RHS 120x100x4 · 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 120x100 cal 8 (México) · Caño estructural 120x100 (Argentina)

The RHS 120x100x4 steel profile weighs 12.9 kg/m (8.67 lb/ft), has a depth of 120 mm (4.72 in), flange width 100 mm (3.94 in). Cross-sectional area: 1,696 mm². Moment of inertia Ix = 362.89 cm⁴, Iy = 273.22 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	120 mm	4.72 in
Width (b)	100 mm	3.94 in
Thickness (t)	4 mm	0.16 in
Fillet radius (r)	8 mm	0.31 in
Weight	12.9 kg/m	8.67 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,696 mm²	2.629 in²
Moment of inertia (Ix)	362.89 cm⁴	8.72 in⁴
Moment of inertia (Iy)	273.22 cm⁴	6.56 in⁴
Elastic section modulus (Sx)	60.48 cm³	3.691 in³
Elastic section modulus (Sy)	54.64 cm³	3.334 in³
Plastic section modulus (Zx)	71.49 cm³	4.363 in³
Plastic section modulus (Zy)	63.01 cm³	3.845 in³
Radius of gyration (rx)	4.63 cm	1.823 in
Radius of gyration (ry)	4.01 cm	1.579 in