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Where speed meets strength.

L/480 Live Load Deflection, 15 lb. 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" 139 104 87 70 212 155 127 99 241 177 145 113 241 177 145 113
11'-1" 110 83 69 55 179 134 112 87 212 155 127 99 212 155 127 99
12'-1" 86 65 54 43 141 106 88 70 171 128 107 86 188 137 112 87
13'-1" 70 53 44 35 115 86 72 58 142 107 89 71 169 123 100 77
14'-1" 58 43 36 29 90 67 56 45 114 86 71 57 153 111 90 69
15'-1" 48 36 30 24 77 58 48 38 96 72 60 48 145 105 85 65
16'-1" 66 49 41 33 66 49 41 33 80 60 50 40 142 103 83 63
17'-1" 54 41 34 27 78 59 49 38 66 51 43 34 169 123 100 77
18'-1" 46 35 29 23 67 50 42 34 80 60 50 40 144 108 90 73
19'-1" 40 30 25 20 70 53 44 35 69 52 43 36 128 92 74 57
20'-1" 59 44 37 30 60 45 38 30 112 84 70 56
21'-1" 51 38 32 26 62 47 39 31 88 66 55 44
22'-1" 45 34 28 23 56 42 35 28 80 60 50 40
23'-1" 48 36 30 24 75 56 47 38
24'-1" 43 32 27 22 70 52 44 35
25'-1" 64 48 40 32
26'-1" 60 45 38 30
27'-1" 54 40 34 27
28'-1" 48 36 30 24
29'-1" 41 31 26 21
  • 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.