RHS 80x50x6.4 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 cal 3 (México) · Caño estructural 80x50 (Argentina)

The RHS 80x50x6.4 steel profile weighs 10.9 kg/m (7.36 lb/ft), has a depth of 80 mm (3.15 in), flange width 50 mm (1.97 in). Cross-sectional area: 1,394.679 mm². Moment of inertia Ix = 103.422 cm⁴, Iy = 48.571 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	80 mm	3.15 in
Width (b)	50 mm	1.97 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	10.9 kg/m	7.36 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,394.68 mm²	2.162 in²
Moment of inertia (Ix)	103.42 cm⁴	2.48 in⁴
Moment of inertia (Iy)	48.57 cm⁴	1.17 in⁴
Elastic section modulus (Sx)	25.86 cm³	1.578 in³
Elastic section modulus (Sy)	19.43 cm³	1.186 in³
Plastic section modulus (Zx)	33.91 cm³	2.069 in³
Plastic section modulus (Zy)	24.24 cm³	1.479 in³
Radius of gyration (rx)	2.72 cm	1.072 in
Radius of gyration (ry)	1.87 cm	0.735 in