CHS 299x40 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 299x40 steel profile weighs 255.5 kg/m (171.69 lb/ft). Cross-sectional area: 32,546.9 mm². Moment of inertia Ix = 27,941.92 cm⁴, Iy = 27,941.92 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	40 mm	1.57 in
Diameter (d)	299 mm	11.77 in
Weight	255.5 kg/m	171.69 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	32,546.9 mm²	50.448 in²
Moment of inertia (Ix)	27,941.92 cm⁴	671.30 in⁴
Moment of inertia (Iy)	27,941.92 cm⁴	671.30 in⁴
Elastic section modulus (Sx)	1,869.02 cm³	114.055 in³
Elastic section modulus (Sy)	1,869.02 cm³	114.055 in³
Plastic section modulus (Zx)	2,704.57 cm³	165.044 in³
Plastic section modulus (Zy)	2,704.57 cm³	165.044 in³
Radius of gyration (rx)	9.27 cm	3.648 in
Radius of gyration (ry)	9.27 cm	3.648 in