RHS 50x20x1 Hiasa · Weight & Dimensions

Hiasa, cold-formed sections · 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 50x20 cal 18 (México) · Caño estructural 50x20 (Argentina)

The RHS 50x20x1 steel profile weighs 1.1 kg/m (0.71 lb/ft), has a depth of 50 mm (1.97 in), flange width 20 mm (0.79 in). Cross-sectional area: 133.425 mm². Moment of inertia Ix = 4.086 cm⁴, Iy = 0.976 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	50 mm	1.97 in
Width (b)	20 mm	0.79 in
Thickness (t)	1 mm	0.04 in
Fillet radius (r)	2 mm	0.08 in
Weight	1.1 kg/m	0.71 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	133.42 mm²	0.207 in²
Moment of inertia (Ix)	4.09 cm⁴	0.10 in⁴
Moment of inertia (Iy)	0.98 cm⁴	0.02 in⁴
Elastic section modulus (Sx)	1.63 cm³	0.100 in³
Elastic section modulus (Sy)	0.98 cm³	0.060 in³
Plastic section modulus (Zx)	2.07 cm³	0.126 in³
Plastic section modulus (Zy)	1.09 cm³	0.066 in³
Radius of gyration (rx)	1.75 cm	0.689 in
Radius of gyration (ry)	0.86 cm	0.337 in