Description
145 PCF Biform Decking for Normal Weight Concrete
Type “BI” inverted form deck is used when the spans and loads exceed the capability of standard and heavy duty form decks.
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Section Properties and Flexural Resistance (Fy = 40 ksi)
Gage Design Thickness Weight (psf) As(In2) Ip(In4) In(In4) Sp(In3) Sn(In3) Allowable Moment Mp/Ω inch-lbs Allowable Moment Mn/Ω inch-lbs Allowable Shear Vn/Ω lbs
22 0.0295 1.61 0.485 0.1833 0.1500 0.1796 0.1744 4300 4177 2243
20 0.0358 2.04 0.588 0.2267 0.1933 0.2309 0.2228 5533 5337 2714
18 0.0474 2.70 0.778 0.3000 0.2833 0.3147 0.0307 7540 7270 3572
16 0.0598 3.20 0.982 0.3800 0.3800 0.3957 0.3900 9477 9340 4479
Notes: 1. All section properties and strengths are reported per foot of panel width. 2. All section properties and ASD flexural strengths are calculated in accordance with ANSI/SDI C-2011, Section 2.4.A.1; p = Property in positive bending; n = Property in negative bending. 3. Moments of Inertia are calculated at 0.60Fy.
Allowable Superimposed Load (ASD)
Clear Span (ft. – in.)
Slab Thickness Gage 5’-0” 5’-6” 6’-0” 6’-6” 7’-0” 7’-6” 8’-0” 8’-6” 9’-0” 9’-6” 10’-0” 10’-6” 11’-0”
3-1/2”
(t=2.00)
36 PSF22 378 370 254 213 180 153 131 113 98 85 74 65 57
3-1/2”
(t=2.00)
36 PSF20 400 371 306 257 218 186 160 139 121 106 93 82 72
3-1/2”
(t=2.00)
36 PSF18 400 360 308 258 219 187 161 140 122 107 94 82 73
3-1/2”
(t=2.00)
36 PSF16 400 390 298 250 212 181 156 135 117 103 90 79 70
4”
(t=2.50)
44 PSF22 400 400 322 270 228 194 167 144 125 109 95 83 73
4”
(t=2.50)
44 PSF20 400 400 388 326 277 237 204 177 154 135 119 105 92
4”
(t=2.50)
44 PSF18 400 400 392 329 279 239 206 179 156 137 120 106 93
4”
(t=2.50)
44 PSF16 400 400 380 319 271 232 200 173 151 132 116 102 90
4-1/2”
(t=3.00)
50 PSF22 400 400 395 331 280 239 206 178 155 135 118 104 91
4-1/2”
(t=3.00)
50 PSF20 400 400 400 400 340 292 252 219 191 168 148 130 116
4-1/2”
(t=3.00)
50 PSF18 400 400 400 400 345 295 255 222 194 170 150 132 117
4-1/2”
(t=3.00)
50 PSF16 400 400 400 395 335 287 248 215 188 165 145 128 113
5”
(t=3.50)
56 PSF22 400 400 400 395 335 286 246 213 186 162 142 125 110
5”
(t=3.50)
56 PSF20 400 400 400 400 400 349 301 262 229 201 178 157 140
5”
(t=3.50)
56 PSF18 400 400 400 400 400 354 306 266 233 205 181 160 142
5”
(t=3.50)
56 PSF16 400 400 400 400 400 345 298 260 227 199 176 156 138
5-1/2”
(t=4.00)
62 PSF22 400 400 400 400 390 334 288 250 218 190 167 147 130
5-1/2”
(t=4.00)
62 PSF20 400 400 400 400 400 400 352 306 268 236 209 185 164
5-1/2”
(t=4.00)
62 PSF18 400 400 400 400 400 400 359 312 274 241 213 189 168
5-1/2”
(t=4.00)
62 PSF16 400 400 400 400 400 400 350 305 267 235 208 184 163
6”
(t=4.50)
68 PSF22 400 400 400 400 400 382 330 286 250 219 193 170 150
6”
(t=4.50)
68 PSF20 400 400 400 400 400 400 400 352 308 271 240 213 189
6”
(t=4.50)
68 PSF18 400 400 400 400 400 400 400 359 315 277 245 218 194
6”
(t=4.50)
68 PSF16 400 400 400 400 400 400 400 352 308 271 240 213 190
Notes: 1. All construction load spans are calculated using loads and load combinations in accordance with ANSI/SDI C-2011, Section 2.4.A. The 20 psf uniform load is the minimum required construction load. Specific construction operations may require greater construction loads. 2. Bending Moment and Deflection formulae are in accordance with ANSI/SDI C-2011, Appendix A
