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Compactness of Rectangular HSS For Compression:
 
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 B4.1a, Case 6:
This calculation applies to rectangular HSS.
     
Inside width of flange (b1 - in or mm)
Steel yield strength (fy - ksi or MPa)
Thickness of the flange (tf - in or mm)
   

     
   
   
Output:
 
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Width thickness ratio leg, WTF =TF =
Limiting slenderness for compact flange, WTFp =
Limiting slenderness for noncompact flange, WTFr =
Flange compact, noncompact or slender?
 
 
 



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