RHS 70x40x2.5 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 70x40 cal 13 (México) · Caño estructural 70x40 (Argentina)

The RHS 70x40x2.5 steel profile weighs 4.0 kg/m (2.68 lb/ft), has a depth of 70 mm (2.76 in), flange width 40 mm (1.57 in). Cross-sectional area: 508.905 mm². Moment of inertia Ix = 32.316 cm⁴, Iy = 13.496 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 2.5 mm ≈ 12 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	70 mm	2.76 in
Width (b)	40 mm	1.57 in
Thickness (t)	2.5 mm	0.10 in
Fillet radius (r)	5 mm	0.20 in
Weight	4.0 kg/m	2.68 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	508.9 mm²	0.789 in²
Moment of inertia (Ix)	32.32 cm⁴	0.78 in⁴
Moment of inertia (Iy)	13.5 cm⁴	0.32 in⁴
Elastic section modulus (Sx)	9.23 cm³	0.563 in³
Elastic section modulus (Sy)	6.75 cm³	0.412 in³
Plastic section modulus (Zx)	11.48 cm³	0.700 in³
Plastic section modulus (Zy)	7.78 cm³	0.475 in³
Radius of gyration (rx)	2.52 cm	0.992 in
Radius of gyration (ry)	1.63 cm	0.641 in