RHS 80x40x1.1 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 80x40 cal 18 (México) · Caño estructural 80x40 (Argentina)

The RHS 80x40x1.1 steel profile weighs 2.0 kg/m (1.35 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 256.044 mm². Moment of inertia Ix = 21.836 cm⁴, Iy = 7.528 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	40 mm	1.57 in
Thickness (t)	1.1 mm	0.04 in
Fillet radius (r)	2.2 mm	0.09 in
Weight	2.0 kg/m	1.35 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	256.04 mm²	0.397 in²
Moment of inertia (Ix)	21.84 cm⁴	0.52 in⁴
Moment of inertia (Iy)	7.53 cm⁴	0.18 in⁴
Elastic section modulus (Sx)	5.46 cm³	0.333 in³
Elastic section modulus (Sy)	3.76 cm³	0.230 in³
Plastic section modulus (Zx)	6.68 cm³	0.407 in³
Plastic section modulus (Zy)	4.15 cm³	0.253 in³
Radius of gyration (rx)	2.92 cm	1.150 in
Radius of gyration (ry)	1.71 cm	0.675 in