Section Property Calculator

Enter the outside dimensions of a symmetric I/H (W-shape) section to get its geometric properties: area, second moment of area, elastic and plastic section moduli, and radius of gyration, about both axes.

What this computes:Area (A) · second moment of area (Ix, Iy) · elastic section modulus (Sx, Sy) · plastic section modulus (Zx, Zy) · radius of gyration (rx, ry). Standard geometry, code-independent.
Note on accuracy: this tool models an idealised section with sharp (unfilleted) corners. Against the CISC published (filleted) section-table values, strong-axis properties (A, Ix, Sx, Zx) run about 1-2% low - the root fillets that CISC includes - while weak-axis properties are nearly exact. Adequate for preliminary work; use the CISC Handbook / SST tables for catalogued shapes.
Section dimensions
This calculator provides preliminary, indicative structural calculations only, intended to assist with initial sizing and understanding. It is not a substitute for assessment by a qualified structural engineer, and ca.cad-steel.com accepts no responsibility for its use in any final design.