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Table 19 Maximum spans for glue-laminated floor beams – 20f-E grade1
Number of Floors Supported 1
Beam Width, mm (in.) 80 (3)
1
130 (5)
2
80 (3)
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
4.32 14–1 3.87 12–7 3.53 11–6 3.27 10–8 3.06 9–11 2.88 9–5 2.73 8–11 5.51 17–11 4.93 16–0 4.50 14–8 4.16 13–7 3.90 12–8 3.67 11–11 3.48 11–4 3.28 10–8 2.93 9–7 2.68 8–9 2.48 8–1 2.32 7–7 2.19 7–1 2.07 6–9
5.04 16–5 4.51 14–8 4.12 13–5 3.81 12–5 3.57 11–7 3.36 10–11 3.19 10–5 6.43 20–11 5.75 18–9 5.25 17–1 4.86 15–10 4.54 14–10 4.28 13–11 4.07 13–3 3.83 12–5 3.42 11–2 3.12 10–2 2.89 9–5 2.71 8–10 2.55 8–4 2.42 7–11
5.76 18–9 5.15 16–9 4.70 15–4 4.36 14–2 4.07 13–3 3.84 12–6 3.64 11–10 7.35 23–11 6.57 21–5 6.00 19–6 5.55 18–1 5.19 16–11 4.90 15–11 4.65 15–1 4.37 14–3 3.91 12–9 3.57 11–7 3.31 10–9 3.09 10–1 2.91 9–6 2.77 9–0
6.48 21–1 5.80 18–10 5.29 17–3 4.90 15–11 4.58 14–11 4.32 14–1 4.10 13–4 8.26 26–11 7.39 24–1 6.75 22–0 6.25 20–4 5.84 19–0 5.51 17–11 5.23 17–0 4.92 16–0 4.40 14–4 4.02 13–1 3.72 12–1 3.48 11–4 3.28 10–8 3.11 10–2
7.20 23–5 6.44 21–0 5.88 19–2 5.44 17–9 5.09 16–7 4.80 15–8 4.56 14–10 9.18 29–11 8.21 26–9 7.50 24–5 6.94 22–7 6.49 21–2 6.12 19–11 5.81 18–11 5.47 17–9 4.89 15–11 4.46 14–6 4.13 13–5 3.86 12–7 3.64 11–10 3.46 11–3
7.92 25–9 7.09 23–1 6.47 21–1 5.99 19–6 5.60 18–3 5.28 17–2 5.01 16–4 10.10 32–11 9.03 29–5 8.25 26–10 7.64 24–10 7.14 23–3 6.73 21–11 6.39 20–10 6.01 19–7 5.38 17–6 4.91 16–0 4.54 14–10 4.25 13–10 4.01 13–1 3.80 12–5
8.64 28–2 7.73 25–2 7.06 23–0 6.53 21–3 6.11 19–11 5.76 18–9 5.47 17–10 11.02 35–10 9.86 32–1 9.00 29–3 8.33 27–1 7.79 25–4 7.35 23–11 6.97 22–8 6.56 21–4 5.87 19–1 5.36 17–5 4.96 16–2 4.64 15–1 4.37 14–3 4.15 13–6
Continued on p. 284