Axial-flexural capacity of short column

The calculation below provides the bending capacity (PM) of a rectangular short column

Input:

psi
ksi
in
in

tip: You can drag the verts to different spots. Changing 'nb' will reset it.

Output:

  1. Definitions
    • ϕc = Resistance factor for concrete
    • ϕs = Resistance factor for reinforcing steel
    • fc = Specified concrete strength (psi)
    • fy = Specified reinforcing steel yield strength (ksi)
    • b = Effective width of cross section (in)
    • h = Overall depth of cross section (in)
    • nb = Quantity of reinforcing bars
  2. Properties
    • Gross Area: 360 in²
    • Steel Area: 4.65 in²
    • Concrete Area: 355.4 in²
    • Reinforcing Ratio: 0.0129
    • Ix: 27000 in⁴
    • Iy: 4320 in⁴
    • Pmin: -929 kip
    • Pmax: 237 kip

Notes: