CHS 73x6.4 Açotubo · Weight & Dimensions

Açotubo, cold-formed sections · Circular Hollow Section

Circular Hollow Sections (CHS) are round tubular profiles with the most efficient cross-section for compression. Used for columns, trusses, and architectural structures.

Also known as: Caño estructural redondo (Argentina)

The CHS 73x6.4 steel profile weighs 10.5 kg/m (7.06 lb/ft). Cross-sectional area: 1,339.072 mm². Moment of inertia Ix = 74.93 cm⁴, Iy = 74.93 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Thickness (t)	6.4 mm	0.25 in
Diameter (d)	73 mm	2.87 in
Weight	10.5 kg/m	7.06 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,339.07 mm²	2.076 in²
Moment of inertia (Ix)	74.93 cm⁴	1.80 in⁴
Moment of inertia (Iy)	74.93 cm⁴	1.80 in⁴
Elastic section modulus (Sx)	20.53 cm³	1.253 in³
Elastic section modulus (Sy)	20.53 cm³	1.253 in³
Plastic section modulus (Zx)	28.47 cm³	1.738 in³
Plastic section modulus (Zy)	28.47 cm³	1.738 in³
Radius of gyration (rx)	2.37 cm	0.931 in
Radius of gyration (ry)	2.37 cm	0.931 in