RHS 140x80x6.4 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 140x80 cal 3 (México) · Caño estructural 140x80 (Argentina)

The RHS 140x80x6.4 steel profile weighs 20.0 kg/m (13.43 lb/ft), has a depth of 140 mm (5.51 in), flange width 80 mm (3.15 in). Cross-sectional area: 2,546.679 mm². Moment of inertia Ix = 626.925 cm⁴, Iy = 259.823 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	140 mm	5.51 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	20.0 kg/m	13.43 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,546.68 mm²	3.947 in²
Moment of inertia (Ix)	626.93 cm⁴	15.06 in⁴
Moment of inertia (Iy)	259.82 cm⁴	6.24 in⁴
Elastic section modulus (Sx)	89.56 cm³	5.465 in³
Elastic section modulus (Sy)	64.96 cm³	3.964 in³
Plastic section modulus (Zx)	112.92 cm³	6.891 in³
Plastic section modulus (Zy)	76.3 cm³	4.656 in³
Radius of gyration (rx)	4.96 cm	1.953 in
Radius of gyration (ry)	3.19 cm	1.258 in