RHS 180x80x3 · Weight & Dimensions

BR — 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 180x80 cal 11 (México) · Caño estructural 180x80 (Argentina)

The RHS 180x80x3 steel profile weighs 11.6 kg/m (7.80 lb/ft), has a depth of 180 mm (7.09 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,524 mm². Moment of inertia Ix = 639.39 cm⁴, Iy = 180.43 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	180 mm	7.09 in
Width (b)	80 mm	3.15 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	11.6 kg/m	7.80 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,524 mm²	2.362 in²
Moment of inertia (Ix)	639.39 cm⁴	15.36 in⁴
Moment of inertia (Iy)	180.43 cm⁴	4.33 in⁴
Elastic section modulus (Sx)	71.04 cm³	4.335 in³
Elastic section modulus (Sy)	45.11 cm³	2.753 in³
Plastic section modulus (Zx)	87.89 cm³	5.363 in³
Plastic section modulus (Zy)	49.79 cm³	3.038 in³
Radius of gyration (rx)	6.48 cm	2.551 in
Radius of gyration (ry)	3.44 cm	1.354 in