RHS 80x40x3 SAISC · Weight & Dimensions

SAISC, 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 11 (México) · Caño estructural 80x40 (Argentina)

The RHS 80x40x3 steel profile weighs 5.2 kg/m (3.49 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 660.823 mm². Moment of inertia Ix = 52.251 cm⁴, Iy = 17.556 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	40 mm	1.57 in
Thickness (t)	3 mm	0.12 in
Fillet radius (r)	6 mm	0.24 in
Weight	5.2 kg/m	3.49 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	660.82 mm²	1.024 in²
Moment of inertia (Ix)	52.25 cm⁴	1.26 in⁴
Moment of inertia (Iy)	17.56 cm⁴	0.42 in⁴
Elastic section modulus (Sx)	13.06 cm³	0.797 in³
Elastic section modulus (Sy)	8.78 cm³	0.536 in³
Plastic section modulus (Zx)	16.54 cm³	1.009 in³
Plastic section modulus (Zy)	10.16 cm³	0.620 in³
Radius of gyration (rx)	2.81 cm	1.107 in
Radius of gyration (ry)	1.63 cm	0.642 in