RHS 70x50x3.5 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 70x50 cal 11 (México) · Caño estructural 70x50 (Argentina)

The RHS 70x50x3.5 steel profile weighs 6.0 kg/m (4.01 lb/ft), has a depth of 70 mm (2.76 in), flange width 50 mm (1.97 in). Cross-sectional area: 759.454 mm². Moment of inertia Ix = 49.599 cm⁴, Iy = 29.31 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.5 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	70 mm	2.76 in
Width (b)	50 mm	1.97 in
Thickness (t)	3.5 mm	0.14 in
Fillet radius (r)	7 mm	0.28 in
Weight	6.0 kg/m	4.01 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	759.45 mm²	1.177 in²
Moment of inertia (Ix)	49.6 cm⁴	1.19 in⁴
Moment of inertia (Iy)	29.31 cm⁴	0.70 in⁴
Elastic section modulus (Sx)	14.17 cm³	0.865 in³
Elastic section modulus (Sy)	11.72 cm³	0.715 in³
Plastic section modulus (Zx)	17.5 cm³	1.068 in³
Plastic section modulus (Zy)	13.86 cm³	0.846 in³
Radius of gyration (rx)	2.56 cm	1.006 in
Radius of gyration (ry)	1.96 cm	0.773 in