Tempo:
Table 19 (continued) Maximum spans for glue-laminated floor beams – 20f-E grade1
Number of Floors Supported 2
Beam Width, mm (in.) 130 (5)
3
80 (3)
3
130 (5)
Maximum Span, m (ft.–in.)2 to 5 Beam Depth, mm (in.)
Supported Length, m6, 7 ft
228 9
266 101⁄2
304 12
342 131⁄2
380 15
418 161⁄2
456 18
2.4 8 3.0 10 3.6 12 4.2 14 4.8 16 5.4 18 6.0 20 2.4 8 3.0 10 3.6 12 4.2 14 4.8 16 5.4 18 6.0 20 2.4 8 3.0 10 3.6 12 4.2 14 4.8 16 5.4 18 6.0 20
4.18 13–7 3.74 12–2 3.41 11–1 3.16 10–3 2.96 9–7 2.79 9–1 2.64 8–7 2.75 8–11 2.46 8–0 2.24 7–4 2.08 6–9 1.94 6–4 1.83 6–0 1.74 5–8 3.50 11–5 3.13 10–2 2.86 9–4 2.65 8–7 2.48 8–1 2.34 7–7 2.22 7–3
4.88 15–10 4.36 14–2 3.98 13–0 3.69 12–0 3.45 11–3 3.25 10–7 3.08 10–0 3.21 10–5 2.87 9–4 2.62 8–6 2.42 7–11 2.27 7–5 2.14 6–11 2.03 6–7 4.09 13–4 3.66 11–11 3.34 10–10 3.09 10–1 2.89 9–5 2.72 8–10 2.58 8–5
5.57 18–2 4.99 16–3 4.55 14–10 4.21 13–9 3.94 12–10 3.72 12–1 3.53 11–6 3.66 11–11 3.28 10–8 2.99 9–9 2.77 9–0 2.59 8–5 2.44 7–11 2.32 7–7 4.67 15–2 4.18 13–7 3.81 12–5 3.53 11–6 3.30 10–9 3.11 10–2 2.95 9–7
6.27 20–5 5.61 18–3 5.12 16–8 4.74 15–5 4.43 14–5 4.18 13–7 3.97 12–11 4.12 13–5 3.69 12–0 3.37 10–11 3.12 10–2 2.91 9–6 2.75 8–11 2.61 8–6 5.25 17–1 4.70 15–4 4.29 14–0 3.97 12–11 3.72 12–1 3.50 11–5 3.32 10–10
6.97 22–8 6.23 20–3 5.69 18–6 5.27 17–2 4.93 16–0 4.64 15–1 4.41 14–4 4.58 14–11 4.10 13–4 3.74 12–2 3.46 11–3 3.24 10–6 3.05 9–11 2.90 9–5 5.84 19–0 5.22 17–0 4.77 15–6 4.41 14–4 4.13 13–5 3.89 12–8 3.69 12–0
7.66 24–11 6.85 22–4 6.26 20–4 5.79 18–10 5.42 17–8 5.11 16–8 4.85 15–9 5.04 16–5 4.51 14–8 4.11 13–5 3.81 12–5 3.56 11–7 3.36 10–11 3.19 10–4 6.42 20–11 5.74 18–8 5.24 17–1 4.85 15–10 4.54 14–9 4.28 13–11 4.06 13–3
8.36 27–3 7.48 24–4 6.83 22–3 6.32 20–7 5.91 19–3 5.57 18–2 5.29 17–3 5.50 17–11 4.92 16–0 4.49 14–7 4.15 13–6 3.89 12–8 3.66 11–11 3.48 11–4 7.01 22–10 6.27 20–5 5.72 18–7 5.30 17–3 4.95 16–1 4.67 15–2 4.43 14–5
Notes to Table 19 1. Spans apply only where the floors serve residential areas. 2. Spans are valid for glue-laminated timber conforming to CAN/CSA-O122-M and CAN/CSA-O177-M. 3. Spans are clear spans between supports. For total span, add two bearing lengths. 4. Provide a minimum bearing length of 89 mm (31⁄2 in.). 5. Top edge of beam assumed to be fully laterally supported by joists. 6. Supported length means half the sum of the joist spans on both sides of the beam. 7. Straight interpolation may be used for other supported lengths
Number of Floors Supported 2
Beam Width, mm (in.) 130 (5)
3
80 (3)
3
130 (5)
Maximum Span, m (ft.–in.)2 to 5 Beam Depth, mm (in.)
