Sectional Properties of Rectangular Hollow Section

QWER-87

progress

score

Calculate the cross-sectional area, moments of inertia, and section moduli for a rectangular hollow section (RHS) with an outer height of 24 cm, outer width of 17 cm, and wall thickness of 1 cm.

Cross-sectional area A, cm²

Moment of inertia about the horizontal centroidal axis I_x, cm⁴

Moment of inertia about the vertical centroidal axis I_y, cm⁴

Section modulus W_x, cm³

Section modulus W_y, cm³

This is a demonstration task — it isn't graded here. Add your own copy and it will appear under "My personal course" on the student page.

About this task

This task focuses on determining the geometric properties of a rectangular hollow section (RHS). Students calculate the cross-sectional area, centroidal moments of inertia about the principal axes, section moduli, and radii of gyration by subtracting the inner rectangle from the outer profile. The exercise develops practical skills in analyzing hollow structural sections, applying the subtraction method for composite areas, and evaluating section properties used in strength of materials, structural analysis, and steel design.