(6) Volume of Core: Tribars and Tetrapods . Volume per 100 m of 

 structure (1000 m ) is shown in the following tabulation: 



See Figure 8-27 for a graphic comparison of costs. 



(7) Cost Analysis : The following cost analysis will be assumed for 

 the illustrative purposes of this problem. Actual costs for particular 

 project would have to be based on the prevailing costs in the project area. 

 Costs will vary with location, time, and the availability of suitable 

 materials. Unit costs of concrete are shown in the tabulation below. 



w 



^ 3 

 (Ib/ft^) 



"r. 



(kN/m^) 



Cost 

 ($ per yd^) 



Cost 

 ($ per m^) 



150 

 160 

 170 



23.56 

 25.13 

 26.70 



60.00 

 63.00 

 82.50 



78.40 



82.40 



107.90 



8-65 



