RHS 50x20x3 · 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 50x20 cal 11 (México) · Caño estructural 50x20 (Argentina)

The RHS 50x20x3 steel profile weighs 2.9 kg/m (1.92 lb/ft), has a depth of 50 mm (1.97 in), flange width 20 mm (0.79 in). Cross-sectional area: 384 mm². Moment of inertia Ix = 10.9 cm⁴, Iy = 2.33 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	50 mm	1.97 in
Width (b)	20 mm	0.79 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	2.9 kg/m	1.92 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	384 mm²	0.595 in²
Moment of inertia (Ix)	10.9 cm⁴	0.26 in⁴
Moment of inertia (Iy)	2.33 cm⁴	0.06 in⁴
Elastic section modulus (Sx)	4.36 cm³	0.266 in³
Elastic section modulus (Sy)	2.33 cm³	0.142 in³
Plastic section modulus (Zx)	5.72 cm³	0.349 in³
Plastic section modulus (Zy)	2.84 cm³	0.173 in³
Radius of gyration (rx)	1.68 cm	0.661 in
Radius of gyration (ry)	0.78 cm	0.307 in