Structural Analysis

Section Property Calculator

A quick-reference tool for structural and rehabilitation engineers to calculate the geometric properties of common cross-section shapes — used for capacity checks, retrofit design, and preliminary analysis.

Width (b) (mm)

Height (h) (mm)

Section Properties

Area (A)

80,000 mm²

Moment of Inertia (Ixx)

1,066,666,667 mm⁴

Moment of Inertia (Iyy)

266,666,667 mm⁴

Section Modulus (Sxx)

5,333,333 mm³

Section Modulus (Syy)

2,666,667 mm³

Radius of Gyration (rx)

115.47 mm

Radius of Gyration (ry)

57.74 mm

Ixx / Sxx / rx are taken about the horizontal centroidal axis; Iyy / Syy / ry about the vertical centroidal axis. Assumes a doubly-symmetric, homogeneous section. For preliminary and educational use only — verify independently before use in design or assessment.