RHS 120x80x6.4 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 120x80 cal 3 (México) · Caño estructural 120x80 (Argentina)

The RHS 120x80x6.4 steel profile weighs 18.0 kg/m (12.08 lb/ft), has a depth of 120 mm (4.72 in), flange width 80 mm (3.15 in). Cross-sectional area: 2,290.679 mm². Moment of inertia Ix = 425.695 cm⁴, Iy = 225.067 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	120 mm	4.72 in
Width (b)	80 mm	3.15 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	18.0 kg/m	12.08 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,290.68 mm²	3.551 in²
Moment of inertia (Ix)	425.7 cm⁴	10.23 in⁴
Moment of inertia (Iy)	225.07 cm⁴	5.41 in⁴
Elastic section modulus (Sx)	70.95 cm³	4.330 in³
Elastic section modulus (Sy)	56.27 cm³	3.434 in³
Plastic section modulus (Zx)	88.74 cm³	5.415 in³
Plastic section modulus (Zy)	66.88 cm³	4.081 in³
Radius of gyration (rx)	4.31 cm	1.697 in
Radius of gyration (ry)	3.13 cm	1.234 in