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Allowable Uniform Live Load Tables

Allowable live loads, shown in pounds per square foot (PSF), are shown on these tables for the four common on-center spacing options and for various truss clear spans. The tables show allowable loads for all four available truss depths.

L/360 Deflection, 15lb. Dead Load
Values shown are in pounds per square foot (psf)
Clear Span 9-1/4" Depth
o.c.. Spacing
11-7/8" Depth
o.c. Spacing
14" Depth
o.c. Spacing
16" Depth
o.c. Spacing
12" 16" 19.2" 24" 12" 16" 19.2" 24" 12" 16" 19.2" 24" 12" 16" 19.2" 24"
10'-1" 183 134 109 84 212 155 127 99 241 177 145 113 241 177 145 113
11'-1" 147 110 92 73 188 137 112 87 212 155 127 99 212 155 127 99
12'-1" 115 86 72 58 164 119 97 75 188 137 112 87 188 137 112 87
13'-1" 94 71 59 47 145 105 85 65 169 123 100 77 169 123 100 77
14'-1" 77 58 48 38 120 90 75 57 137 99 80 61 153 111 90 69
15'-1" 64 48 40 32 102 77 64 49 128 93 75 57 145 105 85 65
16'-1" 86 65 54 43 88 66 55 43 105 75 60 45 142 103 83 63
17'-1" 72 54 45 36 91 65 51 38 90 64 51 38 169 123 100 77
18'-1" 61 46 38 30 84 59 47 35 99 71 56 42 161 117 95 73
19'-1" 53 40 33 26 92 65 52 39 88 62 49 37 128 92 74 57
20'-1" 78 59 49 38 80 56 44 33 148 107 87 67
21'-1" 67 50 42 34 83 62 51 38 121 87 70 53
22'-1" 59 44 37 30 74 56 44 33 127 91 74 56
23'-1" 64 48 40 29 104 78 65 52
24'-1" 58 43 36 29 96 72 60 47
25'-1" 83 62 52 42
26'-1" 83 62 52 42
27'-1" 75 56 47 38
28'-1" 64 48 40 32
29'-1" 56 42 35 28
  • Consult Open Joist™ Engineering for allowable loads at clear span ranges not shown.
  • Special Engineering Note: Open Joist trusses may be manufactured with components that provide increased structural values that may exceed the performance levels indicated in these charts.