Section Classification Calculator

Classify a symmetric I/H section's flange and web under bending or axial compression, per AISC 360 Table B4.1. Carries dimensions forward from the Section Property calculator if you arrived here via "Continue with these values", or enter them fresh below.

Flexure vs compression use different category systems: under flexure, elements are classified Compact / Noncompact / Slender. Under axial compression, they're classified Nonslender / Slender only - there's no "compact" category for a pure compression element in AISC 360. Pick the check type that matches how this member is actually loaded.

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 cad-steel.com accepts no responsibility for its use in any final design.