My Library

Table 43 Built-up beams for exterior decks (lumber not incised) Number and Size of Plys mm (in.)
D.Fir-L
Hem-Fir
S-P-F
Northern Species
Post Spacing m
2.4
2.7
3.0
3.3
3.7
4.3
ft.
8
9
10
11
12
14
1.2
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 184
4
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 8
1.8
1-38 x 184
1-38 x 184
1-38 x 235
1-38 x 235
1-38 x 235
2-38 x 184
6
1-2 x 8
1-2 x 8
1-2 x 10
1-2 x 10
1-2 x 10
2-2 x 8
2.4
2-38 x 184
2-38 x 184
2-38 x 184
2-38 x 184
2-38 x 235
2-38 x 235
8
2-2 x 8
2-2 x 8
2-2 x 8
2-2 x 8
2-2 x 10
2-2 x 10
1.2
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
4
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1.8
1-38 x 184
1-38 x 184
1-38 x 184
1-38 x 235
1-38 x 235
1-38 x 235
6
1-2 x 8
1-2 x 8
1-2 x 8
1-2 x 10
1-2 x 10
1-2 x 10
2.4
1-38 x 235
2-38 x 184
2-38 x 184
2-38 x 184
2-38 x 184
2-38 x 235
8
1-2 x 10
2-2 x 8
2-2 x 8
2-2 x 8
2-2 x 8
2-2 x 10
1.2
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 140
4
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 6
1.8
1-38 x 184
1-38 x 184
1-38 x 184
1-38 x 235
1-38 x 235
1-38 x 235
6
1-2 x 8
1-2 x 8
1-2 x 8
1-2 x 10
1-2 x 10
1-2 x 10
2.4
1-38 x 235
2-38 x 184
2-38 x 184
2-38 x 184
2-38 x 184
2-38 x 235
8
1-2 x 10
2-2 x 8
2-2 x 8
2-2 x 8
2-2 x 8
2-2 x 10
1.2
1-38 x 140
1-38 x 140
1-38 x 140
1-38 x 184
1-38 x 184
1-38 x 184
4
1-2 x 6
1-2 x 6
1-2 x 6
1-2 x 8
1-2 x 8
1-2 x 8
1.8
1-38 x 235
1-38 x 235
1-38 x 235
2-38 x 184
2-38 x 184
2-38 x 184
6
1-2 x 10
1-2 x 10
1-2 x 10
2-2 x 8
2-2 x 8
2-2 x 8
2.4
2-38 x 184
2-38 x 235
2-38 x 235
2-38 x 235
2-38 x 235
2-38 x 286
8
2-2 x 8
1-2 x 10
1-2 x 10
1-2 x 10
1-2 x 10
2-2 x 12
Joist Span
Continued on p. 311