CHS 45x9 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 45x9 steel profile weighs 8.0 kg/m (5.37 lb/ft). Cross-sectional area: 1,017.876 mm². Moment of inertia Ix = 17.52 cm⁴, Iy = 17.52 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	45 mm	1.77 in
Weight	8.0 kg/m	5.37 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,017.88 mm²	1.578 in²
Moment of inertia (Ix)	17.52 cm⁴	0.42 in⁴
Moment of inertia (Iy)	17.52 cm⁴	0.42 in⁴
Elastic section modulus (Sx)	7.79 cm³	0.475 in³
Elastic section modulus (Sy)	7.79 cm³	0.475 in³
Plastic section modulus (Zx)	11.91 cm³	0.727 in³
Plastic section modulus (Zy)	11.91 cm³	0.727 in³
Radius of gyration (rx)	1.31 cm	0.517 in
Radius of gyration (ry)	1.31 cm	0.517 in