RHS 80x50x4.4 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 80x50 (México) · Caño estructural 80x50 (Argentina)

The RHS 80x50x4.4 steel profile weighs 8.0 kg/m (5.36 lb/ft), has a depth of 80 mm (3.15 in), flange width 50 mm (1.97 in). Cross-sectional area: 1,016.704 mm². Moment of inertia Ix = 81.767 cm⁴, Iy = 38.934 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)	50 mm	1.97 in
Thickness (t)	4.4 mm	0.17 in
Fillet radius (r)	8.8 mm	0.35 in
Weight	8.0 kg/m	5.36 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,016.7 mm²	1.576 in²
Moment of inertia (Ix)	81.77 cm⁴	1.96 in⁴
Moment of inertia (Iy)	38.93 cm⁴	0.94 in⁴
Elastic section modulus (Sx)	20.44 cm³	1.247 in³
Elastic section modulus (Sy)	15.57 cm³	0.950 in³
Plastic section modulus (Zx)	25.83 cm³	1.576 in³
Plastic section modulus (Zy)	18.58 cm³	1.134 in³
Radius of gyration (rx)	2.84 cm	1.116 in
Radius of gyration (ry)	1.96 cm	0.770 in