RHS 100x50x4 · Weight & Dimensions

EN — 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 100x50 cal 8 (México) · Caño estructural 100x50 (Argentina)

The RHS 100x50x4 steel profile weighs 8.6 kg/m (5.77 lb/ft), has a depth of 100 mm (3.94 in), flange width 50 mm (1.97 in). Cross-sectional area: 1,136 mm². Moment of inertia Ix = 144.13 cm⁴, Iy = 47.37 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	50 mm	1.97 in
Thickness (t)	4 mm	0.16 in
Fillet radius (r)	8 mm	0.31 in
Weight	8.6 kg/m	5.77 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,136 mm²	1.761 in²
Moment of inertia (Ix)	144.13 cm⁴	3.46 in⁴
Moment of inertia (Iy)	47.37 cm⁴	1.14 in⁴
Elastic section modulus (Sx)	28.83 cm³	1.759 in³
Elastic section modulus (Sy)	18.95 cm³	1.156 in³
Plastic section modulus (Zx)	36.13 cm³	2.205 in³
Plastic section modulus (Zy)	21.93 cm³	1.338 in³
Radius of gyration (rx)	3.56 cm	1.402 in
Radius of gyration (ry)	2.04 cm	0.803 in