RHS 80x40x8.2 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 80x40x8.2 steel profile weighs 12.0 kg/m (8.05 lb/ft), has a depth of 80 mm (3.15 in), flange width 40 mm (1.57 in). Cross-sectional area: 1,525.882 mm². Moment of inertia Ix = 94.567 cm⁴, Iy = 29.907 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)	8.2 mm	0.32 in
Fillet radius (r)	16.4 mm	0.65 in
Weight	12.0 kg/m	8.05 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,525.88 mm²	2.365 in²
Moment of inertia (Ix)	94.57 cm⁴	2.27 in⁴
Moment of inertia (Iy)	29.91 cm⁴	0.72 in⁴
Elastic section modulus (Sx)	23.64 cm³	1.443 in³
Elastic section modulus (Sy)	14.95 cm³	0.913 in³
Plastic section modulus (Zx)	33.48 cm³	2.043 in³
Plastic section modulus (Zy)	19.95 cm³	1.217 in³
Radius of gyration (rx)	2.49 cm	0.980 in
Radius of gyration (ry)	1.4 cm	0.551 in