RHS 80x40x9.5 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 80x40x9.5 steel profile weighs 13.2 kg/m (8.90 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 1,686.586 mm². Moment of inertia Ix = 97.197 cm⁴, Iy = 30.441 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	40 mm	1.57 in
Thickness (t)	9.5 mm	0.37 in
Fillet radius (r)	19 mm	0.75 in
Weight	13.2 kg/m	8.90 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,686.59 mm²	2.614 in²
Moment of inertia (Ix)	97.2 cm⁴	2.34 in⁴
Moment of inertia (Iy)	30.44 cm⁴	0.73 in⁴
Elastic section modulus (Sx)	24.3 cm³	1.483 in³
Elastic section modulus (Sy)	15.22 cm³	0.929 in³
Plastic section modulus (Zx)	35.58 cm³	2.171 in³
Plastic section modulus (Zy)	21.04 cm³	1.284 in³
Radius of gyration (rx)	2.4 cm	0.945 in
Radius of gyration (ry)	1.34 cm	0.529 in