58 2.93 4.14 3.58 2.93 4.14 3.58 2.93
38 x 286 4.80 4.16 3.39 4.80 4.16 3.39 4.80 4.16 3.39
Construction 38 x 89 1.90 1.77 1.61 2.03 1.84 1.61 2.03 1.84 1.61
Standard 38 x 89 1.81 1.63 1.33 1.88 1.63 1.33 1.88 1.63 1.33
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 38 x 89 2.08 1.93 1.71 2.16 1.96 1.71 2.16 1.96 1.71
38 x 140 3.18 3.03 2.69 3.39 3.08 2.69 3.39 3.08 2.69
38 x 184 3.82 3.64 3.46 4.12 3.87 3.54 4.31 4.02 3.54
38 x 235 4.50 4.28 4.08 4.80 4.51 4.23 4.98 4.64 4.33
38 x 286 5.14 4.89 4.65 5.42 5.09 4.78 5.59 5.21 4.86
No. 1 and No. 2 38 x 89 2.00 1.85 1.66 2.09 1.90 1.66 2.09 1.90 1.66
38 x 140 3.09 2.91 2.62 3.29 2.99 2.62 3.29 2.99 2.62
38 x 184 3.71 3.53 3.36 4.00 3.76 3.44 4.19 3.90 3.44
38 x 235 4.38 4.16 3.96 4.66 4.38 4.11 4.84 4.51 4.20
38 x 286 4.99 4.75 4.52 5.26 4.94 4.65 5.43 5.06 4.72
No. 3 38 x 89 1.90 1.77 1.61 2.03 1.84 1.61 2.03 1.84 1.61
38 x 140 2.99 2.78 2.43 3.19 2.90 2.43 3.19 2.90 2.43
38 x 184 3.60 3.42 2.95 3.88 3.61 2.95 4.06 3.61 2.95
38 x 235 4.24 4.03 3.61 4.51 4.24 3.61 4.68 4.37 3.61
38 x 286 4.84 4.60 4.19 5.10 4.79 4.19 5.26 4.90 4.19
Construction 38 x 89 1.90 1.77 1.61 2.03 1.84 1.61 2.03 1.84 1.61
Standard 38 x 89 1.81 1.68 1.39 1.96 1.71 1.39 1.96 1.71 1.39
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 38 x 89 1.95 1.81 1.64 2.06 1.87 1.64 2.06 1.87 1.64
38 x 140 3.05 2.85 2.57 3.24 2.95 2.57 3.24 2.95 2.57
38 x 184 3.66 3.48 3.31 3.94 3.70 3.38 4.12 3.84 3.38
38 x 235 4.31 4.10 3.90 4.59 4.31 4.05 4.76 4.44 4.14
38 x 286 4.91 4.67 4.45 5.18 4.87 4.57 5.34 4.98 4.64
No. 1 and No. 2 38 x 89 1.86 1.72 1.58 1.99 1.81 1.58 1.99 1.81 1.58
38 x 140 2.92 2.71 2.49 3.14 2.85 2.49 3.14 2.85 2.49
38 x 184 3.54 3.36 3.20 3.81 3.58 3.27 3.99 3.72 3.27
38 x 235 4.17 3.96 3.77 4.44 4.17 3.92 4.60 4.29 4.00
38 x 286 4.75 4.52 4.30 5.01 4.71 4.42 5.17 4.82 4.49
No. 3 38 x 89 1.81 1.68 1.55 1.96 1.78 1.55 1.96 1.78 1.55
38 x 140 2.84 2.64 2.43 3.08 2.80 2.43 3.08 2.80 2.43
38 x 184 3.47 3.30 2.95 3.74 3.52 2.95 3.92 3.61 2.95
38 x 235 4.09 3.89 3.61 4.36 4.09 3.61 4.52 4.22 3.61
38 x 286 4.67 4.44 4.19 4.92 4.62 4.19 5.08 4.73 4.19
Construction 38 x 89 1.81 1.68 1.55 1.96 1.78 1.55 1.96 1.78 1.55
Standard 38 x 89 1.70 1.58 1.44 1.88 1.71 1.44 1.88 1.71 1.44
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 38 x 89 1.65 1.53 1.42 1.84 1.68 1.46 1.84 1.68 1.46
38 x 140 2.59 2.41 2.24 2.90 2.63 2.30 2.90 2.63 2.30
38 x 184 3.27 3.11 2.94 3.52 3.31 3.03 3.69 3.44 3.03
38 x 235 3.85 3.66 3.48 4.10 3.85 3.62 4.26 3.97 3.70
38 x 286 4.39 4.18 3.97 4.63 4.35 4.09 4.78 4.45 4.15
No. 1 and No. 2 38 x 89 1.59 1.48 1.37 1.80 1.64 1.43 1.80 1.64 1.43
38 x 140 2.51 2.33 2.16 2.83 2.57 2.25 2.83 2.57 2.25
38 x 184 3.19 3.04 2.84 3.44 3.23 2.96 3.60 3.36 2.96
38 x 235 3.76 3.58 3.41 4.01 3.77 3.54 4.16 3.88 3.62
38 x 286 4.29 4.08 3.88 4.53 4.25 4.00 4.67 4.35 4.06
No. 3 38 x 89 1.54 1.43 1.32 1.74 1.57 1.36 1.76 1.60 1.36
38 x 140 2.42 2.24 1.94 2.74 2.38 1.94 2.75 2.38 1.94
38 x 184 3.12 2.90 2.37 3.35 2.90 2.37 3.35 2.90 2.37
38 x 235 3.67 3.49 2.89 3.91 3.54 2.89 4.06 3.54 2.89
38 x 286 4.19 3.98 3.36 4.42 4.11 3.36 4.55 4.11 3.36
Construction 38 x 89 1.54 1.43 1.32 1.74 1.57 1.40 1.76 1.60 1.40
Standard 38 x 89 1.48 1.37 1.15 1.63 1.41 1.15 1.63 1.41 1.15
Notes to Table A-1:
(1) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3.
(2) See Sentence 9.23.9.4.(5) for alternatives to strapping.
Table A-2
Maximum Spans for Floor Joists – Special Cases(1)
Forming part of Sentences 9.23.4.2.(1) and 9.23.4.4.(2)
Commercial Designation Grade Joist Size, mm Maximum Span, m
Joists with Ceilings Attached to Wood Furring Joists with Concrete Topping
Without Bridging With Bridging

