RHS 80x70x3 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 11 (México) · Caño estructural 80x70 (Argentina)

The RHS 80x70x3 steel profile weighs 6.6 kg/m (4.44 lb/ft), has a depth of 80 mm (3.15 in), flange width 70 mm (2.76 in). Cross-sectional area: 840.823 mm². Moment of inertia Ix = 78.945 cm⁴, Iy = 64.265 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	70 mm	2.76 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	6.6 kg/m	4.44 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	840.82 mm²	1.303 in²
Moment of inertia (Ix)	78.94 cm⁴	1.90 in⁴
Moment of inertia (Iy)	64.26 cm⁴	1.54 in⁴
Elastic section modulus (Sx)	19.74 cm³	1.204 in³
Elastic section modulus (Sy)	18.36 cm³	1.120 in³
Plastic section modulus (Zx)	23.47 cm³	1.432 in³
Plastic section modulus (Zy)	21.43 cm³	1.307 in³
Radius of gyration (rx)	3.06 cm	1.206 in
Radius of gyration (ry)	2.76 cm	1.088 in