RHS 100x50x4.25 Tecnometal · Weight & Dimensions

Tecnometal, cold-formed sections (Brazil) · 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 100x50x4.25 steel profile weighs 9.1 kg/m (6.10 lb/ft), has a depth of 100 mm (3.94 in), flange width 50 mm (1.97 in). Cross-sectional area: 1,156.235 mm². Moment of inertia Ix = 140.485 cm⁴, Iy = 46.952 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.25 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)	4.3 mm	0.17 in
Fillet radius (r)	8.5 mm	0.33 in
Weight	9.1 kg/m	6.10 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,156.24 mm²	1.792 in²
Moment of inertia (Ix)	140.48 cm⁴	3.38 in⁴
Moment of inertia (Iy)	46.95 cm⁴	1.13 in⁴
Elastic section modulus (Sx)	28.1 cm³	1.715 in³
Elastic section modulus (Sy)	18.78 cm³	1.146 in³
Plastic section modulus (Zx)	35.85 cm³	2.188 in³
Plastic section modulus (Zy)	21.98 cm³	1.341 in³
Radius of gyration (rx)	3.49 cm	1.372 in
Radius of gyration (ry)	2.02 cm	0.793 in