With or Without Bridging(2)
Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm
300 400 600 300 400 600 300 400 600
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 38 x 89 2.19 1.99 1.73 2.19 1.99 1.73 2.19 1.99 1.73
38 x 140 3.44 3.12 2.73 3.44 3.12 2.73 3.44 3.12 2.73
38 x 184 4.24 3.99 3.59 4.52 4.11 3.59 4.52 4.11 3.59
38 x 235 4.98 4.69 4.29 5.47 5.20 4.58 5.77 5.24 4.58
38 x 286 5.67 5.34 4.88 6.19 5.89 5.54 6.83 6.37 5.58
No. 1 and No. 2 38 x 89 2.09 1.90 1.66 2.09 1.90 1.66 2.09 1.90 1.66
38 x 140 3.29 2.99 2.62 3.29 2.99 2.62 3.29 2.99 2.55
38 x 184 4.06 3.83 3.44 4.33 3.93 3.44 4.33 3.81 3.11
38 x 235 4.78 4.50 4.11 5.24 4.98 4.31 5.37 4.65 3.80
38 x 286 5.44 5.12 4.68 5.93 5.64 5.00 6.24 5.40 4.41
No. 3 38 x 89 1.95 1.69 1.38 1.95 1.69 1.38 1.72 1.49 1.21
38 x 140 2.78 2.41 1.97 2.78 2.41 1.97 2.45 2.12 1.73
38 x 184 3.38 2.93 2.39 3.38 2.93 2.39 2.98 2.58 2.11
38 x 235 4.14 3.58 2.93 4.14 3.58 2.93 3.65 3.16 2.58
38 x 286 4.80 4.16 3.39 4.80 4.16 3.39 4.23 3.66 2.99
Construction 38 x 89 2.03 1.84 1.61 2.03 1.84 1.61 2.03 1.84 1.61
Standard 38 x 89 1.88 1.63 1.33 1.88 1.63 1.33 1.66 1.44 1.17
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 38 x 89 2.16 1.96 1.71 2.16 1.96 1.71 2.16 1.96 1.71
38 x 140 3.39 3.08 2.69 3.39 3.08 2.69 3.39 3.08 2.69
38 x 184 4.18 3.94 3.54 4.46 4.05 3.54 4.46 4.05 3.54
38 x 235 4.92 4.63 4.23 5.39 5.13 4.52 5.69 5.17 4.52
38 x 286 5.60 5.27 4.82 6.10 5.81 5.47 6.74 6.28 5.50
No. 1 and No. 2 38 x 89 2.09 1.90 1.66 2.09 1.90 1.66 2.09 1.90 1.66
38 x 140 3.29 2.99 2.62 3.29 2.99 2.62 3.29 2.99 2.62
38 x 184 4.06 3.83 3.44 4.33 3.93 3.44 4.33 3.93 3.26
38 x 235 4.78 4.50 4.11 5.24 4.98 4.39 5.53 4.88 3.99
38 x 286 5.44 5.12 4.68 5.93 5.64 5.25 6.54 5.66 4.63
No. 3 38 x 89 2.03 1.84 1.61 2.03 1.84 1.61 2.03 1.83 1.50
38 x 140 3.19 2.90 2.43 3.19 2.90 2.43 3.02 2.62 2.14
38 x 184 3.94 3.61 2.95 4.17 3.61 2.95 3.68 3.18 2.60
38 x 235 4.63 4.36 3.61 5.08 4.42 3.61 4.50 3.89 3.18
38 x 286 5.27 4.96 4.19 5.74 5.13 4.19 5.22 4.52 3.69
Construction 38 x 89 2.03 1.84 1.61 2.03 1.84 1.61 2.03 1.84 1.61
Standard 38 x 89 1.96 1.71 1.39 1.96 1.71 1.39 1.74 1.50 1.23
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 38 x 89 2.06 1.87 1.64 2.06 1.87 1.64 2.06 1.87 1.64
38 x 140 3.24 2.95 2.57 3.24 2.95 2.57 3.24 2.95 2.57
38 x 184 4.00 3.77 3.38 4.26 3.87 3.38 4.26 3.87 3.38
38 x 235 4.70 4.43 4.05 5.16 4.91 4.32 5.45 4.95 4.32
38 x 286 5.35 5.04 4.61 5.84 5.55 5.23 6.45 6.01 5.26
No. 1 and No. 2 38 x 89 1.99 1.81 1.58 1.99 1.81 1.58 1.99 1.81 1.58
38 x 140 3.14 2.85 2.49 3.14 2.85 2.49 3.14 2.85 2.49
38 x 184 3.87 3.64 3.27 4.12 3.75 3.27 4.12 3.75 3.27
38 x 235 4.55 4.28 3.91 4.99 4.75 4.18 5.27 4.79 4.13
38 x 286 5.18 4.88 4.46 5.65 5.37 5.06 6.23 5.81 4.79
No. 3 38 x 89 1.96 1.78 1.55 1.96 1.78 1.55 1.96 1.78 1.50
38 x 140 3.08 2.80 2.43 3.08 2.80 2.43 3.02 2.62 2.14
38 x 184 3.80 3.58 2.95 4.05 3.61 2.95 3.68 3.18 2.60
38 x 235 4.47 4.21 3.61 4.90 4.42 3.61 4.50 3.89 3.18
38 x 286 5.09 4.79 4.19 5.55 5.13 4.19 5.22 4.52 3.69
Construction 38 x 89 1.96 1.78 1.55 1.96 1.78 1.55 1.96 1.78 1.55
Standard 38 x 89 1.88 1.71 1.44 1.88 1.71 1.44 1.80 1.56 1.27
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 38 x 89 1.84 1.68 1.46 1.84 1.68 1.46 1.84 1.68 1.46
38 x 140 2.90 2.63 2.30 2.90 2.63 2.30 2.90 2.63 2.30
38 x 184 3.58 3.37 3.03 3.81 3.46 3.03 3.81 3.46 3.03
38 x 235 4.20 3.96 3.62 4.61 4.39 3.86 4.87 4.42 3.86
38 x 286 4.79 4.51 4.12 5.22 4.96 4.68 5.76 5.37 4.54
No. 1 and No. 2 38 x 89 1.80 1.64 1.43 1.80 1.64 1.43 1.80 1.64 1.43
38 x 140 2.83 2.57 2.25 2.83 2.57 2.25 2.83 2.57 2.23
38 x 184 3.50 3.29 2.96 3.72 3.38 2.96 3.72 3.32 2.71
38 x 235 4.11 3.87 3.54 4.51 4.29 3.76 4.69 4.06 3.31
38 x 286 4.68 4.40 4.03 5.10 4.85 4.36 5.44 4.71 3.84
No. 3 38 x 89 1.76 1.60 1.36 1.76 1.60 1.36 1.70 1.47 1.20
38 x 140 2.75 2.38 1.94 2.75 2.38 1.94 2.42 2.10 1.71
38 x 184 3.35 2.90 2.37 3.35 2.90 2.37 2.95 2.55 2.08
38 x 235 4.01 3.54 2.89 4.09 3.54 2.89 3.61 3.12 2.55
38 x 286 4.56 4.11 3.36 4.75 4.11 3.36 4.18 3.62 2.96
Construction 38 x 89 1.76 1.60 1.40 1.76 1.60 1.40 1.76 1.60 1.37
Standard 38 x 89 1.63 1.41 1.15 1.63 1.41 1.15 1.44 1.25 1.02
Notes to Table A-2:
(1) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3.
(2) No bridging is assumed for spans for floor joists with concrete topping.
Table A-3
Maximum Spans for Ceiling Joists – Attic not Accessible by a Stairway
Forming part of Sentence 9.23.4.2.(1)
Commercial Designation Grade Joist Size, mm Maximum Span, m
Joist Spacing, mm
300 400 600
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 38 x 89 3.41 3.10 2.71
38 x 140 5.37 4.88 4.26
38 x 184 7.05 6.41 5.60
38 x 235 9.01 8.18 7.15
38 x 286 10.96 9.96 8.70
No. 1 and No. 2 38 x 89 3.27 2.97 2.59
38 x 140 5.14 4.67 4.08
38 x 184 6.76 6.14 5.36
38 x 235 8.63 7.84 6.85
38 x 286 10.50 9.54 8.34
No. 3 38 x 89 3.17 2.88 2.42
38 x 140 4.89 4.23 3.46
38 x 184 5.95 5.15 4.20
38 x 235 7.27 6.30 5.14
38 x 286 8.44 7.31 5.97
Construction 38 x 89 3.17 2.88 2.51
Standard 38 x 89 3.06 2.78 2.34
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 38 x 89 3.36 3.06 2.67
38 x 140 5.29 4.81 4.20
38 x 184 6.96 6.32 5.52
38 x 235 8.88 8.07 7.05
38 x 286 10.81 9.82 8.58
No. 1 and No. 2 38 x 89 3.27 2.97 2.59
38 x 140 5.14 4.67 4.08
38 x 184 6.76 6.14 5.36
38 x 235 8.63 7.84 6.85
38 x 286 10.50 9.54 8.34
No. 3 38 x 89 3.17 2.88 2.51
38 x 140 4.98 4.53 3.95
38 x 184 6.55 5.95 5.19
38 x 235 8.36 7.60 6.34
38 x 286 10.18 9.01 7.36
Construction 38 x 89 3.17 2.88 2.50
Standard 38 x 89 3.06 2.78 2.43
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 38 x 89 3.22 2.92 2.55
38 x 140 5.06 4.60 4.02
38 x 184 6.65 6.05 5.28
38 x 235 8.50 7.72 6.74
38 x 286 10.34 9.40 8.21
No. 1 and No. 2 38 x 89 3.11 2.83 2.47
38 x 140 4.90 4.45 3.89
38 x 184 6.44 5.85 5.11
38 x 235 8.22 7.47 6.52
38 x 286 10.00 9.09 7.94
No. 3 38 x 89 3.06 2.78 2.43
38 x 140 4.81 4.37 3.82
38 x 184 6.32 5.74 5.02
38 x 235 8.07 7.33 6.34
38 x 286 9.82 8.93 7.36
Construction 38 x 89 3.06 2.78 2.43
Standard 38 x 89 2.94 2.67 2.33
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 38 x 89 2.88 2.61 2.28
38 x 140 4.53 4.11 3.59
38 x 184 5.95 5.40 4.72
38 x 235 7.60 6.90 6.03
38 x 286 9.25 8.40 7.34
No. 1 and No. 2 38 x 89 2.81 2.55 2.23
38 x 140 4.42 4.02 3.51
38 x 184 5.81 5.28 4.61
38 x 235 7.42 6.74 5.89
38 x 286 9.03 8.21 7.17
No. 3 38 x 89 2.74 2.49 2.18
38 x 140 4.31 3.92 3.42
38 x 184 5.67 5.09 4.16
38 x 235 7.19 6.23 5.08
38 x 286 8.34 7.23 5.90
Construction 38 x 89 2.74 2.49 2.18
Standard 38 x 89 2.67 2.43 2.03
Table A-4
Maximum Spans for Roof Joists – Specified Roof Snow Loads 1.0 to 2.0 kPa
Forming part of Sentence 9.23.4.2.(1)
Commercial Designation Grade Joist Size, mm Maximum Span, m
Specified Snow Load, kPa
1.0 1.5 2.0
Joist Spacing, mm Joist Spacing, mm Joist Spacing, mm
300 400 600 300 400 600 300 400 600
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 38 x 89 2.71 2.46 2.15 2.37 2.15 1.88 2.15 1.95 1.71
38 x 140 4.26 3.87 3.38 3.72 3.38 2.95 3.38 3.07 2.68
38 x 184 5.60 5.09 4.44 4.89 4.44 3.88 4.44 4.04 3.53
38 x 235 7.15 6.49 5.67 6.24 5.67 4.96 5.67 5.15 4.50
38 x 286 8.70 7.90 6.91 7.60 6.91 6.03 6.91 6.27 5.48
No. 1 and No. 2 38 x 89 2.59 2.36 2.06 2.27 2.06 1.80 2.06 1.87 1.63
38 x 140 4.08 3.71 3.24 3.57 3.24 2.83 3.24 2.94 2.57
38 x 184 5.36 4.87 4.26 4.69 4.26 3.72 4.26 3.87 3.38
38 x 235 6.85 6.22 5.44 5.98 5.44 4.74 5.44 4.94 4.22
38 x 286 8.34 7.57 6.40 7.28 6.62 5.50 6.62 6.00 4.90
No. 3 38 x 89 2.49 2.16 1.76 2.14 1.85 1.51 1.91 1.65 1.35
38 x 140 3.56 3.08 2.51 3.06 2.65 2.16 2.72 2.36 1.92
38 x 184 4.33 3.75 3.06 3.72 3.22 2.63 3.31 2.87 2.34
38 x 235 5.29 4.58 3.74 4.55 3.94 3.22 4.05 3.51 2.86
38 x 286 6.14 5.32 4.34 5.28 4.57 3.73 4.70 4.07 3.32
Construction 38 x 89 2.51 2.28 1.99 2.20 1.99 1.74 1.99 1.81 1.58
Standard 38 x 89 2.41 2.08 1.70 2.07 1.79 1.46 1.84 1.60 1.30
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 38 x 89 2.67 2.43 2.12 2.33 2.12 1.85 2.12 1.93 1.68
38 x 140 4.20 3.82 3.33 3.67 3.33 2.91 3.33 3.03 2.65
38 x 184 5.52 5.02 4.38 4.82 4.38 3.83 4.38 3.98 3.48
38 x 235 7.05 6.41 5.60 6.16 5.60 4.89 5.60 5.09 4.44
38 x 286 8.58 7.80 6.81 7.50 6.81 5.95 6.81 6.19 5.41
No. 1 and No. 2 38 x 89 2.59 2.36 2.06 2.27 2.06 1.80 2.06 1.87 1.63
38 x 140 4.08 3.71 3.24 3.57 3.24 2.83 3.24 2.94 2.57
38 x 184 5.36 4.87 4.26 4.69 4.26 3.72 4.26 3.87 3.38
38 x 235 6.85 6.22 5.44 5.98 5.44 4.75 5.44 4.94 4.32
38 x 286 8.34 7.57 6.62 7.28 6.62 5.77 6.62 6.01 5.25
No. 3 38 x 89 2.51 2.28 1.99 2.20 1.99 1.74 1.99 1.81 1.58
38 x 140 3.95 3.59 3.10 3.45 3.14 2.67 3.14 2.85 2.37
38 x 184 5.20 4.62 3.77 4.54 3.97 3.24 4.09 3.54 2.89
38 x 235 6.53 5.65 4.61 5.61 4.86 3.97 5.00 4.33 3.53
38 x 286 7.57 6.56 5.35 6.51 5.64 4.60 5.80 5.02 4.10
Construction 38 x 89 2.51 2.28 1.99 2.20 1.99 1.74 1.99 1.81 1.58
Standard 38 x 89 2.43 2.18 1.78 2.12 1.88 1.53 1.93 1.67 1.36
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 38 x 89 2.55 2.32 2.03 2.23 2.03 1.77 2.03 1.84 1.61
38 x 140 4.02 3.65 3.19 3.51 3.19 2.79 3.19 2.90 2.53
38 x 184 5.28 4.80 4.19 4.61 4.19 3.66 4.19 3.81 3.33
38 x 235 6.74 6.13 5.35 5.89 5.35 4.68 5.35 4.86 4.25
38 x 286 8.21 7.46 6.52 7.17 6.52 5.69 6.52 5.92 5.17
No. 1 and No. 2 38 x 89 2.47 2.24 1.96 2.16 1.96 1.71 1.96 1.78 1.56
38 x 140 3.89 3.53 3.08 3.40 3.08 2.69 3.08 2.80 2.45
38 x 184 5.11 4.64 4.05 4.46 4.05 3.54 4.05 3.68 3.22
38 x 235 6.52 5.93 5.18 5.70 5.18 4.52 5.18 4.70 4.11
38 x 286 7.94 7.21 6.30 6.94 6.30 5.50 6.30 5.73 5.00
No. 3 38 x 89 2.43 2.20 1.93 2.12 1.93 1.68 1.93 1.75 1.53
38 x 140 3.82 3.47 3.03 3.33 3.03 2.65 3.03 2.75 2.37
38 x 184 5.02 4.56 3.77 4.38 3.97 3.24 3.98 3.54 2.89
38 x 235 6.41 5.65 4.61 5.60 4.86 3.97 5.00 4.33 3.53
38 x 286 7.57 6.56 5.35 6.51 5.64 4.60 5.80 5.02 4.10
Construction 38 x 89 2.43 2.20 1.93 2.12 1.93 1.68 1.93 1.75 1.53
Standard 38 x 89 2.33 2.12 1.85 2.04 1.85 1.59 1.85 1.68 1.41
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 38 x 89 2.28 2.07 1.81 1.99 1.81 1.58 1.81 1.65 1.44
38 x 140 3.59 3.26 2.85 3.14 2.85 2.49 2.85 2.59 2.26
38 x 184 4.72 4.29 3.75 4.12 3.75 3.27 3.75 3.40 2.97
38 x 235 6.03 5.48 4.79 5.27 4.79 4.18 4.79 4.35 3.80
38 x 286 7.34 6.67 5.82 6.41 5.82 5.09 5.82 5.29 4.62
No. 1 and No. 2 38 x 89 2.23 2.03 1.77 1.95 1.77 1.55 1.77 1.61 1.41
38 x 140 3.51 3.19 2.79 3.07 2.79 2.43 2.79 2.53 2.21
38 x 184 4.61 4.19 3.66 4.03 3.66 3.20 3.66 3.33 2.91
38 x 235 5.89 5.35 4.68 5.15 4.68 4.09 4.68 4.25 3.68
38 x 286 7.17 6.52 5.58 6.26 5.69 4.80 5.69 5.17 4.27
No. 3 38 x 89 2.18 1.98 1.73 1.90 1.73 1.50 1.73 1.57 1.33
38 x 140 3.42 3.05 2.49 2.99 2.62 2.14 2.69 2.33 1.90
38 x 184 4.28 3.71 3.03 3.68 3.19 2.60 3.28 2.84 2.32
38 x 235 5.23 4.53 3.70 4.50 3.90 3.18 4.01 3.47 2.83
38 x 286 6.07 5.26 4.29 5.22 4.52 3.69 4.65 4.03 3.29
Construction 38 x 89 2.18 1.98 1.73 1.90 1.73 1.51 1.73 1.57 1.37
Standard 38 x 89 2.09 1.81 1.48 1.80 1.56 1.27 1.60 1.38 1.13
Table A-5
Maximum Spans for Roof Joists – Specified Roof Snow Loads 2.5 and 3.0 kPa
Forming part of Sentence 9.23.4.2.(1)
