RHS 80x70x2.5 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 80x70 cal 13 (México) · Caño estructural 80x70 (Argentina)

The RHS 80x70x2.5 steel profile weighs 5.6 kg/m (3.74 lb/ft), has a depth of 80 mm (3.15 in), flange width 70 mm (2.76 in). Cross-sectional area: 708.905 mm². Moment of inertia Ix = 67.637 cm⁴, Iy = 55.108 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	70 mm	2.76 in
Thickness (t)	2.5 mm	0.10 in
Fillet radius (r)	5 mm	0.20 in
Weight	5.6 kg/m	3.74 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	708.9 mm²	1.099 in²
Moment of inertia (Ix)	67.64 cm⁴	1.62 in⁴
Moment of inertia (Iy)	55.11 cm⁴	1.32 in⁴
Elastic section modulus (Sx)	16.91 cm³	1.032 in³
Elastic section modulus (Sy)	15.75 cm³	0.961 in³
Plastic section modulus (Zx)	19.96 cm³	1.218 in³
Plastic section modulus (Zy)	18.23 cm³	1.112 in³
Radius of gyration (rx)	3.09 cm	1.216 in
Radius of gyration (ry)	2.79 cm	1.098 in