RHS 80x40x4.4 Açotubo · Weight & Dimensions

Açotubo, 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 (México) · Caño estructural 80x40 (Argentina)

The RHS 80x40x4.4 steel profile weighs 7.3 kg/m (4.90 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 928.704 mm². Moment of inertia Ix = 69.179 cm⁴, Iy = 22.822 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.4 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	40 mm	1.57 in
Thickness (t)	4.4 mm	0.17 in
Fillet radius (r)	8.8 mm	0.35 in
Weight	7.3 kg/m	4.90 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	928.7 mm²	1.439 in²
Moment of inertia (Ix)	69.18 cm⁴	1.66 in⁴
Moment of inertia (Iy)	22.82 cm⁴	0.55 in⁴
Elastic section modulus (Sx)	17.29 cm³	1.055 in³
Elastic section modulus (Sy)	11.41 cm³	0.696 in³
Plastic section modulus (Zx)	22.51 cm³	1.373 in³
Plastic section modulus (Zy)	13.72 cm³	0.837 in³
Radius of gyration (rx)	2.73 cm	1.075 in
Radius of gyration (ry)	1.57 cm	0.617 in