Commercial Designation Grade Joist Size, mm Maximum Span, m
Specified Snow Load, kPa
2.5 3.0
Joist Spacing, mm Joist Spacing, mm
300 400 600 300 400 600
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 38 x 89 1.99 1.81 1.58 1.88 1.71 1.49
38 x 140 3.14 2.85 2.49 2.95 2.68 2.34
38 x 184 4.12 3.75 3.27 3.88 3.53 3.08
38 x 235 5.27 4.79 4.18 4.96 4.50 3.93
38 x 286 6.41 5.82 5.09 6.03 5.48 4.79
No. 1 and No. 2 38 x 89 1.91 1.74 1.52 1.80 1.63 1.43
38 x 140 3.01 2.73 2.39 2.83 2.57 2.25
38 x 184 3.95 3.59 3.14 3.72 3.38 2.90
38 x 235 5.05 4.59 3.84 4.75 4.32 3.55
38 x 286 6.14 5.46 4.46 5.78 5.05 4.12
No. 3 38 x 89 1.74 1.50 1.23 1.60 1.39 1.13
38 x 140 2.48 2.15 1.75 2.29 1.98 1.62
38 x 184 3.01 2.61 2.13 2.79 2.41 1.97
38 x 235 3.69 3.19 2.61 3.41 2.95 2.41
38 x 286 4.28 3.70 3.03 3.95 3.42 2.79
Construction 38 x 89 1.85 1.68 1.47 1.74 1.58 1.38
Standard 38 x 89 1.68 1.45 1.19 1.55 1.34 1.10
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 38 x 89 1.97 1.79 1.56 1.85 1.68 1.47
38 x 140 3.10 2.81 2.46 2.91 2.65 2.31
38 x 184 4.07 3.70 3.23 3.83 3.48 3.04
38 x 235 5.20 4.72 4.12 4.89 4.44 3.88
38 x 286 6.32 5.75 5.02 5.95 5.41 4.72
No. 1 and No. 2 38 x 89 1.91 1.74 1.52 1.80 1.63 1.43
38 x 140 3.01 2.73 2.39 2.83 2.57 2.25
38 x 184 3.95 3.59 3.14 3.72 3.38 2.95
38 x 235 5.05 4.59 4.01 4.75 4.32 3.72
38 x 286 6.14 5.58 4.68 5.78 5.25 4.32
No. 3 38 x 89 1.85 1.68 1.47 1.74 1.58 1.38
38 x 140 2.91 2.65 2.16 2.74 2.45 2.00
38 x 184 3.72 3.22 2.63 3.44 2.98 2.43
38 x 235 4.55 3.94 3.22 4.20 3.64 2.97
38 x 286 5.28 4.57 3.73 4.88 4.22 3.45
Construction 38 x 89 1.85 1.68 1.47 1.74 1.58 1.38
Standard 38 x 89 1.76 1.52 1.24 1.62 1.40 1.15
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 38 x 89 1.88 1.71 1.49 1.77 1.61 1.41
38 x 140 2.96 2.69 2.35 2.79 2.53 2.21
38 x 184 3.89 3.54 3.09 3.66 3.33 2.91
38 x 235 4.97 4.52 3.94 4.68 4.25 3.71
38 x 286 6.05 5.50 4.80 5.69 5.17 4.52
No. 1 and No. 2 38 x 89 1.82 1.65 1.44 1.71 1.56 1.36
38 x 140 2.86 2.60 2.27 2.69 2.45 2.14
38 x 184 3.76 3.42 2.99 3.54 3.22 2.81
38 x 235 4.81 4.37 3.82 4.52 4.11 3.59
38 x 286 5.85 5.31 4.64 5.50 5.00 4.37
No. 3 38 x 89 1.79 1.62 1.42 1.68 1.53 1.34
38 x 140 2.81 2.56 2.16 2.65 2.40 2.00
38 x 184 3.70 3.22 2.63 3.44 2.98 2.43
38 x 235 4.55 3.94 3.22 4.20 3.64 2.97
38 x 286 5.28 4.57 3.73 4.88 4.22 3.45
Construction 38 x 89 1.79 1.62 1.42 1.68 1.53 1.34
Standard 38 x 89 1.72 1.56 1.29 1.62 1.46 1.19
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 38 x 89 1.68 1.53 1.34 1.58 1.44 1.26
38 x 140 2.65 2.40 2.10 2.49 2.26 1.98
38 x 184 3.48 3.16 2.76 3.27 2.97 2.60
38 x 235 4.44 4.04 3.53 4.18 3.80 3.32
38 x 286 5.41 4.91 4.29 5.09 4.62 4.04
No. 1 and No. 2 38 x 89 1.64 1.49 1.31 1.55 1.41 1.23
38 x 140 2.59 2.35 2.05 2.43 2.21 1.93
38 x 184 3.40 3.09 2.70 3.20 2.91 2.53
38 x 235 4.34 3.94 3.35 4.09 3.71 3.10
38 x 286 5.28 4.76 3.89 4.97 4.40 3.59
No. 3 38 x 89 1.60 1.46 1.21 1.51 1.37 1.12
38 x 140 2.45 2.12 1.73 2.26 1.96 1.60
38 x 184 2.98 2.58 2.11 2.76 2.39 1.95
38 x 235 3.65 3.16 2.58 3.37 2.92 2.38
38 x 286 4.23 3.66 2.99 3.91 3.39 2.76
Construction 38 x 89 1.60 1.46 1.27 1.51 1.37 1.20
Standard 38 x 89 1.46 1.26 1.03 1.34 1.16 0.95
Table A-6
Maximum Spans for Roof Rafters – Specified Roof Snow Loads 1.0 to 2.0 kPa
Forming part of Sentence 9.23.4.2.(1)
Commercial Designation Grade Rafter Size, mm Maximum Span, m
Specified Snow Load, kPa
1.0 1.5 2.0
Rafter Spacing, mm Rafter Spacing, mm Rafter Spacing, mm
300 400 600 300 400 600 300 400 600
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 38 x 89 3.41 3.10 2.71 2.98 2.71 2.37 2.71 2.46 2.15
38 x 140 5.37 4.88 4.26 4.69 4.26 3.72 4.26 3.87 3.38
38 x 184 7.05 6.41 5.60 6.16 5.60 4.89 5.60 5.09 4.44
38 x 235 9.01 8.18 7.15 7.87 7.15 6.24 7.15 6.49 5.62
38 x 286 10.96 9.96 8.70 9.58 8.70 7.40 8.70 7.90 6.52
No. 1 and
No. 2 		38 x 89 3.27 2.97 2.59 2.86 2.59 2.27 2.59 2.36 2.06
38 x 140 5.14 4.67 3.95 4.49 4.08 3.34 4.08 3.60 2.94
38 x 184 6.76 5.88 4.80 5.74 4.97 4.06 5.06 4.38 3.58
38 x 235 8.30 7.19 5.87 7.02 6.08 4.96 6.19 5.36 4.38
38 x 286 9.63 8.34 6.81 8.14 7.05 5.76 7.18 6.22 5.08
No. 3 38 x 89 2.65 2.30 1.87 2.24 1.94 1.58 1.98 1.71 1.40
38 x 140 3.78 3.28 2.68 3.20 2.77 2.26 2.82 2.44 1.99
38 x 184 4.61 3.99 3.26 3.89 3.37 2.75 3.43 2.97 2.43
38 x 235 5.63 4.88 3.98 4.76 4.12 3.37 4.20 3.64 2.97
38 x 286 6.53 5.66 4.62 5.52 4.78 3.91 4.87 4.22 3.44
Construction 38 x 89 3.17 2.88 2.42 2.77 2.50 2.04 2.51 2.21 1.80
Standard 38 x 89 2.56 2.22 1.81 2.17 1.88 1.53 1.91 1.65 1.35
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 38 x 89 3.36 3.06 2.67 2.94 2.67 2.33 2.67 2.43 2.12
38 x 140 5.29 4.81 4.20 4.62 4.20 3.67 4.20 3.82 3.33
38 x 184 6.96 6.32 5.52 6.08 5.52 4.82 5.52 5.02 4.38
38 x 235 8.88 8.07 7.05 7.76 7.05 6.16 7.05 6.41 5.54
38 x 286 10.81 9.82 8.58 9.45 8.58 7.28 8.58 7.80 6.42
No. 1 and
No. 2 		38 x 89 3.27 2.97 2.59 2.86 2.59 2.27 2.59 2.36 2.06
38 x 140 5.14 4.67 4.08 4.49 4.08 3.50 4.08 3.71 3.08
38 x 184 6.76 6.14 5.04 5.90 5.21 4.26 5.31 4.60 3.75
38 x 235 8.63 7.54 6.16 7.36 6.37 5.20 6.49 5.62 4.59
38 x 286 10.11 8.75 7.15 8.54 7.40 6.04 7.53 6.52 5.33
No. 3 38 x 89 3.17 2.83 2.31 2.76 2.39 1.95 2.44 2.11 1.72
38 x 140 4.67 4.04 3.30 3.95 3.42 2.79 3.48 3.01 2.46
38 x 184 5.68 4.92 4.02 4.80 4.16 3.40 4.23 3.67 2.99
38 x 235 6.95 6.02 4.91 5.87 5.08 4.15 5.18 4.48 3.66
38 x 286 8.06 6.98 5.70 6.81 5.90 4.82 6.01 5.20 4.25
Construction 38 x 89 3.17 2.88 2.51 2.77 2.51 2.14 2.51 2.28 1.89
Standard 38 x 89 2.68 2.32 1.90 2.27 1.96 1.60 2.00 1.73 1.41
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 38 x 89 3.22 2.92 2.55 2.81 2.55 2.23 2.55 2.32 2.03
38 x 140 5.06 4.60 4.02 4.42 4.02 3.51 4.02 3.65 3.19
38 x 184 6.65 6.05 5.28 5.81 5.28 4.61 5.28 4.80 4.19
38 x 235 8.50 7.72 6.74 7.42 6.74 5.89 6.74 6.13 5.35
38 x 286 10.34 9.40 8.21 9.03 8.21 7.17 8.21 7.46 6.52
No. 1 and
No. 2 		38 x 89 3.11 2.83 2.47 2.72 2.47 2.16 2.47 2.24 1.96
38 x 140 4.90 4.45 3.89 4.28 3.89 3.40 3.89 3.53 3.08
38 x 184 6.44 5.85 5.11 5.62 5.11 4.41 5.11 4.64 3.89
38 x 235 8.22 7.47 6.38 7.18 6.52 5.39 6.52 5.82 4.75
38 x 286 10.00 9.06 7.40 8.74 7.66 6.25 7.80 6.76 5.52
No. 3 38 x 89 3.06 2.78 2.31 2.67 2.39 1.95 2.43 2.11 1.72
38 x 140 4.67 4.04 3.30 3.95 3.42 2.79 3.48 3.01 2.46
38 x 184 5.68 4.92 4.02 4.80 4.16 3.40 4.23 3.67 2.99
38 x 235 6.95 6.02 4.91 5.87 5.08 4.15 5.18 4.48 3.66
38 x 286 8.06 6.98 5.70 6.81 5.90 4.82 6.01 5.20 4.25
Construction 38 x 89 3.06 2.78 2.43 2.67 2.43 2.12 2.43 2.20 1.93
Standard 38 x 89 2.78 2.41 1.97 2.35 2.04 1.66 2.07 1.79 1.47
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 38 x 89 2.88 2.61 2.28 2.51 2.28 1.99 2.28 2.07 1.81
38 x 140 4.53 4.11 3.59 3.95 3.59 3.14 3.59 3.26 2.85
38 x 184 5.95 5.40 4.72 5.20 4.72 4.12 4.72 4.29 3.68
38 x 235 7.60 6.90 6.03 6.64 6.03 5.11 6.03 5.48 4.51
38 x 286 9.25 8.40 7.01 8.08 7.26 5.93 7.34 6.40 5.23
No. 1 and
No. 2 		38 x 89 2.81 2.55 2.23 2.46 2.23 1.95 2.23 2.03 1.77
38 x 140 4.42 4.02 3.44 3.86 3.51 2.91 3.51 3.14 2.56
38 x 184 5.81 5.13 4.19 5.00 4.33 3.54 4.41 3.82 3.12
38 x 235 7.24 6.27 5.12 6.12 5.30 4.33 5.40 4.67 3.82
38 x 286 8.40 7.27 5.94 7.10 6.15 5.02 6.26 5.42 4.43
No. 3 38 x 89 2.62 2.27 1.85 2.22 1.92 1.57 1.95 1.69 1.38
38 x 140 3.74 3.24 2.65 3.16 2.74 2.24 2.79 2.42 1.97
38 x 184 4.56 3.94 3.22 3.85 3.33 2.72 3.40 2.94 2.40
38 x 235 5.57 4.82 3.94 4.71 4.08 3.33 4.15 3.60 2.94
38 x 286 6.46 5.60 4.57 5.46 4.73 3.86 4.82 4.17 3.41
Construction 38 x 89 2.74 2.49 2.11 2.40 2.18 1.90 2.18 1.93 1.57
Standard 38 x 89 2.22 1.93 1.57 1.88 1.63 1.33 1.66 1.44 1.17
Table A-7
Maximum Spans for Roof Rafters – Specified Roof Snow Loads 2.5 and 3.0 kPa
Forming part of Sentence 9.23.4.2.(1)
Commercial Designation Grade Rafter Size, mm Maximum Span, m
Specified Snow Load, kPa
2.5 3.0
Rafter Spacing, mm Rafter Spacing, mm
300 400 600 300 400 600
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 38 x 89 2.51 2.28 1.99 2.37 2.15 1.88
38 x 140 3.95 3.59 3.14 3.72 3.38 2.95
38 x 184 5.20 4.72 4.12 4.89 4.44 3.83
38 x 235 6.64 6.03 5.08 6.24 5.67 4.68
38 x 286 8.08 7.23 5.90 7.60 6.65 5.43
No. 1 and
No. 2 		38 x 89 2.41 2.19 1.86 2.27 2.06 1.71
38 x 140 3.76 3.26 2.66 3.46 3.00 2.45
38 x 184 4.58 3.96 3.24 4.21 3.65 2.98
38 x 235 5.60 4.85 3.96 5.15 4.46 3.64
38 x 286 6.50 5.63 4.59 5.98 5.17 4.23
No. 3 38 x 89 1.79 1.55 1.26 1.64 1.42 1.16
38 x 140 2.55 2.21 1.80 2.35 2.03 1.66
38 x 184 3.10 2.69 2.20 2.86 2.47 2.02
38 x 235 3.80 3.29 2.68 3.49 3.02 2.47
38 x 286 4.41 3.82 3.12 4.05 3.51 2.87
Construction 38 x 89 2.30 2.00 1.63 2.12 1.84 1.50
Standard 38 x 89 1.73 1.50 1.22 1.59 1.38 1.12
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 38 x 89 2.48 2.25 1.97 2.33 2.12 1.85
38 x 140 3.90 3.54 3.10 3.67 3.33 2.91
38 x 184 5.13 4.66 4.07 4.82 4.38 3.77
38 x 235 6.55 5.95 5.01 6.16 5.60 4.61
38 x 286 7.97 7.12 5.81 7.50 6.55 5.34
No. 1 and
No. 2 		38 x 89 2.41 2.19 1.91 2.27 2.06 1.80
38 x 140 3.79 3.42 2.79 3.57 3.14 2.57
38 x 184 4.80 4.16 3.40 4.42 3.83 3.12
38 x 235 5.87 5.08 4.15 5.40 4.68 3.82
38 x 286 6.81 5.90 4.82 6.27 5.43 4.43
No. 3 38 x 89 2.21 1.91 1.56 2.03 1.76 1.43
38 x 140 3.15 2.73 2.23 2.90 2.51 2.05
38 x 184 3.83 3.32 2.71 3.52 3.05 2.49
38 x 235 4.68 4.06 3.31 4.31 3.73 3.05
38 x 286 5.43 4.71 3.84 5.00 4.33 3.54
Construction 38 x 89 2.33 2.09 1.71 2.20 1.93 1.57
Standard 38 x 89 1.81 1.57 1.28 1.66 1.44 1.18
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 38 x 89 2.37 2.15 1.88 2.23 2.03 1.77
38 x 140 3.73 3.39 2.96 3.51 3.19 2.79
38 x 184 4.90 4.45 3.89 4.61 4.19 3.66
38 x 235 6.26 5.69 4.97 5.89 5.35 4.68
38 x 286 7.62 6.92 5.90 7.17 6.52 5.43
No. 1 and
No. 2 		38 x 89 2.29 2.08 1.82 2.16 1.96 1.71
38 x 140 3.61 3.28 2.86 3.40 3.08 2.66
38 x 184 4.74 4.31 3.52 4.46 3.96 3.23
38 x 235 6.06 5.27 4.30 5.59 4.84 3.96
38 x 286 7.06 6.11 4.99 6.49 5.62 4.59
No. 3 38 x 89 2.21 1.91 1.56 2.03 1.76 1.43
38 x 140 3.15 2.73 2.23 2.90 2.51 2.05
38 x 184 3.83 3.32 2.71 3.52 3.05 2.49
38 x 235 4.68 4.06 3.31 4.31 3.73 3.05
38 x 286 5.43 4.71 3.84 5.00 4.33 3.54
Construction 38 x 89 2.25 2.05 1.77 2.12 1.93 1.63
Standard 38 x 89 1.87 1.62 1.33 1.72 1.49 1.22
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 38 x 89 2.12 1.93 1.68 1.99 1.81 1.58
38 x 140 3.33 3.03 2.65 3.14 2.85 2.49
38 x 184 4.38 3.98 3.33 4.12 3.75 3.07
38 x 235 5.60 4.99 4.08 5.27 4.59 3.75
38 x 286 6.69 5.79 4.73 6.15 5.33 4.35
No. 1 and
No. 2 		38 x 89 2.07 1.88 1.62 1.95 1.77 1.49
38 x 140 3.26 2.84 2.32 3.02 2.61 2.13
38 x 184 3.99 3.46 2.82 3.67 3.18 2.60
38 x 235 4.88 4.23 3.45 4.49 3.89 3.17
38 x 286 5.66 4.90 4.00 5.21 4.51 3.68
No. 3 38 x 89 1.77 1.53 1.25 1.63 1.41 1.15
38 x 140 2.52 2.19 1.78 2.32 2.01 1.64
38 x 184 3.07 2.66 2.17 2.82 2.45 2.00
38 x 235 3.76 3.25 2.66 3.45 2.99 2.44
38 x 286 4.36 3.77 3.08 4.01 3.47 2.83
Construction 38 x 89 2.01 1.74 1.42 1.85 1.60 1.31
Standard 38 x 89 1.50 1.30 1.06 1.38 1.19 0.98
Table A-8
Maximum Spans for Built-up Floor Beams Supporting not more than One Floor(1)(2)
Forming part of Sentence 9.23.4.2.(3)
Commercial Designation Grade

