Select
method A, B, or C:



f'c (ksi)

fy (ksi)

shape







Dimensions:









Reinforcement:

Number of bars

Bar size












Maximum allowable design (factored) load or capacity, Pu:





Dimensions:







Design (factored) load, Pu:




Required steel area:



Rebar choices:























Design (factored) load, Pu:






Assumed steel ratio:






Gross area corresponding to
steel ratio:











Checks:


errors:



A. Analysis of column



width or diameter must be > 0



length must be > 0



steel area must be < gross area



minimum 6 bars for spiral



minimum 4 bars for tied column



reinf ratio must be >= 0.01



reinf ratio must <= 0.08



no. bars in line must be <= total/2



total bars in rect. col. must be even



column too small  bar fit check no good



B. Col design with dimensions
assumed



width or diameter must be > 0



length must be > 0



design load must be > 0



C. Col design with steel
ratio assumed



design load must be > 0





