Universal Forest Products

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Where speed meets strength.
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.
Universal Forest Products Eastern Division, Inc. manufactures the Open Joist™ product as a licensee of Distribution Open Joist 2000, Inc.  All Open Joist product design and engineering calculations are created by the licensor, Distribution Open Joist 2000, Inc.