Supported Length, m(3)(4)

Maximum Span, m(5)(6)
Size of Built-up Beam, mm
3- 38x184 4- 38x184 5- 38x184 3- 38x235 4- 38x235 5- 38x235 3- 38x286 4- 38x286 5- 38x286
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 2.4 3.36 3.70 3.99 4.30 4.73 5.09 5.23 5.66 5.99
3.0 3.12 3.44 3.70 3.99 4.39 4.73 4.84 5.34 5.66
3.6 2.94 3.23 3.48 3.75 4.13 4.45 4.41 5.03 5.41
4.2 2.79 3.07 3.31 3.52 3.92 4.23 4.09 4.72 5.14
4.8 2.67 2.94 3.17 3.29 3.75 4.04 3.82 4.41 4.92
5.4 2.54 2.83 3.04 3.11 3.59 3.89 3.60 4.16 4.65
6.0 2.41 2.73 2.94 2.95 3.40 3.75 3.42 3.95 4.41
No. 1 and No. 2 2.4 2.97 3.42 3.82 3.63 4.19 4.68 4.21 4.86 5.43
3.0 2.65 3.06 3.42 3.24 3.75 4.19 3.76 4.35 4.86
3.6 2.42 2.80 3.13 2.96 3.42 3.82 3.44 3.97 4.44
4.2 2.24 2.59 2.89 2.74 3.17 3.54 3.18 3.67 4.11
4.8 2.10 2.42 2.71 2.56 2.96 3.31 2.98 3.44 3.84
5.4 1.98 2.28 2.55 2.42 2.79 3.12 2.81 3.24 3.62
6.0 1.88 2.17 2.42 2.29 2.65 2.96 2.66 3.07 3.44
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 2.4 3.32 3.65 3.93 4.24 4.66 5.03 5.16 5.61 5.93
3.0 3.08 3.39 3.65 3.93 4.33 4.66 4.76 5.27 5.61
3.6 2.90 3.19 3.44 3.70 4.08 4.39 4.35 4.96 5.34
4.2 2.75 3.03 3.27 3.47 3.87 4.17 4.02 4.65 5.07
4.8 2.63 2.90 3.12 3.24 3.70 3.99 3.66 4.35 4.85
5.4 2.49 2.79 3.00 2.95 3.53 3.83 3.32 4.10 4.58
6.0 2.28 2.69 2.90 2.70 3.35 3.70 3.04 3.87 4.35
No. 1 and No. 2 2.4 3.11 3.55 3.82 3.80 4.39 4.88 4.41 5.10 5.70
3.0 2.78 3.21 3.55 3.40 3.93 4.39 3.95 4.56 5.10
3.6 2.54 2.93 3.28 3.11 3.59 4.01 3.60 4.16 4.65
4.2 2.35 2.72 3.04 2.88 3.32 3.71 3.34 3.85 4.31
4.8 2.20 2.54 2.84 2.69 3.11 3.47 3.12 3.60 4.03
5.4 2.07 2.39 2.68 2.54 2.93 3.27 2.94 3.40 3.80
6.0 1.97 2.27 2.54 2.41 2.78 3.11 2.79 3.22 3.60
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 2.4 3.17 3.49 3.76 4.05 4.46 4.81 4.93 5.42 5.73
3.0 2.95 3.24 3.49 3.76 4.14 4.46 4.58 5.04 5.42
3.6 2.77 3.05 3.29 3.54 3.90 4.20 4.31 4.74 5.11
4.2 2.63 2.90 3.12 3.36 3.70 3.99 4.09 4.51 4.85
4.8 2.52 2.77 2.99 3.22 3.54 3.81 3.82 4.31 4.64
5.4 2.42 2.67 2.87 3.09 3.41 3.67 3.60 4.14 4.46
6.0 2.34 2.57 2.77 2.95 3.29 3.54 3.32 3.95 4.31
No. 1 and No. 2 2.4 3.07 3.38 3.64 3.92 4.32 4.65 4.57 5.25 5.59
3.0 2.85 3.14 3.38 3.52 4.01 4.32 4.09 4.72 5.25
3.6 2.63 2.95 3.18 3.22 3.71 4.06 3.73 4.31 4.82
4.2 2.44 2.80 3.02 2.98 3.44 3.84 3.46 3.99 4.46
4.8 2.28 2.63 2.89 2.79 3.22 3.60 3.23 3.73 4.17
5.4 2.15 2.48 2.77 2.63 3.03 3.39 3.05 3.52 3.93
6.0 2.04 2.35 2.63 2.49 2.88 3.22 2.89 3.34 3.73
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 2.4 2.84 3.12 3.36 3.62 3.99 4.30 4.33 4.85 5.23
3.0 2.63 2.90 3.12 3.34 3.70 3.99 3.88 4.47 4.85
3.6 2.48 2.73 2.94 3.05 3.48 3.75 3.54 4.08 4.57
4.2 2.31 2.59 2.79 2.82 3.26 3.57 3.28 3.78 4.23
4.8 2.16 2.48 2.67 2.64 3.05 3.41 3.06 3.54 3.96
5.4 2.04 2.35 2.57 2.49 2.87 3.21 2.89 3.34 3.73
6.0 1.93 2.23 2.48 2.36 2.73 3.05 2.74 3.16 3.54
No. 1 and No. 2 2.4 2.59 2.99 3.29 3.16 3.65 4.08 3.67 4.24 4.74
3.0 2.31 2.67 2.99 2.83 3.27 3.65 3.28 3.79 4.24
3.6 2.11 2.44 2.73 2.58 2.98 3.33 3.00 3.46 3.87
4.2 1.95 2.26 2.52 2.39 2.76 3.09 2.77 3.20 3.58
4.8 1.83 2.11 2.36 2.24 2.58 2.89 2.59 3.00 3.35
5.4 1.72 1.99 2.23 2.11 2.43 2.72 2.45 2.82 3.16
6.0 1.64 1.89 2.11 2.00 2.31 2.58 2.32 2.68 3.00
Notes to Table A-8:
(1) Beam spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3.
(2) When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8.
(3) Supported length means half the sum of the joist spans on both sides of the beam.
(4) Straight interpolation may be used for other supported lengths.
(5) Spans are clear spans between supports. For total span, add two bearing lengths.
(6) 3-ply beams with supported lengths greater than 4.2 m require 114 mm bearing. All other beams require 76 mm bearing.
Table A-9
Maximum Spans for Built-up Floor Beams Supporting not more than Two Floors(1)(2)
Forming part of Sentence 9.23.4.2.(3)
Commercial Designation Grade

