CHS 73x3 GOST · Weight & Dimensions

GOST, 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 73x3 steel profile weighs 5.2 kg/m (3.48 lb/ft). Cross-sectional area: 659.734 mm². Moment of inertia Ix = 40.483 cm⁴, Iy = 40.483 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	3 mm	0.12 in
Diameter (d)	73 mm	2.87 in
Weight	5.2 kg/m	3.48 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	659.73 mm²	1.023 in²
Moment of inertia (Ix)	40.48 cm⁴	0.97 in⁴
Moment of inertia (Iy)	40.48 cm⁴	0.97 in⁴
Elastic section modulus (Sx)	11.09 cm³	0.677 in³
Elastic section modulus (Sy)	11.09 cm³	0.677 in³
Plastic section modulus (Zx)	14.71 cm³	0.898 in³
Plastic section modulus (Zy)	14.71 cm³	0.898 in³
Radius of gyration (rx)	2.48 cm	0.975 in
Radius of gyration (ry)	2.48 cm	0.975 in