Supported Length, m6, 7 ft
228 9
266 101⁄2
304 12
342 131⁄2
380 15
418 161⁄2
456 18
2.4 8 3.0 10 3.6 12 4.2 14 4.8 16 5.4 18 6.0 20 2.4 8 3.0 10 3.6 12 4.2 14 4.8 16 5.4 18 6.0 20 2.4 8 3.0 10 3.6 12 4.2 14 4.8 16 5.4 18 6.0 20
4.18 13–7 3.74 12–2 3.41 11–1 3.16 10–3 2.96 9–7 2.79 9–1 2.64 8–7 2.75 8–11 2.46 8–0 2.24 7–4 2.08 6–9 1.94 6–4 1.83 6–0 1.74 5–8 3.50 11–5 3.13 10–2 2.86 9–4 2.65 8–7 2.48 8–1 2.34 7–7 2.22 7–3
4.88 15–10 4.36 14–2 3.98 13–0 3.69 12–0 3.45 11–3 3.25 10–7 3.08 10–0 3.21 10–5 2.87 9–4 2.62 8–6 2.42 7–11 2.27 7–5 2.14 6–11 2.03 6–7 4.09 13–4 3.66 11–11 3.34 10–10 3.09 10–1 2.89 9–5 2.72 8–10 2.58 8–5
5.57 18–2 4.99 16–3 4.55 14–10 4.21 13–9 3.94 12–10 3.72 12–1 3.53 11–6 3.66 11–11 3.28 10–8 2.99 9–9 2.77 9–0 2.59 8–5 2.44 7–11 2.32 7–7 4.67 15–2 4.18 13–7 3.81 12–5 3.53 11–6 3.30 10–9 3.11 10–2 2.95 9–7
6.27 20–5 5.61 18–3 5.12 16–8 4.74 15–5 4.43 14–5 4.18 13–7 3.97 12–11 4.12 13–5 3.69 12–0 3.37 10–11 3.12 10–2 2.91 9–6 2.75 8–11 2.61 8–6 5.25 17–1 4.70 15–4 4.29 14–0 3.97 12–11 3.72 12–1 3.50 11–5 3.32 10–10
6.97 22–8 6.23 20–3 5.69 18–6 5.27 17–2 4.93 16–0 4.64 15–1 4.41 14–4 4.58 14–11 4.10 13–4 3.74 12–2 3.46 11–3 3.24 10–6 3.05 9–11 2.90 9–5 5.84 19–0 5.22 17–0 4.77 15–6 4.41 14–4 4.13 13–5 3.89 12–8 3.69 12–0
7.66 24–11 6.85 22–4 6.26 20–4 5.79 18–10 5.42 17–8 5.11 16–8 4.85 15–9 5.04 16–5 4.51 14–8 4.11 13–5 3.81 12–5 3.56 11–7 3.36 10–11 3.19 10–4 6.42 20–11 5.74 18–8 5.24 17–1 4.85 15–10 4.54 14–9 4.28 13–11 4.06 13–3
8.36 27–3 7.48 24–4 6.83 22–3 6.32 20–7 5.91 19–3 5.57 18–2 5.29 17–3 5.50 17–11 4.92 16–0 4.49 14–7 4.15 13–6 3.89 12–8 3.66 11–11 3.48 11–4 7.01 22–10 6.27 20–5 5.72 18–7 5.30 17–3 4.95 16–1 4.67 15–2 4.43 14–5
Notes to Table 19 1. Spans apply only where the floors serve residential areas. 2. Spans are valid for glue-laminated timber conforming to CAN/CSA-O122-M and CAN/CSA-O177-M. 3. Spans are clear spans between supports. For total span, add two bearing lengths. 4. Provide a minimum bearing length of 89 mm (31⁄2 in.). 5. Top edge of beam assumed to be fully laterally supported by joists. 6. Supported length means half the sum of the joist spans on both sides of the beam. 7. Straight interpolation may be used for other supported lengths
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