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