RHS 40x30x0.9 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 40x30 cal 18 (México) · Caño estructural 40x30 (Argentina)

The RHS 40x30x0.9 steel profile weighs 0.9 kg/m (0.64 lb/ft), has a depth of 40 mm (1.57 in), flange width 30 mm (1.18 in). Cross-sectional area: 120.674 mm². Moment of inertia Ix = 2.818 cm⁴, Iy = 1.815 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 0.9 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 in
Width (b)	30 mm	1.18 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)	2.82 cm⁴	0.07 in⁴
Moment of inertia (Iy)	1.82 cm⁴	0.04 in⁴
Elastic section modulus (Sx)	1.41 cm³	0.086 in³
Elastic section modulus (Sy)	1.21 cm³	0.074 in³
Plastic section modulus (Zx)	1.67 cm³	0.102 in³
Plastic section modulus (Zy)	1.37 cm³	0.084 in³
Radius of gyration (rx)	1.53 cm	0.602 in
Radius of gyration (ry)	1.23 cm	0.483 in