Supported Length, m(3)(4)

Maximum Span, m(5)(6)
Size of Built-up Beam, mm
3- 38x184 4- 38x184 5- 38x184 3- 38x235 4- 38x235 5- 38x235 3- 38x286 4- 38x286 5- 38x286
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 2.4 2.80 3.08 3.32 3.49 3.93 4.24 4.05 4.67 5.16
3.0 2.55 2.86 3.08 3.12 3.60 3.93 3.62 4.18 4.67
3.6 2.33 2.69 2.90 2.85 3.29 3.68 3.30 3.82 4.27
4.2 2.16 2.49 2.75 2.64 3.04 3.40 2.99 3.53 3.95
4.8 2.00 2.33 2.60 2.38 2.85 3.18 2.69 3.30 3.69
5.4 1.82 2.20 2.45 2.17 2.68 3.00 2.45 3.08 3.48
6.0 1.67 2.08 2.33 2.00 2.51 2.85 2.26 2.83 3.30
No. 1 and No. 2 2.4 2.22 2.56 2.87 2.72 3.14 3.51 3.15 3.64 4.07
3.0 1.99 2.29 2.56 2.43 2.80 3.14 2.82 3.25 3.64
3.6 1.81 2.09 2.34 2.22 2.56 2.86 2.57 2.97 3.32
4.2 1.68 1.94 2.17 2.05 2.37 2.65 2.38 2.75 3.07
4.8 1.57 1.81 2.03 1.92 2.22 2.48 2.23 2.57 2.88
5.4 1.48 1.71 1.91 1.81 2.09 2.34 2.10 2.43 2.71
6.0 1.40 1.62 1.81 1.72 1.98 2.22 1.99 2.30 2.57
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 2.4 2.76 3.04 3.27 3.43 3.88 4.18 3.99 4.60 5.09
3.0 2.51 2.82 3.04 2.97 3.55 3.88 3.34 4.12 4.60
3.6 2.15 2.65 2.86 2.56 3.24 3.62 2.88 3.65 4.20
4.2 1.90 2.40 2.72 2.26 2.85 3.35 2.55 3.21 3.87
4.8 1.70 2.15 2.56 2.03 2.56 3.08 2.30 2.88 3.46
5.4 1.56 1.95 2.35 1.86 2.32 2.79 2.11 2.62 3.14
6.0 1.44 1.79 2.15 1.72 2.14 2.56 1.96 2.42 2.88
No. 1 and No. 2 2.4 2.33 2.69 3.01 2.85 3.29 3.68 3.30 3.82 4.27
3.0 2.08 2.41 2.69 2.55 2.94 3.29 2.96 3.41 3.82
3.6 1.90 2.20 2.45 2.33 2.68 3.00 2.70 3.12 3.48
4.2 1.76 2.03 2.27 2.15 2.49 2.78 2.50 2.88 3.22
4.8 1.65 1.90 2.13 2.01 2.33 2.60 2.30 2.70 3.02
5.4 1.55 1.79 2.00 1.86 2.19 2.45 2.11 2.54 2.84
6.0 1.44 1.70 1.90 1.72 2.08 2.33 1.96 2.41 2.70
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 2.4 2.64 2.91 3.13 3.37 3.71 4.00 4.05 4.52 4.87
3.0 2.45 2.70 2.91 3.12 3.45 3.71 3.62 4.18 4.52
3.6 2.31 2.54 2.73 2.79 3.24 3.49 3.14 3.82 4.25
4.2 2.07 2.41 2.60 2.46 3.04 3.32 2.77 3.50 3.95
4.8 1.85 2.31 2.48 2.21 2.79 3.17 2.50 3.14 3.69
5.4 1.69 2.13 2.39 2.02 2.53 3.00 2.28 2.85 3.42
6.0 1.56 1.95 2.31 1.86 2.32 2.79 2.11 2.62 3.14
No. 1 and No. 2 2.4 2.41 2.79 3.03 2.95 3.41 3.81 3.42 3.95 4.42
3.0 2.16 2.49 2.79 2.64 3.05 3.41 3.06 3.53 3.95
3.6 1.97 2.27 2.54 2.41 2.78 3.11 2.79 3.23 3.61
4.2 1.82 2.11 2.35 2.23 2.57 2.88 2.59 2.99 3.34
4.8 1.71 1.97 2.20 2.09 2.41 2.69 2.42 2.79 3.12
5.4 1.61 1.86 2.08 1.97 2.27 2.54 2.28 2.63 2.95
6.0 1.53 1.76 1.97 1.86 2.15 2.41 2.11 2.50 2.79
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 2.4 2.29 2.60 2.80 2.80 3.23 3.57 3.24 3.75 4.19
3.0 2.04 2.36 2.60 2.50 2.89 3.23 2.90 3.35 3.75
3.6 1.87 2.16 2.41 2.28 2.64 2.95 2.65 3.06 3.42
4.2 1.73 2.00 2.23 2.11 2.44 2.73 2.45 2.83 3.17
4.8 1.62 1.87 2.09 1.98 2.28 2.55 2.29 2.65 2.96
5.4 1.52 1.76 1.97 1.86 2.15 2.41 2.11 2.50 2.79
6.0 1.44 1.67 1.87 1.72 2.04 2.28 1.96 2.37 2.65
No. 1 and No. 2 2.4 1.94 2.24 2.50 2.37 2.73 3.06 2.75 3.17 3.55
3.0 1.73 2.00 2.24 2.12 2.44 2.73 2.46 2.84 3.17
3.6 1.58 1.83 2.04 1.93 2.23 2.50 2.24 2.59 2.90
4.2 1.46 1.69 1.89 1.79 2.07 2.31 2.08 2.40 2.68
4.8 1.37 1.58 1.77 1.67 1.93 2.16 1.94 2.24 2.51
5.4 1.29 1.49 1.67 1.58 1.82 2.04 1.83 2.11 2.36
6.0 1.22 1.41 1.58 1.50 1.73 1.93 1.74 2.01 2.24
Notes to Table A-9:
(1) Beam spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3.
(2) When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8.
(3) Supported length means half the sum of the joist spans on both sides of the beam.
(4) Straight interpolation may be used for other supported lengths.
(5) Spans are clear spans between supports. For total span, add two bearing lengths.
(6) 3-ply beams require 114 mm bearing. 4-ply and 5-ply beams with supported lengths greater than 3 m require 114 mm bearing. All other beams require 76 mm bearing.
Table A-10
Maximum Spans for Built-up Floor Beams Supporting not more than Three Floors(1)(2)
Forming part of Sentence 9.23.4.2.(3)
Commercial Designation Grade

Supported Length, m(3)(4)

