CHCalcHandbook

Rectangle — Solid and Box Section

Section Properties · Rectangle & Hollow Rectangle (Box) · A, C, I, S, r, Z, J
1

Geometry

Width b, height h; wall thickness t for the box section
Axes: x horizontal, y vertical; both pass through the centroid. The section is symmetric, so Ixy = 0.
2

Geometric properties

Area, centroid, moment of inertia, elastic section modulus, radius of gyration
3

Plastic modulus and torsion

Zx, Zy, shape factor, J
4

Principal axes

Ixy, θ, I₁, I₂