CHS 203x30 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 203x30 steel profile weighs 128.0 kg/m (86.01 lb/ft). Cross-sectional area: 16,304.866 mm². Moment of inertia Ix = 6,283.284 cm⁴, Iy = 6,283.284 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	30 mm	1.18 in
Diameter (d)	203 mm	7.99 in
Weight	128.0 kg/m	86.01 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	16,304.87 mm²	25.273 in²
Moment of inertia (Ix)	6,283.28 cm⁴	150.96 in⁴
Moment of inertia (Iy)	6,283.28 cm⁴	150.96 in⁴
Elastic section modulus (Sx)	619.04 cm³	37.776 in³
Elastic section modulus (Sy)	619.04 cm³	37.776 in³
Plastic section modulus (Zx)	906.87 cm³	55.341 in³
Plastic section modulus (Zy)	906.87 cm³	55.341 in³
Radius of gyration (rx)	6.21 cm	2.444 in
Radius of gyration (ry)	6.21 cm	2.444 in