Column Properties (SI)

Materials

Concrete $f'_c$ (MPa)

Steel $f_y$ (MPa)

Geometry

Width $b$ (mm)

Depth $h$ (mm)

Cover (mm)

Tie $\phi$ (mm)

Slenderness Check

Clear Height $l_u$ (m)

Factor $k$

Reinforcement

Longitudinal Bar Size

Bars $n_x$ (Width)

Bars $n_y$ (Depth)

Applied Loads

Axial Load $P_n$ (kN)

$M_{nx}$ (kN·m)

$M_{ny}$ (kN·m)

Biaxial Bending Short Columns

Generate $P_n-M_n$ interaction points and verify short column behavior for rectangular tied columns based on ACI 318M-11.

Black dots: Bars | Red line: Ties
Annotations verify code spacing

Click "Generate Diagram" to see results.