CHS 299x7 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 299x7 steel profile weighs 50.4 kg/m (33.88 lb/ft). Cross-sectional area: 6,421.415 mm². Moment of inertia Ix = 6,847.878 cm⁴, Iy = 6,847.878 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	7 mm	0.28 in
Diameter (d)	299 mm	11.77 in
Weight	50.4 kg/m	33.88 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	6,421.42 mm²	9.953 in²
Moment of inertia (Ix)	6,847.88 cm⁴	164.52 in⁴
Moment of inertia (Iy)	6,847.88 cm⁴	164.52 in⁴
Elastic section modulus (Sx)	458.05 cm³	27.952 in³
Elastic section modulus (Sy)	458.05 cm³	27.952 in³
Plastic section modulus (Zx)	596.96 cm³	36.429 in³
Plastic section modulus (Zy)	596.96 cm³	36.429 in³
Radius of gyration (rx)	10.33 cm	4.066 in
Radius of gyration (ry)	10.33 cm	4.066 in