RHS 100x80x3 · 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 100x80 cal 11 (México) · Caño estructural 100x80 (Argentina)

The RHS 100x80x3 steel profile weighs 8.0 kg/m (5.34 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,044 mm². Moment of inertia Ix = 154.47 cm⁴, Iy = 109.24 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	80 mm	3.15 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	8.0 kg/m	5.34 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,044 mm²	1.618 in²
Moment of inertia (Ix)	154.47 cm⁴	3.71 in⁴
Moment of inertia (Iy)	109.24 cm⁴	2.62 in⁴
Elastic section modulus (Sx)	30.89 cm³	1.885 in³
Elastic section modulus (Sy)	27.31 cm³	1.667 in³
Plastic section modulus (Zx)	36.53 cm³	2.229 in³
Plastic section modulus (Zy)	31.31 cm³	1.911 in³
Radius of gyration (rx)	3.85 cm	1.516 in
Radius of gyration (ry)	3.23 cm	1.272 in