CHS 108x18 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 108x18 steel profile weighs 40.0 kg/m (26.85 lb/ft). Cross-sectional area: 5,089.38 mm². Moment of inertia Ix = 535.912 cm⁴, Iy = 535.912 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	18 mm	0.71 in
Diameter (d)	108 mm	4.25 in
Weight	40.0 kg/m	26.85 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	5,089.38 mm²	7.889 in²
Moment of inertia (Ix)	535.91 cm⁴	12.88 in⁴
Moment of inertia (Iy)	535.91 cm⁴	12.88 in⁴
Elastic section modulus (Sx)	99.24 cm³	6.056 in³
Elastic section modulus (Sy)	99.24 cm³	6.056 in³
Plastic section modulus (Zx)	147.74 cm³	9.016 in³
Plastic section modulus (Zy)	147.74 cm³	9.016 in³
Radius of gyration (rx)	3.24 cm	1.278 in
Radius of gyration (ry)	3.24 cm	1.278 in