Maximum Span, m(5)(6)
Size of Built-up Beam, mm
3- 38x184 4- 38x184 5- 38x184 3- 38x235 4- 38x235 5- 38x235 3- 38x286 4- 38x286 5- 38x286
Douglas Fir – Larch (includes Douglas Fir and Western Larch) Select Structural 2.4 2.38 2.74 2.95 2.91 3.36 3.75 3.37 3.89 4.35
3.0 2.13 2.46 2.74 2.60 3.00 3.36 2.92 3.48 3.89
3.6 1.88 2.24 2.51 2.24 2.74 3.06 2.53 3.18 3.56
4.2 1.66 2.08 2.32 1.99 2.49 2.84 2.25 2.81 3.29
4.8 1.50 1.88 2.17 1.80 2.24 2.65 2.04 2.53 3.02
5.4 1.38 1.71 2.05 1.65 2.04 2.44 1.88 2.31 2.75
6.0 1.28 1.58 1.88 1.53 1.89 2.24 1.75 2.14 2.53
No. 1 and No. 2 2.4 1.85 2.14 2.39 2.26 2.61 2.92 2.63 3.03 3.39
3.0 1.66 1.91 2.14 2.02 2.34 2.61 2.35 2.71 3.03
3.6 1.51 1.74 1.95 1.85 2.13 2.39 2.14 2.48 2.77
4.2 1.40 1.62 1.81 1.71 1.98 2.21 1.99 2.29 2.56
4.8 1.31 1.51 1.69 1.60 1.85 2.07 1.86 2.14 2.40
5.4 1.23 1.42 1.59 1.51 1.74 1.95 1.75 2.02 2.26
6.0 1.17 1.35 1.51 1.43 1.65 1.85 1.66 1.92 2.14
Hem – Fir (includes Western Hemlock and Amabilis Fir) Select Structural 2.4 2.22 2.70 2.91 2.64 3.31 3.70 2.98 3.78 4.29
3.0 1.85 2.35 2.70 2.21 2.79 3.31 2.50 3.14 3.78
3.6 1.61 2.02 2.43 1.92 2.40 2.89 2.18 2.71 3.24
4.2 1.43 1.78 2.14 1.71 2.13 2.54 1.95 2.40 2.86
4.8 1.30 1.61 1.92 1.56 1.92 2.28 1.77 2.18 2.58
5.4 1.19 1.47 1.74 1.44 1.76 2.08 1.64 2.00 2.35
6.0 1.11 1.36 1.61 1.34 1.63 1.92 1.53 1.85 2.18
No. 1 and No. 2 2.4 1.94 2.24 2.51 2.37 2.74 3.06 2.75 3.18 3.56
3.0 1.74 2.00 2.24 2.12 2.45 2.74 2.46 2.84 3.18
3.6 1.58 1.83 2.05 1.92 2.24 2.50 2.18 2.60 2.90
4.2 1.43 1.69 1.89 1.71 2.07 2.32 1.95 2.40 2.69
4.8 1.30 1.58 1.77 1.56 1.92 2.17 1.77 2.18 2.51
5.4 1.19 1.47 1.67 1.44 1.76 2.04 1.64 2.00 2.35
6.0 1.11 1.36 1.58 1.34 1.63 1.92 1.53 1.85 2.18
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) Select Structural 2.4 2.35 2.58 2.78 2.89 3.30 3.55 3.24 3.89 4.33
3.0 2.02 2.40 2.58 2.40 3.00 3.30 2.71 3.42 3.89
3.6 1.74 2.20 2.43 2.08 2.62 3.06 2.35 2.95 3.54
4.2 1.55 1.94 2.31 1.85 2.31 2.77 2.10 2.61 3.12
4.8 1.40 1.74 2.09 1.68 2.08 2.48 1.91 2.35 2.80
5.4 1.28 1.59 1.90 1.54 1.90 2.26 1.76 2.16 2.55
6.0 1.19 1.47 1.74 1.44 1.76 2.08 1.64 2.00 2.35
No. 1 and No. 2 2.4 2.01 2.32 2.60 2.46 2.84 3.17 2.85 3.29 3.68
3.0 1.80 2.08 2.32 2.20 2.54 2.84 2.55 2.95 3.29
3.6 1.64 1.90 2.12 2.01 2.32 2.59 2.33 2.69 3.01
4.2 1.52 1.75 1.96 1.85 2.15 2.40 2.10 2.49 2.78
4.8 1.40 1.64 1.84 1.68 2.01 2.24 1.91 2.33 2.60
5.4 1.28 1.55 1.73 1.54 1.89 2.12 1.76 2.16 2.46
6.0 1.19 1.47 1.64 1.44 1.76 2.01 1.64 2.00 2.33
Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules) Select Structural 2.4 1.91 2.20 2.46 2.33 2.69 3.01 2.70 3.12 3.49
3.0 1.70 1.97 2.20 2.08 2.41 2.69 2.42 2.79 3.12
3.6 1.56 1.80 2.01 1.90 2.20 2.46 2.18 2.55 2.85
4.2 1.43 1.66 1.86 1.71 2.03 2.27 1.95 2.36 2.64
4.8 1.30 1.56 1.74 1.56 1.90 2.13 1.77 2.18 2.47
5.4 1.19 1.47 1.64 1.44 1.76 2.01 1.64 2.00 2.33
6.0 1.11 1.36 1.56 1.34 1.63 1.90 1.53 1.85 2.18
No. 1 and No. 2 2.4 1.61 1.86 2.08 1.97 2.28 2.55 2.29 2.64 2.96
3.0 1.44 1.67 1.86 1.76 2.04 2.28 2.05 2.36 2.64
3.6 1.32 1.52 1.70 1.61 1.86 2.08 1.87 2.16 2.41
4.2 1.22 1.41 1.57 1.49 1.72 1.93 1.73 2.00 2.23
4.8 1.14 1.32 1.47 1.40 1.61 1.80 1.62 1.87 2.09
5.4 1.08 1.24 1.39 1.32 1.52 1.70 1.53 1.76 1.97
6.0 1.02 1.18 1.32 1.25 1.44 1.61 1.45 1.67 1.87
Notes to Table A-10:
(1) Beam spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3.
(2) When the floors have a concrete topping of not more than 51 mm, the spans must be multiplied by 0.8.
(3) Supported length means half the sum of the joist spans on both sides of the beam.
(4) Straight interpolation may be used for other supported lengths.
(5) Spans are clear spans between supports. For total span, add two bearing lengths.
(6) 3-ply beams with supported lengths greater than 4.2 m require 152 mm bearing. All other beams require 114 mm bearing.
Table A-11
Maximum Spans for Glued-Laminated Floor Beams – 20f-E Grade(1)
Forming part of Sentence 9.23.4.2.(3)

Number of Storeys Supported

Beam Width, mm

Supported Length, m(2)(3)

Maximum Span, m(4)(5)(6)(7)
Beam Depth, mm
228 266 304 342 380 418 456
1 80 2.4 4.32 5.04 5.76 6.48 7.20 7.92 8.64
3.0 3.87 4.51 5.15 5.80 6.44 7.09 7.73
3.6 3.53 4.12 4.70 5.29 5.88 6.47 7.06
4.2 3.27 3.81 4.36 4.90 5.44 5.99 6.53
4.8 3.06 3.57 4.07 4.58 5.09 5.60 6.11
5.4 2.88 3.36 3.84 4.32 4.80 5.28 5.76
6.0 2.73 3.19 3.64 4.10 4.56 5.01 5.47
130 2.4 5.51 6.43 7.35 8.26 9.18 10.10 11.02
3.0 4.93 5.75 6.57 7.39 8.21 9.03 9.86
3.6 4.50 5.25 6.00 6.75 7.50 8.25 9.00
4.2 4.16 4.86 5.55 6.25 6.94 7.64 8.33
4.8 3.90 4.54 5.19 5.84 6.49 7.14 7.79
5.4 3.67 4.28 4.90 5.51 6.12 6.73 7.35
6.0 3.48 4.07 4.65 5.23 5.81 6.39 6.97
2 80 2.4 3.28 3.83 4.37 4.92 5.47 6.01 6.56
3.0 2.93 3.42 3.91 4.40 4.89 5.38 5.87
3.6 2.68 3.12 3.57 4.02 4.46 4.91 5.36
4.2 2.48 2.89 3.31 3.72 4.13 4.54 4.96
4.8 2.32 2.71 3.09 3.48 3.86 4.25 4.64
5.4 2.19 2.55 2.91 3.28 3.64 4.01 4.37
6.0 2.07 2.42 2.77 3.11 3.46 3.80 4.15
130 2.4 4.18 4.88 5.57 6.27 6.97 7.66 8.36
3.0 3.74 4.36 4.99 5.61 6.23 6.85 7.48
3.6 3.41 3.98 4.55 5.12 5.69 6.26 6.83
4.2 3.16 3.69 4.21 4.74 5.27 5.79 6.32
4.8 2.96 3.45 3.94 4.43 4.93 5.42 5.91
5.4 2.79 3.25 3.72 4.18 4.64 5.11 5.57
6.0 2.64 3.08 3.53 3.97 4.41 4.85 5.29
3 80 2.4 2.75 3.21 3.66 4.12 4.58 5.04 5.50
3.0 2.46 2.87 3.28 3.69 4.10 4.51 4.92
3.6 2.24 2.62 2.99 3.37 3.74 4.11 4.49
4.2 2.08 2.42 2.77 3.12 3.46 3.81 4.15
4.8 1.94 2.27 2.59 2.91 3.24 3.56 3.89
5.4 1.83 2.14 2.44 2.75 3.05 3.36 3.66
6.0 1.74 2.03 2.32 2.61 2.90 3.19 3.48
130 2.4 3.50 4.09 4.67 5.25 5.84 6.42 7.01
3.0 3.13 3.66 4.18 4.70 5.22 5.74 6.27
3.6 2.86 3.34 3.81 4.29 4.77 5.24 5.72
4.2 2.65 3.09 3.53 3.97 4.41 4.85 5.30
4.8 2.48 2.89 3.30 3.72 4.13 4.54 4.95
5.4 2.34 2.72 3.11 3.50 3.89 4.28 4.67
6.0 2.22 2.58 2.95 3.32 3.69 4.06 4.43
Notes to Table A-11:
(1) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.5.3.
(2) Supported length means half the sum of the joist spans on both sides of the beam.
(3) Straight interpolation may be used for other supported lengths.
(4) Spans are valid for glued-laminated timber conforming to CAN/CSA-O122 and CSA O177.
(5) Spans are clear spans between supports. For total span, add two bearing lengths.
(6) Provide a minimum bearing length of 89 mm. (Alternatively, the bearing length may be designed in accordance with Part 4.)
(7) Top edge of beam assumed to be fully laterally supported by joists.
Table A-12
Maximum Spans for Built-up Ridge Beams and Lintels Supporting the Roof and Ceiling Only, No. 1 or No. 2 Grade
Forming part of Sentences 9.23.4.2.(4) and 9.23.12.3.(1)
Commercial Designation Beam or Lintel Size, mm

