RHS 70x20x3 Hiasa · Weight & Dimensions

Hiasa, cold-formed sections · 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 70x20 cal 11 (México) · Caño estructural 70x20 (Argentina)

The RHS 70x20x3 steel profile weighs 3.8 kg/m (2.53 lb/ft), has a depth of 70 mm (2.76 in), flange width 20 mm (0.79 in). Cross-sectional area: 480.823 mm². Moment of inertia Ix = 23.837 cm⁴, Iy = 2.999 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)	20 mm	0.79 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	3.8 kg/m	2.53 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	480.82 mm²	0.745 in²
Moment of inertia (Ix)	23.84 cm⁴	0.57 in⁴
Moment of inertia (Iy)	3 cm⁴	0.07 in⁴
Elastic section modulus (Sx)	6.81 cm³	0.416 in³
Elastic section modulus (Sy)	3 cm³	0.183 in³
Plastic section modulus (Zx)	9.37 cm³	0.572 in³
Plastic section modulus (Zy)	3.65 cm³	0.222 in³
Radius of gyration (rx)	2.23 cm	0.877 in
Radius of gyration (ry)	0.79 cm	0.311 in