CHS 203x5 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 203x5 steel profile weighs 24.4 kg/m (16.40 lb/ft). Cross-sectional area: 3,110.177 mm². Moment of inertia Ix = 1,525.114 cm⁴, Iy = 1,525.114 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	5 mm	0.20 in
Diameter (d)	203 mm	7.99 in
Weight	24.4 kg/m	16.40 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,110.18 mm²	4.821 in²
Moment of inertia (Ix)	1,525.11 cm⁴	36.64 in⁴
Moment of inertia (Iy)	1,525.11 cm⁴	36.64 in⁴
Elastic section modulus (Sx)	150.26 cm³	9.169 in³
Elastic section modulus (Sy)	150.26 cm³	9.169 in³
Plastic section modulus (Zx)	196.06 cm³	11.964 in³
Plastic section modulus (Zy)	196.06 cm³	11.964 in³
Radius of gyration (rx)	7 cm	2.757 in
Radius of gyration (ry)	7 cm	2.757 in