RHS 180x120x6.4 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 180x120 cal 3 (México) · Caño estructural 180x120 (Argentina)

The RHS 180x120x6.4 steel profile weighs 28.0 kg/m (18.84 lb/ft), has a depth of 180 mm (7.09 in), flange width 120 mm (4.72 in). Cross-sectional area: 3,570.679 mm². Moment of inertia Ix = 1,573.234 cm⁴, Iy = 839.091 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)	120 mm	4.72 in
Thickness (t)	6.4 mm	0.25 in
Fillet radius (r)	12.8 mm	0.50 in
Weight	28.0 kg/m	18.84 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,570.68 mm²	5.535 in²
Moment of inertia (Ix)	1,573.23 cm⁴	37.80 in⁴
Moment of inertia (Iy)	839.09 cm⁴	20.16 in⁴
Elastic section modulus (Sx)	174.8 cm³	10.667 in³
Elastic section modulus (Sy)	139.85 cm³	8.534 in³
Plastic section modulus (Zx)	213.42 cm³	13.024 in³
Plastic section modulus (Zy)	161.44 cm³	9.852 in³
Radius of gyration (rx)	6.64 cm	2.613 in
Radius of gyration (ry)	4.85 cm	1.909 in