Maximum Span, m(1)(2)(3)
Specified Snow Load, kPa
1.0 1.5 2.0 2.5 3.0
Douglas Fir – Larch (includes Douglas Fir and Western Larch) 3-38x184 2.65 2.28 2.03 1.85 1.71
4-38x184 3.06 2.64 2.35 2.14 1.97
5-38x184 3.43 2.95 2.62 2.39 2.21
3-38x235 3.25 2.79 2.49 2.26 2.09
4-38x235 3.75 3.22 2.87 2.61 2.41
5-38x235 4.19 3.60 3.21 2.92 2.70
3-38x286 3.77 3.24 2.88 2.62 2.43
4-38x286 4.35 3.74 3.33 3.03 2.80
5-38x286 4.86 4.18 3.72 3.39 3.13
Hem – Fir (includes Western Hemlock and Amabilis Fir) 3-38x184 2.78 2.39 2.13 1.94 1.79
4-38x184 3.21 2.76 2.46 2.24 2.07
5-38x184 3.59 3.09 2.75 2.50 2.31
3-38x235 3.40 2.93 2.61 2.37 2.19
4-38x235 3.93 3.38 3.01 2.74 2.53
5-38x235 4.39 3.78 3.36 3.06 2.83
3-38x286 3.95 3.40 3.02 2.75 2.54
4-38x286 4.56 3.92 3.49 3.18 2.94
5-38x286 5.10 4.38 3.90 3.55 3.28
Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce) Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir) 3-38x184 2.88 2.48 2.21 2.01 1.86
4-38x184 3.30 2.86 2.55 2.32 2.14
5-38x184 3.55 3.10 2.82 2.59 2.40
3-38x235 3.53 3.03 2.70 2.46 2.27
4-38x235 4.07 3.50 3.12 2.84 2.62
5-38x235 4.54 3.91 3.49 3.17 2.93
3-38x286 4.09 3.52 3.13 2.85 2.63
4-38x286 4.72 4.06 3.62 3.29 3.04
5-38x286 5.28 4.54 4.04 3.68 3.40
Notes to Table A-12:
(1) Beam and lintel spans are calculated based on a maximum supported length of 4.9 m. Spans may be increased by 5 per cent for supported lengths of not more than 4.3 m, by 10 per cent for supported lengths of not more than 3.7 m, and by 25 per cent for supported lengths of not more than 2.4 m.
(2) For ridge beams, supported length means half the sum of the rafter, joist or truss spans on both sides of the beam. For lintels, supported length means half the sum of truss, roof joist or rafter spans supported by the lintel plus the length of the overhang beyond the lintel.
(3) Provide minimum 76 mm bearing.

contentHistory

Table A-13
Maximum Spans for Douglas Fir – Larch Lintels – No. 1 or No. 2 Grade – Non-structural Sheathing(1)
Forming part of Sentences 9.23.12.3.(1) and (3)
Lintel Supporting

Lintel Size,(2) mm

Maximum Span, m(3)(4)
Exterior Walls Interior Walls
Specified Snow Load, kPa
1.0 1.5 2.0 2.5 3.0
Limited attic storage and ceiling 2-38x89 This Area Intentionally Left Blank 1.25
2-38x140 1.78
2-38x184 2.17
2-38x235 2.65
2-38x286 3.08

Roof and ceiling only (tributary width of 0.6 m maximum)(5)

 2-38x89 2.68 2.34 2.13 1.97 1.86 1.97
2-38x140 4.21 3.68 3.34 3.10 2.92 3.10
2-38x184 5.50 4.84 4.39 4.08 3.84 4.08
2-38x235 6.61 5.97 5.56 5.21 4.88 5.21
2-38x286 7.66 6.92 6.44 6.09 5.66 6.09

Roof and ceiling only (tributary width of 4.9 m maximum)(6)

 2-38x89 1.25 1.07 0.96 0.87 0.80 0.87
2-38x140 1.78 1.53 1.36 1.24 1.15 1.24
2-38x184 2.17 1.86 1.66 1.51 1.40 1.51
2-38x235 2.65 2.28 2.03 1.85 1.71 1.85
2-38x286 3.08 2.64 2.35 2.14 1.98 2.14

Roof, ceiling and 1 storey(3)(6)(7)

 2-38x89 0.96 0.88 0.82 0.77 0.73 0.68
2-38x140 1.37 1.26 1.17 1.10 1.04 0.97
2-38x184 1.67 1.53 1.42 1.34 1.26 1.18
2-38x235 2.04 1.88 1.74 1.63 1.54 1.44
2-38x286 2.37 2.18 2.02 1.90 1.79 1.67

Roof, ceiling and 2 storeys(3)(6)(7)

 2-38x89 0.86 0.81 0.77 0.73 0.70 0.61
2-38x140 1.23 1.16 1.09 1.04 0.99 0.87
2-38x184 1.50 1.41 1.33 1.27 1.21 1.06
2-38x235 1.84 1.72 1.63 1.55 1.48 1.30
2-38x286 2.13 2.00 1.89 1.80 1.72 1.51

Roof, ceiling and 3 storeys(3)(6)(7)

 2-38x89 0.81 0.77 0.73 0.71 0.68 0.57
2-38x140 1.15 1.10 1.05 1.01 0.97 0.82
2-38x184 1.40 1.33 1.28 1.22 1.18 1.00
2-38x235 1.71 1.63 1.56 1.50 1.44 1.22
2-38x286 1.99 1.89 1.81 1.74 1.67 1.41
Notes to Table A-13:
(1) Where structural sheathing is used, lintel spans may be increased by 15 per cent. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121, CSA O151, CAN/CSA-O325 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.A
(2) A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge.
(3) 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% for “roof, ceiling and 2 storeys,” and by 25 per cent for “roof, ceiling and 3 storeys.”
(4) For ends of lintels fully supported by walls, provide minimum 38 mm bearing for lintel spans up to 3 m, or minimum 76 mm bearing for lintel spans greater than 3 m.
(5) Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses.
(6) Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5 per cent if rafter and joist spans are no greater than 4.3 m and roof truss spans are no greater than 8.6 m. Spans may be increased by 10 per cent if rafter and joist spans are no greater than 3.7 m and roof truss spans are no greater than 7.4 m.
(7) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load does not exceed that specified for residential areas as described in Table 4.1.5.3.

contentHistory

Table A-14
Maximum Spans for Hem – Fir Lintels – No. 1 or No. 2 Grade – Non-structural Sheathing(1)
Forming part of Sentences 9.23.12.3.(1) and (3)
Lintel Supporting

Lintel Size,(2) mm

Maximum Span, m(3)(4)
Exterior Walls Interior Walls
Specified Snow Load, kPa
1.0 1.5 2.0 2.5 3.0
Limited attic storage and ceiling 2-38x89 This Area Intentionally Left Blank 1.31
2-38x140 1.87
2-38x184 2.27
2-38x235 2.78
2-38x286 3.23

Roof and ceiling only (tributary width of 0.6 m maximum)(5)

 2-38x89 2.68 2.34 2.13 1.97 1.86 1.97
2-38x140 4.21 3.68 3.34 3.10 2.92 3.10
2-38x184 5.50 4.84 4.39 4.08 3.84 4.08
2-38x235 6.61 5.97 5.56 5.21 4.90 5.21
2-38x286 7.66 6.92 6.44 6.09 5.82 6.09

Roof and ceiling only (tributary width of 4.9 m maximum)(6)

 2-38x89 1.31 1.13 1.00 0.91 0.84 0.91
2-38x140 1.87 1.61 1.43 1.30 1.20 1.30
2-38x184 2.27 1.95 1.74 1.58 1.42 1.58
2-38x235 2.78 2.39 2.13 1.92 1.71 1.92
2-38x286 3.23 2.77 2.47 2.17 1.94 2.17

Roof, ceiling and 1 storey(3)(6)(7)

 2-38x89 1.01 0.93 0.86 0.81 0.76 0.69
2-38x140 1.44 1.32 1.23 1.14 1.05 0.95
2-38x184 1.75 1.61 1.47 1.34 1.23 1.12
2-38x235 2.14 1.96 1.76 1.60 1.48 1.35
2-38x286 2.49 2.22 2.00 1.82 1.69 1.55

Roof, ceiling and 2 storeys(3)(6)(7)

 2-38x89 0.91 0.85 0.80 0.76 0.72 0.60
2-38x140 1.29 1.21 1.13 1.05 0.98 0.82
2-38x184 1.57 1.44 1.33 1.24 1.16 0.98
2-38x235 1.90 1.73 1.60 1.49 1.40 1.19
2-38x286 2.15 1.97 1.82 1.70 1.60 1.37

Roof, ceiling and 3 storeys(3)(6)(7)

 2-38x89 0.85 0.81 0.77 0.74 0.69 0.55
2-38x140 1.21 1.14 1.06 1.00 0.95 0.76
2-38x184 1.43 1.33 1.25 1.18 1.12 0.91
2-38x235 1.72 1.60 1.50 1.42 1.35 1.10
2-38x286 1.95 1.82 1.72 1.63 1.55 1.27
Notes to Table A-14:
(1) Where structural sheathing is used, lintel spans may be increased by 15 per cent. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121, CSA O151, CAN/CSA-O325 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.A
(2) A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge.
(3) 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.”
(4) For ends of lintels fully supported by walls, provide minimum 38 mm bearing for lintel spans up to 3 m, or minimum 76 mm bearing for lintel spans greater than 3 m.
(5) Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses.
(6) Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5 per cent if rafter and joist spans are no greater than 4.3 m and roof truss spans are no greater than 8.6 m. Spans may be increased by 10 per cent if rafter and joist spans are no greater than 3.7 m and roof truss spans are no greater than 7.4 m.
(7) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load does not exceed that specified for residential areas as described in Table 4.1.5.3.

contentHistory

Table A-15
Maximum Spans for Spruce – Pine – Fir Lintels – No. 1 or No. 2 Grade – Non-structural Sheathing(1)
Forming part of Sentences 9.23.12.3.(1) and (3)
Lintel Supporting

Lintel Size,(2) mm

Maximum Span, m(3)(4)
Exterior Walls Interior Walls
Specified Snow Load, kPa
1.0 1.5 2.0 2.5 3.0
Limited attic storage and ceiling 2-38x89 This Area Intentionally Left Blank 1.27
2-38x140 1.93
2-38x184 2.35
2-38x235 2.88
2-38x286 3.34

Roof and ceiling only (tributary width of 0.6 m maximum)(5)

 2-38x89 2.55 2.23 2.02 1.88 1.77 1.88
2-38x140 4.01 3.50 3.18 2.96 2.78 2.96
2-38x184 5.27 4.61 4.18 3.88 3.66 3.88
2-38x235 6.37 5.76 5.34 4.96 4.67 4.96
2-38x286 7.38 6.67 6.21 5.87 5.61 5.87

Roof and ceiling only (tributary width of 4.9 m maximum)(6)

 2-38x89 1.27 1.11 1.01 0.93 0.87 0.93
2-38x140 1.93 1.66 1.48 1.35 1.25 1.35
2-38x184 2.35 2.02 1.80 1.64 1.52 1.64
2-38x235 2.88 2.47 2.20 2.01 1.84 2.01
2-38x286 3.34 2.87 2.56 2.33 2.09 2.33

Roof, ceiling and 1 storey(3)(6)(7)

 2-38x89 1.05 0.96 0.89 0.84 0.79 0.74
2-38x140 1.49 1.37 1.27 1.19 1.13 1.02
2-38x184 1.82 1.67 1.55 1.44 1.33 1.20
2-38x235 2.22 2.04 1.89 1.73 1.59 1.45
2-38x286 2.58 2.36 2.15 1.96 1.81 1.66

Roof, ceiling and 2 storeys(3)(6)(7)

 2-38x89 0.94 0.88 0.83 0.79 0.76 0.64
2-38x140 1.34 1.26 1.19 1.13 1.06 0.88
2-38x184 1.63 1.53 1.44 1.33 1.25 1.05
2-38x235 1.99 1.87 1.72 1.60 1.50 1.27
2-38x286 2.31 2.12 1.96 1.82 1.71 1.45

