CHS 73x9 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 73x9 steel profile weighs 14.2 kg/m (9.55 lb/ft). Cross-sectional area: 1,809.557 mm². Moment of inertia Ix = 94.482 cm⁴, Iy = 94.482 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	73 mm	2.87 in
Weight	14.2 kg/m	9.55 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,809.56 mm²	2.805 in²
Moment of inertia (Ix)	94.48 cm⁴	2.27 in⁴
Moment of inertia (Iy)	94.48 cm⁴	2.27 in⁴
Elastic section modulus (Sx)	25.89 cm³	1.580 in³
Elastic section modulus (Sy)	25.89 cm³	1.580 in³
Plastic section modulus (Zx)	37.11 cm³	2.264 in³
Plastic section modulus (Zy)	37.11 cm³	2.264 in³
Radius of gyration (rx)	2.29 cm	0.900 in
Radius of gyration (ry)	2.29 cm	0.900 in