CHS 180x20 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 180x20 steel profile weighs 78.9 kg/m (53.03 lb/ft). Cross-sectional area: 10,053.096 mm². Moment of inertia Ix = 3,267.256 cm⁴, Iy = 3,267.256 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	20 mm	0.79 in
Diameter (d)	180 mm	7.09 in
Weight	78.9 kg/m	53.03 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	10,053.1 mm²	15.582 in²
Moment of inertia (Ix)	3,267.26 cm⁴	78.50 in⁴
Moment of inertia (Iy)	3,267.26 cm⁴	78.50 in⁴
Elastic section modulus (Sx)	363.03 cm³	22.153 in³
Elastic section modulus (Sy)	363.03 cm³	22.153 in³
Plastic section modulus (Zx)	514.67 cm³	31.407 in³
Plastic section modulus (Zy)	514.67 cm³	31.407 in³
Radius of gyration (rx)	5.7 cm	2.244 in
Radius of gyration (ry)	5.7 cm	2.244 in