Construction Span Table (Fy = 40ksi) – 20 psf Construction Load
Normal Weight Concrete (145 pcf)
Total Slab Depth Gage 1 Span SDI Maximum Unshored Clear Span 2 Span SDI Maximum Unshored Clear Span 3 Span SDI Maximum Unshored Clear Span Cantilever Span
3-1/2”
(t=2.00)
36 PSF22 5’-8” 6’-8” 6’-8” 1’-11”
3-1/2”
(t=2.00)
36 PSF20 6’-9” 7’-11” 8’-0” 2’-4”
3-1/2”
(t=2.00)
36 PSF18 8’-4 9’-4” 9’-7” 3’-0”
3-1/2”
(t=2.00)
36 PSF16 9’-9” 10’-7” 10’-11” 3’-7”
4”
(t=2.50)
44 PSF22 5’-4” 6’-3” 6’-4” 1’-11”
4”
(t=2.50)
44 PSF20 6’-4” 7’-5” 7’-6” 2’-3”
4”
(t=2.50)
44 PSF18 7’-10” 8’-8” 9’-0” 2’-10”
4”
(t=2.50)
44 PSF16 9’-1” 9’-10” 10’-2” 3’-5”
4-1/2”
(t=3.00)
50 PSF22 5’-2” 6’-0” 6’-1” 1’-9”
4-1/2”
(t=3.00)
50 PSF20 6’-1” 7’-2” 7’-2” 2’-2”
4-1/2”
(t=3.00)
50 PSF18 7’-6” 8’-4” 8’-7” 2’-9”
4-1/2”
(t=3.00)
50 PSF16 8’-8” 9’-5” 9’-9” 3’-4”
5”
(t=3.50)
56 PSF22 5’-0” 5’-10” 5’-10” 1’-9”
5”
(t=3.50)
56 PSF20 5’-10” 6’-10” 6’-11” 2’-1”
5”
(t=3.50)
56 PSF18 7’-2” 8’-0” 8’-3 2’-8”
5”
(t=3.50)
56 PSF16 8’-3” 9’-1” 9’-4” 3’-3”
5-1/2”
(t=4.00)
62 PSF22 4’-10” 5’-7” 5’-8” 1’-9”
5-1/2”
(t=4.00)
62 PSF20 5’-8” 6’-7” 6’-8” 2’-1”
5-1/2”
(t=4.00)
62 PSF18 6’-11” 7’-8” 7’-11” 2’-7”
5-1/2”
(t=4.00)
62 PSF16 8’-0” 8’-9” 9’-0” 3’-2”
6”
(t=4.50)
68 PSF22 4’-8” 5’-5” 5’-6” 1’-8”
6”
(t=4.50)
68 PSF20 5’-6” 6’-4” 6’-5” 2’-0”
6”
(t=4.50)
68 PSF18 6’-8” 7’-5” 7’-8” 2’-7”
6”
(t=4.50)
68 PSF16 7’-8” 8’-5” 8’-8” 3’-1”
7”
(t=5.50)
80 PSF22 4’-5” 5’-2” 5’-2” 1’-7”
7”
(t=5.50)
80 PSF20 5’-2” 6’-0” 6’-1” 1’-11”
7”
(t=5.50)
80 PSF18 6’-3” 7’-0” 7’-2” 2’-5”
7”
(t=5.50)
80 PSF16 7’-2” 7’-11” 8’-2” 2’-11”
Construction Span Table (Fy = 40ksi) – 20 psf Construction Load
Lightweight Concrete (115 pcf)
Total Slab Depth Gage 1 Span SDI Maximum Unshored Clear Span 2 Span SDI Maximum Unshored Clear Span 3 Span SDI Maximum Unshored Clear Span Cantilever Span SDI Maximum Unshored Clear Span
3-1/2”
(t=2.00)
30 PSF22 6’-0” 7’-1” 7’-1” 1’-11”
3-1/2”
(t=2.00)
30 PSF20 7’-2” 8’-5” 8’-5” 2’-5”
3-1/2”
(t=2.00)
30 PSF18 8’-11” 9’-10” 10’-2” 3’-1”
3-1/2”
(t=2.00)
30 PSF16 10’-4” 11’-2” 11’-6” 3’-9”
4”
(t=2.50)
34 PSF22 5’-9” 6’-10” 6’-10” 1’-11”
4”
(t=2.50)
34 PSF20 6’-11” 8’-1” 8’-2” 2’-4”
4”
(t=2.50)
34 PSF18 8’-6” 9’-6” 9’-10” 3’-0”
4”
(t=2.50)
34 PSF16 9’-11” 10’-9” 11’-1” 3’-8”
4-1/2”
(t=3.00)
39 PSF22 5’-7” 6’-6” 6’-7” 1’-10”
4-1/2”
(t=3.00)
39 PSF20 6’-7” 7’-9” 7’-9” 2’-3”
4-1/2”
(t=3.00)
39 PSF18 8’-2” 9’-1” 9’-4” 2’-11”
4-1/2”
(t=3.00)
39 PSF16 9’-5” 10’-3” 10’-7” 3’-7”
5”
(t=3.50)
43 PSF22 5’-5” 6’-4” 6’-4” 1’-11”
5”
(t=3.50)
43 PSF20 6’-5” 7’-6” 7’-6” 2’-4”
5”
(t=3.50)
43 PSF18 7’-10” 8’-9” 9’-1” 3’-0”
5”
(t=3.50)
43 PSF16 9’-2” 9’-11” 10’-3” 3’-6”
5-1/2”
(t=4.00)
44 PSF22 5’-3” 6’-1” 6’-2” 1’-10”
5-1/2”
(t=4.00)
44 PSF20 6’-2” 7’-3” 7’-3” 2’-2”
5-1/2”
(t=4.00)
44 PSF18 7’-7” 8’-5” 8’-9” 2’-10”
5-1/2”
(t=4.00)
44 PSF16 8’-9” 9’-7” 9’-11” 3’-4”
6”
(t=4.50)
52 PSF22 5’-1” 5’-11” 6’-0” 1’-9”
6”
(t=4.50)
52 PSF20 6’-0” 7’-0" 7’-1” 2’-2”
6”
(t=4.50)
52 PSF18 7’-4” 8’-2” 8’-6” 2’-9”
6”
(t=4.50)
52 PSF16 8’-6” 9’-4” 9’-7” 3’-4”
7”
(t=5.50)
61 PSF22 4’-10” 5’-8” 5’-8” 1’-9”
7”
(t=5.50)
61 PSF20 5’-8” 6’-8” 6’-8” 2’-1”
7”
(t=5.50)
61 PSF18 6’-11” 7’-9” 8’-0” 2’-8”
7”
(t=5.50)
61 PSF16 8’-0” 8’-9” 9’-1” 3’-2”
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