CHS 299x5 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 299x5 steel profile weighs 36.3 kg/m (24.36 lb/ft). Cross-sectional area: 4,618.141 mm². Moment of inertia Ix = 4,991.114 cm⁴, Iy = 4,991.114 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	5 mm	0.20 in
Diameter (d)	299 mm	11.77 in
Weight	36.3 kg/m	24.36 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,618.14 mm²	7.158 in²
Moment of inertia (Ix)	4,991.11 cm⁴	119.91 in⁴
Moment of inertia (Iy)	4,991.11 cm⁴	119.91 in⁴
Elastic section modulus (Sx)	333.85 cm³	20.373 in³
Elastic section modulus (Sy)	333.85 cm³	20.373 in³
Plastic section modulus (Zx)	432.22 cm³	26.376 in³
Plastic section modulus (Zy)	432.22 cm³	26.376 in³
Radius of gyration (rx)	10.4 cm	4.093 in
Radius of gyration (ry)	10.4 cm	4.093 in