CHS 299x9 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 299x9 steel profile weighs 64.4 kg/m (43.26 lb/ft). Cross-sectional area: 8,199.557 mm². Moment of inertia Ix = 8,628.086 cm⁴, Iy = 8,628.086 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	299 mm	11.77 in
Weight	64.4 kg/m	43.26 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	8,199.56 mm²	12.709 in²
Moment of inertia (Ix)	8,628.09 cm⁴	207.29 in⁴
Moment of inertia (Iy)	8,628.09 cm⁴	207.29 in⁴
Elastic section modulus (Sx)	577.13 cm³	35.219 in³
Elastic section modulus (Sy)	577.13 cm³	35.219 in³
Plastic section modulus (Zx)	757.14 cm³	46.204 in³
Plastic section modulus (Zy)	757.14 cm³	46.204 in³
Radius of gyration (rx)	10.26 cm	4.039 in
Radius of gyration (ry)	10.26 cm	4.039 in