Roof, ceiling and 3 storeys(3)(6)(7)

 2-38x89 0.88 0.83 0.80 0.77 0.74 0.59
2-38x140 1.25 1.19 1.14 1.08 1.02 0.81
2-38x184 1.52 1.44 1.35 1.27 1.21 0.97
2-38x235 1.86 1.73 1.62 1.53 1.45 1.17
2-38x286 2.11 1.96 1.84 1.74 1.66 1.35
Notes to Table A-15:
(1) Where structural sheathing is used, lintel spans may be increased by 15%. Structural sheathing consists of a minimum 9.5 mm thick structural panel conforming to CSA O121, CSA O151, CAN/CSA-O325 or CSA O437.0 fastened with at least two rows of fasteners to the exterior face of the lintel, and a single row to the top plates and studs. Fasteners shall conform to Table 9.23.3.5.A
(2) A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge.
(3) If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for “roof, ceiling and 1 storey,” by 20% for “roof, ceiling and 2 storeys,” and by 25% for “roof, ceiling and 3 storeys.”
(4) For ends of lintels fully supported by walls, provide minimum 38 mm bearing for lintel spans up to 3 m, or minimum 76 mm bearing for lintel spans greater than 3 m.
(5) Spans for 0.6 m tributary width are calculated for lintels in end walls that support only a 0.6 m width of roof and ceiling, but do not support roof joists, roof rafters or roof trusses.
(6) Lintel spans are calculated based on a maximum floor joist, roof joist or rafter span of 4.9 m and a maximum roof truss span of 9.8 m. Lintel spans may be increased by 5% if rafter and joist spans are no greater than 4.3 m and roof truss spans are no greater than 8.6 m. Spans may be increased by 10% if rafter and joist spans are no greater than 3.7 m and roof truss spans are no greater than 7.4 m.
(7) Spans apply only where the floors serve residential areas as described in Table 4.1.5.3., or the uniformly distributed live load does not exceed that specified for residential areas as described in Table 4.1.5.3.
Table A-16
Maximum Spans for Glued-Laminated Timber Lintels – 20f-E Stress Grade – Exterior Walls – Roof and Ceiling Load Only
Forming part of Sentences 9.23.12.3.(1) and (3)
Lintel Size, mm

Maximum Span, m(1)(2)(3)
Specified Snow Load, kPa
1.0 1.5 2.0 2.5 3.0

Supported length, m(4)(5)

Supported length, m(4)(5)

Supported length, m(4)(5)

Supported length, m(4)(5)

Supported length, m(4)(5)
2.4 3.6 4.8 2.4 3.6 4.8 2.4 3.6 4.8 2.4 3.6 4.8 2.4 3.6 4.8
130 x 304 6.23 5.63 5.24 5.63 5.09 4.73 5.24 4.73 4.40 4.95 4.48 4.17 4.73 4.28 3.87
80 x 380 6.52 5.89 5.48 5.89 5.32 4.96 5.48 4.96 4.52 5.19 4.69 4.11 4.96 4.39 3.80
130 x 342 6.80 6.15 5.72 6.15 5.56 5.17 5.72 5.17 4.81 5.41 4.89 4.55 5.17 4.67 4.35
80 x 418 7.00 6.33 5.89 6.33 5.72 5.32 5.89 5.32 4.96 5.57 5.03 4.52 5.32 4.81 4.18
130 x 380 7.36 6.65 6.19 6.65 6.01 5.59 6.19 5.59 5.21 5.86 5.29 4.92 5.59 5.06 4.70
80 x 456 7.48 6.76 6.29 6.76 6.10 5.68 6.29 5.68 5.29 5.95 5.37 4.93 5.68 5.13 4.56
130 x 418 7.91 7.15 6.65 7.15 6.46 6.01 6.65 6.01 5.59 6.29 5.68 5.29 6.01 5.43 5.05
80 x 494 7.94 7.17 6.68 7.17 6.48 6.03 6.68 6.03 5.61 6.31 5.71 5.31 6.03 5.45 4.94
80 x 532 8.39 7.58 7.06 7.58 6.85 6.38 7.06 6.38 5.93 6.67 6.03 5.61 6.38 5.76 5.32
130 x 456 8.44 7.63 7.10 7.63 6.89 6.41 7.10 6.41 5.97 6.71 6.07 5.65 6.41 5.80 5.39
Notes to Table A-16:
(1) Spans are valid for glued-laminated timber conforming to CAN/CSA-O122 and CSA O177.
(2) Provide minimum 89 mm bearing. (Alternatively, the bearing length may be calculated in accordance with Part 4.)
(3) Top edge of lintel assumed to be fully laterally supported.
(4) Supported length means half the length of trusses or rafters, plus the length of the overhang beyond the wall.
(5) For intermediate supported lengths, straight interpolation may be used.
Table A-17
Maximum Allowable Clear Spans for Lintels in Flat Loadbearing Insulating Concrete Form (ICF) Walls(1)(2)(3) (1-10M Bottom Bar)
Forming part of Sentence 9.20.17.4.(3)
Minimum Lintel Thickness, mm Minimum Lintel Depth, mm Maximum Clear Span, m
Supporting Light-Frame Roof Only

Supporting ICF Second Storey and Light-Frame Roof

Maximum Ground Snow Load, kN/m2
1.50 3.33 1.50 3.33
140 200 1.41 1.18 1.03 0.93
300 1.78 1.50 1.30 1.18
400 2.08 1.75 1.53 1.38
500 2.33 1.97 1.72 1.56
600 2.55 2.16 1.89 1.71
150 200 1.41 1.18 1.02 0.92
300 1.78 1.50 1.29 1.17
400 2.08 1.75 1.51 1.37
500 2.33 1.97 1.70 1.54
600 2.54 2.15 1.87 1.70
160 200 1.41 1.18 1.01 0.91
300 1.78 1.50 1.28 1.16
400 2.07 1.75 1.50 1.36
500 2.32 1.96 1.68 1.53
600 2.53 2.15 1.85 1.68
190 200 1.41 1.19 0.98 0.89
300 1.78 1.50 1.24 1.13
400 2.06 1.74 1.45 1.32
500 2.30 1.95 1.63 1.49
600 2.51 2.13 1.78 1.63
200 200 1.41 1.19 0.97 0.89
300 1.77 1.49 1.23 1.12
400 2.06 1.74 1.43 1.31
500 2.30 1.95 1.61 1.48
600 2.50 2.13 1.77 1.62
240 200 1.41 1.19 0.94 0.86
300 1.76 1.49 1.18 1.09
400 2.04 1.73 1.38 1.27
500 2.27 1.93 1.55 1.43
600 2.47 2.11 1.70 1.56
Notes to Table A-17:
(1) Deflection criterion is L/240, where “L” is the clear span of the lintel.
(2) Linear interpolation is permitted between ground snow loads and between lintel depths.
(3) 10M stirrups are required at a maximum d/2 spacing for spans greater than 1 200 mm, where “d” is the distance from the top of the lintel to the level of the bottom reinforcing bar in the lintel.
Table A-18
Maximum Allowable Clear Spans for Lintels in Flat Loadbearing Insulating Concrete Form (ICF) Walls(1)(2)(3) (1-15M Bottom Bar)
Forming part of Sentence 9.20.17.4.(3)
Minimum Lintel Thickness, mm Minimum Lintel Depth, mm Maximum Clear Span, m
Supporting Light-Frame Roof Only

Supporting ICF Second Storey and Light-Frame Roof

Maximum Ground Snow Load, kN/m2
1.50 3.33 1.50 3.33
140 200 1.63 1.46 1.31 1.23
300 2.43 2.08 1.81 1.64
400 2.90 2.44 2.13 1.93
500 3.26 2.75 2.41 2.18
600 3.58 3.03 2.65 2.4
150 200 1.67 1.49 1.33 1.25
300 2.48 2.08 1.79 1.62
400 2.90 2.44 2.11 1.91
500 3.26 2.75 2.38 2.16
600 3.57 3.02 2.62 2.38
160 200 1.70 1.53 1.35 1.26
300 2.48 2.08 1.78 1.61
400 2.90 2.44 2.09 1.90
500 3.25 2.75 2.36 2.14
600 3.56 3.02 2.59 2.36
190 200 1.80 1.61 1.36 1.24
300 2.48 2.09 1.73 1.58
400 2.89 2.44 2.03 1.85
500 3.23 2.74 2.29 2.09
600 3.53 3.00 2.51 2.30
200 200 1.83 1.64 1.35 1.23
300 2.48 2.09 1.71 1.57
400 2.88 2.44 2.01 1.84
500 3.22 2.74 2.26 2.07
600 3.52 2.99 2.48 2.28
240 200 1.93 1.65 1.30 1.20
300 2.47 2.08 1.66 1.52
400 2.86 2.43 1.94 1.78
500 3.19 2.72 2.18 2.01
600 3.47 2.97 2.39 2.20
Notes to Table A-18:
(1) Deflection criterion is L/240, where “L” is the clear span of the lintel.
(2) Linear interpolation is permitted between ground snow loads and between lintel depths.
(3) 10M stirrups are required at a maximum d/2 spacing for spans greater than 1 200 mm, where “d” is the distance from the top of the lintel to the level of the bottom reinforcing bar in the lintel.
Table A-19
Maximum Allowable Clear Spans for Lintels in Flat Loadbearing Insulating Concrete Form (ICF) Walls(1)(2)(3) (2-15M Bottom Bar)
Forming part of Sentence 9.20.17.4.(3)
Minimum Lintel Thickness, mm Minimum Lintel Depth, mm Maximum Clear Span, m
Supporting Light-Frame Roof Only

Supporting ICF Second Storey and Light-Frame Roof

Maximum Ground Snow Load, kN/m2
1.50 3.33 1.50 3.33
140 200 1.63 1.46 1.31 1.23
300 2.43 2.18 1.96 1.84
400 3.22 2.90 2.60 2.42
500 4.00 3.60 3.25 2.70
600 4.71 4.20 3.61 2.97
150 200 1.67 1.49 1.33 1.25
300 2.48 2.23 1.99 1.87
400 3.29 2.96 2.64 2.45
500 4.80 3.68 3.29 2.74
600 4.87 4.20 3.64 3.02
160 200 1.70 1.53 1.35 1.27
300 2.53 2.28 2.02 1.90
400 3.36 3.02 2.68 2.48
500 4.16 3.76 3.27 2.78
600 4.95 4.20 3.61 3.08
190 200 1.80 1.61 1.39 1.32
300 2.67 2.40 2.09 1.97
400 3.53 3.19 2.77 2.56
500 4.38 3.81 3.18 2.90
600 4.92 4.19 3.50 3.21
200 200 1.83 1.64 1.41 1.33
300 2.87 2.44 2.11 2.00
400 3.78 3.24 2.79 2.55
500 4.46 3.81 3.15 2.89
600 4.86 4.18 3.47 3.18
240 200 2.07 1.74 1.46 1.38
300 3.07 2.59 2.18 2.07
400 3.95 3.38 2.70 2.48
500 4.40 3.80 3.04 2.80
600 4.78 4.16 3.34 3.08
Notes to Table A-19:
(1) Deflection criterion is L/240, where “L” is the clear span of the lintel.
(2) Linear interpolation is permitted between ground snow loads and between lintel depths.
(3) 10M stirrups are required at a maximum d/2 spacing for spans greater than 1 200 mm, where “d” is the distance from the top of the lintel to the level of the bottom reinforcing bar in the lintel.