CHS 180x9 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 180x9 steel profile weighs 38.0 kg/m (25.50 lb/ft). Cross-sectional area: 4,834.911 mm². Moment of inertia Ix = 1,772.116 cm⁴, Iy = 1,772.116 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	180 mm	7.09 in
Weight	38.0 kg/m	25.50 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,834.91 mm²	7.494 in²
Moment of inertia (Ix)	1,772.12 cm⁴	42.58 in⁴
Moment of inertia (Iy)	1,772.12 cm⁴	42.58 in⁴
Elastic section modulus (Sx)	196.9 cm³	12.016 in³
Elastic section modulus (Sy)	196.9 cm³	12.016 in³
Plastic section modulus (Zx)	263.41 cm³	16.074 in³
Plastic section modulus (Zy)	263.41 cm³	16.074 in³
Radius of gyration (rx)	6.05 cm	2.384 in
Radius of gyration (ry)	6.05 cm	2.384 in