RHS 40x20x1.1 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 40x20 cal 18 (México) · Caño estructural 40x20 (Argentina)

The RHS 40x20x1.1 steel profile weighs 1.0 kg/m (0.65 lb/ft), has a depth of 40 mm (1.57 in), flange width 20 mm (0.79 in). Cross-sectional area: 124.044 mm². Moment of inertia Ix = 2.533 cm⁴, Iy = 0.86 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.1 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 in
Width (b)	20 mm	0.79 in
Thickness (t)	1.1 mm	0.04 in
Fillet radius (r)	2.2 mm	0.09 in
Weight	1.0 kg/m	0.65 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	124.04 mm²	0.192 in²
Moment of inertia (Ix)	2.53 cm⁴	0.06 in⁴
Moment of inertia (Iy)	0.86 cm⁴	0.02 in⁴
Elastic section modulus (Sx)	1.27 cm³	0.077 in³
Elastic section modulus (Sy)	0.86 cm³	0.052 in³
Plastic section modulus (Zx)	1.58 cm³	0.096 in³
Plastic section modulus (Zy)	0.98 cm³	0.060 in³
Radius of gyration (rx)	1.43 cm	0.563 in
Radius of gyration (ry)	0.83 cm	0.328 in