Prestress Concrete
6187 Miami Lakes Dr.,  Miami Lakes, FL 33014 Tel. (305) 558-3515 Fax. (305) 558-8557
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LOAD SPAN TABLES

Joist Section Properties
A ln2 I ln4 Sb ln3 St ln3 Yb ln Yt ln Wt. p/f 8joist.gif (2436 bytes)
45.5 242.5     4.06 3.94 45.5

8" JOIST WITH 3" COMPOSITE SLAB (P.S.F.)

 

Joist Spacing

DESIGN SPAN (Feet)

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 System Weight (R.S.F.)
2'-6"     290 268 246 224 202 180 166 153 140 128 116 106 96 86 75 65 55
3'-6" 245 228 210 193 176 159 142 125 117 109 101 93 85 78 71 64 57 50 50
4'-6" 180 166 158 144 132 121 110 100 93 86 78 70 62 57 52 48     47
5'-6" 145 135 125 115 105 95 85 75 70 65 60 55 50           45
6'-6" 118 109 100 92 84 76 68 60 55 50 45               44

Joist Section Properties
A ln2 I ln4 Sb ln3 St ln3 Yb ln Yt ln Wt. p/f 12joist.gif (2954 bytes)
66.8 799.8     6.14 5.87 66.8

12" JOIST WITH 3" COMPOSITE SLAB (P.S.F.)

 
Joist Spacing

DESIGN SPAN (Feet)

20 22 24 26 28 30 31 32 33 34 35 36 37 38 39 40 42 44 System Weight (R.S.F.)
2'-6"         268 220 204 188 173 160 146 136 126 116 107 98 84 70 64
3'-6"       234 202 170 158 146 135 126 118 110 103 96 89 82 70 58 56
4'-6" 235 213 192 173 156 139 129 120 111 102 94 88 82 76 70 64 52   51
5'-6" 182 164 148 132 116 100 92 85 78 71 64 60 56 53 50 46     49
6'-6" 150 136 122 107 91 75 70 65 60 55 50 47 45           47

Joist Section Properties
A ln2 I ln4 Sb ln3 St ln3 Yb ln Yt ln Wt. p/f 16joist.gif (2933 bytes)
91.0 1936.3     8.23 7.77 91.0

16" JOIST WITH 3" COMPOSITE SLAB (P.S.F.)

 
Joist Spacing

DESIGN SPAN (Feet)

26 28 30 32 34 36 38 40 42 44 46 48 50 51 52 53 54 55 System Weight (R.S.F.)
3'-61/4"     282 253 222 196 172 150 132 116 100 88 76 71 66 61 56 52 63
4'-61/4"     212 190 170 150 132 114 102 90 80 70 60 58 56 54 52 50 57
5'-61/4" 200 184 168 150 132 115 101 87 77 67 59 54 50           54
6'-61/4" 166 152 138 122 107 93 80 68 60 52                 52

Joist Section Properties
A ln2 I ln4 Sb ln3 St ln3 Yb ln Yt ln Wt. p/f 24joist.gif (1605 bytes)
174.0 8322.2     12.42 11.58 174.0

24" JOIST WITH 4" COMPOSITE SLAB (P.S.F.)

Joist Spacing

DESIGN SPAN (Feet)

40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 System Weight (R.S.F.)
4'-8" 310 294 278 262 237 212 186 168 150 132 118 105 92 82 72 62 55 50 84
5'-8" 235 222 209 195 182 170 158 145 132 122 110 98 86 77 68 60 52 78
6'-8" 192 179 168 158 148 138 128 116 105 94 86 78 70 64 58 52 73
7'-8" 166 156 146 136 124 113 102 94 86 78 70 63 56 50 70
8'-8" 138 130 122 114 106 98 90 81 73 65 57 50 68

Joist Section Properties
A ln2 I ln4 Sb ln3 St ln3 Yb ln Yt ln Wt. p/f 28joist.gif (1635 bytes)
207.0 13459.0     14.55 13.45 206.0

28" JOIST WITH 4-3/4" COMPOSITE SLAB (P.S.F.)

 
Joist Spacing

DESIGN SPAN (Feet)

54 56 58 60 62 64 66 68 70 72 74 System Weight (R.S.F.)
4'-8" 230 218 198 178 162 148 137 119 109 97 88 92
5'-8" 215 180 162 146 131 117 105 94 86 76 68 86
6'-8" 165 148 128 119 104 95 84 73 67 60 53 81
7'-8" 135 120 108 93 86 76 68 59 52     78
8'-8" 115 103 90 78 70 62 54         76

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