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Calculate Spiral Pitch For a Short Spiral Column With Small Eccentricity:
 
Calculation:
Designer/Checker:
   
Input:  
   
 
(Note: All input Metric units are converted to English units for the equations below and then the output English units are converted back to Metric)
 
 
     
Spiral wire area (Asp - sq in or sq cm)
Spiral reinforcement ratio (ps)
Diameter of the column core (Dc - in or cm)

     
   
   
Output:
 
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Spiral pitch, s =
   
 
 
 
 



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