CHS 203x9 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 203x9 steel profile weighs 43.1 kg/m (28.94 lb/ft). Cross-sectional area: 5,485.221 mm². Moment of inertia Ix = 2,586.076 cm⁴, Iy = 2,586.076 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	203 mm	7.99 in
Weight	43.1 kg/m	28.94 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	5,485.22 mm²	8.502 in²
Moment of inertia (Ix)	2,586.08 cm⁴	62.13 in⁴
Moment of inertia (Iy)	2,586.08 cm⁴	62.13 in⁴
Elastic section modulus (Sx)	254.79 cm³	15.548 in³
Elastic section modulus (Sy)	254.79 cm³	15.548 in³
Plastic section modulus (Zx)	338.97 cm³	20.685 in³
Plastic section modulus (Zy)	338.97 cm³	20.685 in³
Radius of gyration (rx)	6.87 cm	2.703 in
Radius of gyration (ry)	6.87 cm	2.703 in