Double Tees

double tee
Section Properties
Designation A (in.3) Yb (in.) Yt (in.) I (in.4) Sb (in.3) St (in.3) wt (plf)
10DT24 585 17.2 6.7 29548 1712 4382 604
10DT28 626 20.0 7.9 43489 5463 5453 652
10DT32 662 22.8 9.1 60033 2630 6544 690
10DT36 694 25.6 10.3 78840 3070 7640 723
Safe Superimposed Load Capacity (psf)
Desig. Strand ee(in) ec(in) 30 35 40 45 50 55 60 65 70 75 80 90
10DT24 8.8 6 2.8 263 170 115 72 45              
10DT24 10.8 7 3.0   231 159 109 70              
10DT24 12.8 8 3.3     200 142 99 65            
10DT24 14.8 9 3.5       160 110 75 50          
10DT24 16.8 10 3.8       177 126 88 59 37        
10DT24 18.8 11 4.0         135 97 67 44        
10DT24 20.8 12 4.3             73 50        
10DT28 10.8 9 3.0     195 135 95 66 43          
10DT28 12.8 8 3.3       177 128 95 63          
10DT28 14.8 9 3.5         15 112 78 52        
10DT28 16.8 10 3.8         170 125 90 63 41      
10DT28 18.8 11 4.0           135 100 71 49      
10DT28 20.8 12 4.3             108 79 56 37    
10DT28 22.8 13 4.5               85 61 42    
10DT32 8.8 9 3.0     232 166 118 84 57          
10DT32 12.8 10 3.3       210 155 114 82 58        
10DT32 14.8 11 3.5         190 140 103 73 50      
10DT32 16.8 10 3.8           160 120 87 63 42    
10DT32 18.8 11 4.0             132 98 72 51    
10DT32 20.8 12 4.3               106 80 58 40  
10DT36 10.8 9 3.0     190 140 100 70 49          
10DT36 12.8 10 3.3       183 137 101 74 52        
10DT36 14.8 11 3.5         170 130 95 70 47      
10DT36 16.8 12 3.8           147 110 81 59 40    
10DT36 18.8 13 4.0           16 122 92 68 48    
10DT36 20.8 14 4.3              101 76 56 39  
10DT36 22.8 15 4.5                83* 62 46  
10DT36 24.8 16 4.8                88* 67* 50 35

* Requires additional concrete strength at Transfer.

Notes:

Load Charts are intended for preliminary design only.
Max tension under full loading = 850 psi.
Design criteria ACI 318-02.
Concrete strength at 28 days (f`c) = 6000 psi.
Design charts assume simple span.
Loading is based on 3 in., 4000 psi composite topping.
Deflections must be checked according to design criteria