CHS 299x70 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 299x70 steel profile weighs 395.3 kg/m (265.66 lb/ft). Cross-sectional area: 50,359.73 mm². Moment of inertia Ix = 36,095.966 cm⁴, Iy = 36,095.966 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	70 mm	2.76 in
Diameter (d)	299 mm	11.77 in
Weight	395.3 kg/m	265.66 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	50,359.73 mm²	78.058 in²
Moment of inertia (Ix)	36,095.97 cm⁴	867.21 in⁴
Moment of inertia (Iy)	36,095.97 cm⁴	867.21 in⁴
Elastic section modulus (Sx)	2,414.45 cm³	147.339 in³
Elastic section modulus (Sy)	2,414.45 cm³	147.339 in³
Plastic section modulus (Zx)	3,785.2 cm³	230.988 in³
Plastic section modulus (Zy)	3,785.2 cm³	230.988 in³
Radius of gyration (rx)	8.47 cm	3.333 in
Radius of gyration (ry)	8.47 cm	3.333 in