RHS 90x30x3 · 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 90x30 cal 11 (México) · Caño estructural 90x30 (Argentina)

The RHS 90x30x3 steel profile weighs 5.2 kg/m (3.49 lb/ft), has a depth of 90 mm (3.54 in), flange width 30 mm (1.18 in). Cross-sectional area: 684 mm². Moment of inertia Ix = 63.71 cm⁴, Iy = 10.57 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	90 mm	3.54 in
Width (b)	30 mm	1.18 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	5.2 kg/m	3.49 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	684 mm²	1.060 in²
Moment of inertia (Ix)	63.71 cm⁴	1.53 in⁴
Moment of inertia (Iy)	10.57 cm⁴	0.25 in⁴
Elastic section modulus (Sx)	14.16 cm³	0.864 in³
Elastic section modulus (Sy)	7.05 cm³	0.430 in³
Plastic section modulus (Zx)	18.41 cm³	1.123 in³
Plastic section modulus (Zy)	8.15 cm³	0.497 in³
Radius of gyration (rx)	3.05 cm	1.201 in
Radius of gyration (ry)	1.24 cm	0.488 in