RHS 50x40x0.9 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 50x40 cal 18 (México) · Caño estructural 50x40 (Argentina)

The RHS 50x40x0.9 steel profile weighs 1.2 kg/m (0.83 lb/ft), has a depth of 50 mm (1.97 in), flange width 40 mm (1.57 in). Cross-sectional area: 156.674 mm². Moment of inertia Ix = 5.891 cm⁴, Iy = 4.195 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)	40 mm	1.57 in
Thickness (t)	0.9 mm	0.04 in
Fillet radius (r)	1.8 mm	0.07 in
Weight	1.2 kg/m	0.83 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	156.67 mm²	0.243 in²
Moment of inertia (Ix)	5.89 cm⁴	0.14 in⁴
Moment of inertia (Iy)	4.19 cm⁴	0.10 in⁴
Elastic section modulus (Sx)	2.36 cm³	0.144 in³
Elastic section modulus (Sy)	2.1 cm³	0.128 in³
Plastic section modulus (Zx)	2.76 cm³	0.169 in³
Plastic section modulus (Zy)	2.37 cm³	0.145 in³
Radius of gyration (rx)	1.94 cm	0.763 in
Radius of gyration (ry)	1.64 cm	0.644 in