CHS 299x30 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 299x30 steel profile weighs 199.0 kg/m (133.74 lb/ft). Cross-sectional area: 25,352.653 mm². Moment of inertia Ix = 23,217.009 cm⁴, Iy = 23,217.009 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	30 mm	1.18 in
Diameter (d)	299 mm	11.77 in
Weight	199.0 kg/m	133.74 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	25,352.65 mm²	39.297 in²
Moment of inertia (Ix)	23,217.01 cm⁴	557.79 in⁴
Moment of inertia (Iy)	23,217.01 cm⁴	557.79 in⁴
Elastic section modulus (Sx)	1,552.98 cm³	94.769 in³
Elastic section modulus (Sy)	1,552.98 cm³	94.769 in³
Plastic section modulus (Zx)	2,179.83 cm³	133.022 in³
Plastic section modulus (Zy)	2,179.83 cm³	133.022 in³
Radius of gyration (rx)	9.57 cm	3.768 in
Radius of gyration (ry)	9.57 cm	3.768 in