RHS 140x90x6.4 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 140x90 cal 3 (México) · Caño estructural 140x90 (Argentina)

The RHS 140x90x6.4 steel profile weighs 21.0 kg/m (14.11 lb/ft), has a depth of 140 mm (5.51 in), flange width 90 mm (3.54 in). Cross-sectional area: 2,674.679 mm². Moment of inertia Ix = 684.086 cm⁴, Iy = 342.6 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)	90 mm	3.54 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	21.0 kg/m	14.11 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,674.68 mm²	4.146 in²
Moment of inertia (Ix)	684.09 cm⁴	16.44 in⁴
Moment of inertia (Iy)	342.6 cm⁴	8.23 in⁴
Elastic section modulus (Sx)	97.73 cm³	5.964 in³
Elastic section modulus (Sy)	76.13 cm³	4.646 in³
Plastic section modulus (Zx)	121.47 cm³	7.413 in³
Plastic section modulus (Zy)	89.36 cm³	5.453 in³
Radius of gyration (rx)	5.06 cm	1.991 in
Radius of gyration (ry)	3.58 cm	1.409 in