CHS 299x45 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 299x45 steel profile weighs 281.9 kg/m (189.42 lb/ft). Cross-sectional area: 35,908.404 mm². Moment of inertia Ix = 29,867.264 cm⁴, Iy = 29,867.264 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	45 mm	1.77 in
Diameter (d)	299 mm	11.77 in
Weight	281.9 kg/m	189.42 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	35,908.4 mm²	55.658 in²
Moment of inertia (Ix)	29,867.26 cm⁴	717.56 in⁴
Moment of inertia (Iy)	29,867.26 cm⁴	717.56 in⁴
Elastic section modulus (Sx)	1,997.81 cm³	121.914 in³
Elastic section modulus (Sy)	1,997.81 cm³	121.914 in³
Plastic section modulus (Zx)	2,933.6 cm³	179.020 in³
Plastic section modulus (Zy)	2,933.6 cm³	179.020 in³
Radius of gyration (rx)	9.12 cm	3.591 in
Radius of gyration (ry)	9.12 cm	3.591 in