CHS 159x18 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 159x18 steel profile weighs 62.6 kg/m (42.06 lb/ft). Cross-sectional area: 7,973.362 mm². Moment of inertia Ix = 2,013.772 cm⁴, Iy = 2,013.772 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	18 mm	0.71 in
Diameter (d)	159 mm	6.26 in
Weight	62.6 kg/m	42.06 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	7,973.36 mm²	12.359 in²
Moment of inertia (Ix)	2,013.77 cm⁴	48.38 in⁴
Moment of inertia (Iy)	2,013.77 cm⁴	48.38 in⁴
Elastic section modulus (Sx)	253.3 cm³	15.458 in³
Elastic section modulus (Sy)	253.3 cm³	15.458 in³
Plastic section modulus (Zx)	359.8 cm³	21.957 in³
Plastic section modulus (Zy)	359.8 cm³	21.957 in³
Radius of gyration (rx)	5.03 cm	1.979 in
Radius of gyration (ry)	5.03 cm	1.979 in