RHS 120x80x3.5 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 120x80 cal 11 (México) · Caño estructural 120x80 (Argentina)

The RHS 120x80x3.5 steel profile weighs 10.4 kg/m (6.96 lb/ft), has a depth of 120 mm (4.72 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,319.454 mm². Moment of inertia Ix = 263.132 cm⁴, Iy = 140.796 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	120 mm	4.72 in
Width (b)	80 mm	3.15 in
Thickness (t)	3.5 mm	0.14 in
Fillet radius (r)	7 mm	0.28 in
Weight	10.4 kg/m	6.96 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,319.45 mm²	2.045 in²
Moment of inertia (Ix)	263.13 cm⁴	6.32 in⁴
Moment of inertia (Iy)	140.8 cm⁴	3.38 in⁴
Elastic section modulus (Sx)	43.86 cm³	2.676 in³
Elastic section modulus (Sy)	35.2 cm³	2.148 in³
Plastic section modulus (Zx)	53.09 cm³	3.240 in³
Plastic section modulus (Zy)	40.21 cm³	2.454 in³
Radius of gyration (rx)	4.47 cm	1.758 in
Radius of gyration (ry)	3.27 cm	1.286 in