CHS 203x45 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 203x45 steel profile weighs 175.3 kg/m (117.83 lb/ft). Cross-sectional area: 22,336.724 mm². Moment of inertia Ix = 7,535.573 cm⁴, Iy = 7,535.573 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	45 mm	1.77 in
Diameter (d)	203 mm	7.99 in
Weight	175.3 kg/m	117.83 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	22,336.72 mm²	34.622 in²
Moment of inertia (Ix)	7,535.57 cm⁴	181.04 in⁴
Moment of inertia (Iy)	7,535.57 cm⁴	181.04 in⁴
Elastic section modulus (Sx)	742.42 cm³	45.305 in³
Elastic section modulus (Sy)	742.42 cm³	45.305 in³
Plastic section modulus (Zx)	1,153.76 cm³	70.407 in³
Plastic section modulus (Zy)	1,153.76 cm³	70.407 in³
Radius of gyration (rx)	5.81 cm	2.287 in
Radius of gyration (ry)	5.81 cm	2.287 in