RHS 120x80x5 GOST · Weight & Dimensions

GOST, 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 6 (México) · Caño estructural 120x80 (Argentina)

The RHS 120x80x5 steel profile weighs 14.4 kg/m (9.68 lb/ft), has a depth of 120 mm (4.72 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,835.619 mm². Moment of inertia Ix = 353.141 cm⁴, Iy = 187.775 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	120 mm	4.72 in
Width (b)	80 mm	3.15 in
Thickness (t)	5 mm	0.20 in
Fillet radius (r)	10 mm	0.39 in
Weight	14.4 kg/m	9.68 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,835.62 mm²	2.845 in²
Moment of inertia (Ix)	353.14 cm⁴	8.48 in⁴
Moment of inertia (Iy)	187.78 cm⁴	4.51 in⁴
Elastic section modulus (Sx)	58.86 cm³	3.592 in³
Elastic section modulus (Sy)	46.94 cm³	2.865 in³
Plastic section modulus (Zx)	72.45 cm³	4.421 in³
Plastic section modulus (Zy)	54.74 cm³	3.340 in³
Radius of gyration (rx)	4.39 cm	1.727 in
Radius of gyration (ry)	3.2 cm	1.259 in