HOME 24" DOUBLE TEE
Composite with 2½" Concrete Topping (f'c = 4000 psi)
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24 inch Topped Double Tee X-Section

SECTION PROPERTIES
I  = 41627  in4 Ztc  = 8192  in3 Zif  = 8127  in3 Zbc  = 2205  in3
w  = 91  psf Ytc  = 7.62  in Yif  = 5.12  in Ybc  = 18.88  in


ALLOWABLE SUPERIMPOSED LOAD (in pounds per square foot)
SIMPLE SPAN (in feet)
Number of ½" Ø strands per tee 30 34 38 42 46 50 54 58 62 66 70            
6 (straight) 134 88 55 29                          
6 (harped) 149 99 64 38                          
8 (straight) 189 130 89 53 26                        
8 (harped) 218 153 107 73 42                        
10 (straight) 235 167 115 74 43 20                      
10 (harped) 283 203 148 105 69 42 20                    
12 (harped) 344 251 186 136 95 64 39                    
14 (harped) 402 296 222 166 120 84 57 34                  
16 (harped) 457 339 256 194 143 104 73 49 29                
18 (harped) 507 378 287 219 164 122 89 62 41 23              
20 (harped)   414 316 243 184 139 103 75 52 33              
22 (harped)       264 202 154 116 86 61 41 24            

NOTES:

  1. The standard top flange reinforcement is WWF 8x4-W2.9/W2.9, and the maximum safe uniform load on the flange with this reinforcement, without the topping, is 80 psf. The maximum safe concentrated load without the topping is 500 lbs.
  2. Interpolation between values shown is acceptable.  Do not extrapolate values into the blank spaces of the table.
  3. These Span-Load Tables are intended as an aid to preliminary sizing. Sound engineering judgement is required for the application of this information to specific design cases.
  4. Values in the lower left of the table in bold type represent conditions where shear reinforcement is required. See SHEAR in "Design Criteria..." for discussion.
  5. Values in the lower left of the table in bold red type represent conditions where (1) shear reinforcement is required and (2) top flange tension reinforcement is required in addition to the standard flange mesh.
  6. See "Design Criteria..." for definitions of HIGHLIGHTING. Highlighting not visible on printed copy (screen only).