RHS 100x40x3 · Weight & Dimensions

BR — Rectangular Hollow Section

Rectangular Hollow Sections (RHS) are tubular profiles with excellent torsional resistance and aesthetic appeal. Used for columns, trusses, and exposed structural elements.

Also known as: PTR 100x40 cal 11 (México) · Caño estructural 100x40 (Argentina)

The RHS 100x40x3 steel profile weighs 6.1 kg/m (4.12 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 804 mm². Moment of inertia Ix = 98 cm⁴, Iy = 22.55 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	40 mm	1.57 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	6.1 kg/m	4.12 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	804 mm²	1.246 in²
Moment of inertia (Ix)	98 cm⁴	2.35 in⁴
Moment of inertia (Iy)	22.55 cm⁴	0.54 in⁴
Elastic section modulus (Sx)	19.6 cm³	1.196 in³
Elastic section modulus (Sy)	11.27 cm³	0.688 in³
Plastic section modulus (Zx)	24.89 cm³	1.519 in³
Plastic section modulus (Zy)	12.83 cm³	0.783 in³
Radius of gyration (rx)	3.49 cm	1.374 in
Radius of gyration (ry)	1.67 cm	0.657 in