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Compactness of Rectangular HSS in Flexure:
 
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)
AISC Table B4.1b, Case 19:
This calculation applies to rectangular HSS.
     
Inside height of web (h - in or mm)
Steel yield strength (fy - ksi or MPa)
Thickness of the web (t - in or mm)
   

     
   
   
Output:
 
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Width thickness ratio leg, WTW =
Limiting slenderness for compact web, WTWp =
Limiting slenderness for noncompact web, WTWr =
Web compact, noncompact or slender?
 
 
 



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