RHS 180x110x6.4 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 180x110 cal 3 (México) · Caño estructural 180x110 (Argentina)

The RHS 180x110x6.4 steel profile weighs 27.0 kg/m (18.16 lb/ft), has a depth of 180 mm (7.09 in), flange width 110 mm (4.33 in). Cross-sectional area: 3,442.679 mm². Moment of inertia Ix = 1,476.752 cm⁴, Iy = 686.472 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	180 mm	7.09 in
Width (b)	110 mm	4.33 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	27.0 kg/m	18.16 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,442.68 mm²	5.336 in²
Moment of inertia (Ix)	1,476.75 cm⁴	35.48 in⁴
Moment of inertia (Iy)	686.47 cm⁴	16.49 in⁴
Elastic section modulus (Sx)	164.08 cm³	10.013 in³
Elastic section modulus (Sy)	124.81 cm³	7.617 in³
Plastic section modulus (Zx)	202.31 cm³	12.346 in³
Plastic section modulus (Zy)	143.91 cm³	8.782 in³
Radius of gyration (rx)	6.55 cm	2.579 in
Radius of gyration (ry)	4.47 cm	1.758 in