RHS 40x20x2 · Weight & Dimensions

EN — 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 40x20 cal 15 (México) · Caño estructural 40x20 (Argentina)

The RHS 40x20x2 steel profile weighs 1.7 kg/m (1.13 lb/ft), has a depth of 40 mm (1.57 in), flange width 20 mm (0.79 in). Cross-sectional area: 224 mm². Moment of inertia Ix = 4.45 cm⁴, Iy = 1.44 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 2 mm ≈ 14 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 in
Width (b)	20 mm	0.79 in
Thickness (t)	2 mm	0.08 in
Fillet radius (r)	4 mm	0.16 in
Weight	1.7 kg/m	1.13 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	224 mm²	0.347 in²
Moment of inertia (Ix)	4.45 cm⁴	0.11 in⁴
Moment of inertia (Iy)	1.44 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	2.22 cm³	0.135 in³
Elastic section modulus (Sy)	1.44 cm³	0.088 in³
Plastic section modulus (Zx)	2.82 cm³	0.172 in³
Plastic section modulus (Zy)	1.7 cm³	0.104 in³
Radius of gyration (rx)	1.41 cm	0.555 in
Radius of gyration (ry)	0.8 cm	0.315 in