RHS 50x20x0.9 Acindar · Weight & Dimensions

Acindar, 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 50x20x0.9 steel profile weighs 0.9 kg/m (0.64 lb/ft), has a depth of 50 mm (1.97 in), flange width 20 mm (0.79 in). Cross-sectional area: 120.674 mm². Moment of inertia Ix = 3.721 cm⁴, Iy = 0.892 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 0.9 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)	0.9 mm	0.04 in
Fillet radius (r)	1.8 mm	0.07 in
Weight	0.9 kg/m	0.64 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	120.67 mm²	0.187 in²
Moment of inertia (Ix)	3.72 cm⁴	0.09 in⁴
Moment of inertia (Iy)	0.89 cm⁴	0.02 in⁴
Elastic section modulus (Sx)	1.49 cm³	0.091 in³
Elastic section modulus (Sy)	0.89 cm³	0.054 in³
Plastic section modulus (Zx)	1.88 cm³	0.115 in³
Plastic section modulus (Zy)	0.99 cm³	0.060 in³
Radius of gyration (rx)	1.76 cm	0.691 in
Radius of gyration (ry)	0.86 cm	0.338 in