CHS 299x20 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 299x20 steel profile weighs 137.6 kg/m (92.47 lb/ft). Cross-sectional area: 17,530.087 mm². Moment of inertia Ix = 17,144.644 cm⁴, Iy = 17,144.644 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	20 mm	0.79 in
Diameter (d)	299 mm	11.77 in
Weight	137.6 kg/m	92.47 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	17,530.09 mm²	27.172 in²
Moment of inertia (Ix)	17,144.64 cm⁴	411.90 in⁴
Moment of inertia (Iy)	17,144.64 cm⁴	411.90 in⁴
Elastic section modulus (Sx)	1,146.8 cm³	69.982 in³
Elastic section modulus (Sy)	1,146.8 cm³	69.982 in³
Plastic section modulus (Zx)	1,559.49 cm³	95.166 in³
Plastic section modulus (Zy)	1,559.49 cm³	95.166 in³
Radius of gyration (rx)	9.89 cm	3.893 in
Radius of gyration (ry)	9.89 cm	3.893 in