RHS 40x20x1.6 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 16 (México) · Caño estructural 40x20 (Argentina)

The RHS 40x20x1.6 steel profile weighs 1.4 kg/m (0.93 lb/ft), has a depth of 40 mm (1.57 in), flange width 20 mm (0.79 in). Cross-sectional area: 175.167 mm². Moment of inertia Ix = 3.434 cm⁴, Iy = 1.151 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.6 mm ≈ 16 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 in
Width (b)	20 mm	0.79 in
Thickness (t)	1.6 mm	0.06 in
Fillet radius (r)	3.2 mm	0.13 in
Weight	1.4 kg/m	0.93 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	175.17 mm²	0.272 in²
Moment of inertia (Ix)	3.43 cm⁴	0.08 in⁴
Moment of inertia (Iy)	1.15 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	1.72 cm³	0.105 in³
Elastic section modulus (Sy)	1.15 cm³	0.070 in³
Plastic section modulus (Zx)	2.18 cm³	0.133 in³
Plastic section modulus (Zy)	1.34 cm³	0.082 in³
Radius of gyration (rx)	1.4 cm	0.551 in
Radius of gyration (ry)	0.81 cm	0.319 in