composite column

CFST Design Calculator with Slenderness Effect

Input Data

Tube Shape	Circular Square Rectangular
Steel Thickness, t (mm)
Steel Yield Strength, $f_y$ (MPa)
Concrete Compressive Strength, $f_c$ (MPa)
Outer Diameter / Side, D or B (mm)
Height, H (mm)
Column Length, L (mm)
Effective Length Factor, K
Service Load Factor (Steel)
Service Load Factor (Concrete)

Design Steps

Cross-Section Diagram (Proportional with Dimensions)