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Calculate Required Beam Section Dimensions For Nominal Moment:
 
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)
 
 
     
Nominal moment on beam (*Mn - lb-ft or N-m)
*Nominal moment Mn = Factored moment Mu/0.9
Compressive strength of concrete (f'c - psi or kPa)
Steel yield strength (fy - psi or kPa)
   
Steel reinforcement ratio (p) =
Use p = 0.18f'c/fy to design an economical beam,
or
Enter a custom steel reinforcement ratio (p)
Value of d/b = x; where d = x(b)
A good choice is to keep the value of d/b between 1.5 and 2.5   

     
   
   
Output:
 
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Steel reinforcement ratio, p =
Beam dimensions, bd^2 =
Beam dimension, d =
Beam dimension, b =
Area of steel reinforcement, As =
   
 
 
 
 



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