Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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Equivalent
Uniform
Load lb
per ft
Douglas Fir #2 or Southern Pine #2 Continuous over 2 or
3 Supports (1 or 2 Spans) Nominal Size Lumber
Douglas Fir #2 or Southern Pine #2 Continuous over 4 or
more Supports (3 or more Spans) Nominal Size of Lumber
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2 ë 4 2 ë 6 2 ë 8 2 ë 10 4 ë 4 4 ë 6 4 ë 8 2 ë 4 2 ë 6 2 ë 8 2 ë 10 4 ë 4 4 ë 6 4 ë 8
200 48 73 92 113 64 97 120 56 81 103 126 78 114 140
400 35 52 65 80 50 79 101 39 58 73 89 60 88 116
600 29 42 53 65 44 64 85 32 47 60 73 49 72 95
800 25 36 46 56 38 56 72 26 41 52 63 43 62 82
1000 22 33 41 50 34 50 66 22 35 46 56 38 56 73
1200 19 30 38 46 31 45 60 20 31 41 51 35 51 67
1400 18 28 35 43 29 42 55 18 28 37 47 32 47 62
1600 16 25 33 40 27 39 52 17 26 34 44 29 44 58
1800 15 24 31 38 25 37 49 16 24 32 41 27 42 55
2000 14 23 29 36 24 35 46 15 23 30 39 25 39 52
2200 14 22 28 34 23 34 44 14 22 29 37 23 37 48
2400 13 21 27 33 21 32 42 13 21 28 35 22 34 45
2600 13 20 26 31 20 31 41 13 20 27 34 21 33 43
2800 12 19 25 30 19 30 39 12 20 26 33 20 31 41
3000 12 19 24 29 18 29 38 12 19 25 32 19 30 39
3200 12 18 23 28 18 28 37 12 19 24 31 18 29 38
67
TABLE 4-17 Maximum Spans, in Inches, for Lumber Framing Using Douglas-Fir No. 2 or Southern Pine No. 2
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