RHS 70x50x3 · 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 70x50 cal 11 (México) · Caño estructural 70x50 (Argentina)

The RHS 70x50x3 steel profile weighs 5.2 kg/m (3.49 lb/ft), has a depth of 70 mm (2.76 in), flange width 50 mm (1.97 in). Cross-sectional area: 684 mm². Moment of inertia Ix = 46.8 cm⁴, Iy = 27.49 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	70 mm	2.76 in
Width (b)	50 mm	1.97 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	5.2 kg/m	3.49 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	684 mm²	1.060 in²
Moment of inertia (Ix)	46.8 cm⁴	1.12 in⁴
Moment of inertia (Iy)	27.49 cm⁴	0.66 in⁴
Elastic section modulus (Sx)	13.37 cm³	0.816 in³
Elastic section modulus (Sy)	10.99 cm³	0.671 in³
Plastic section modulus (Zx)	16.19 cm³	0.988 in³
Plastic section modulus (Zy)	12.77 cm³	0.779 in³
Radius of gyration (rx)	2.62 cm	1.031 in
Radius of gyration (ry)	2 cm	0.787 in