CHS 133x9 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 133x9 steel profile weighs 27.5 kg/m (18.49 lb/ft). Cross-sectional area: 3,506.017 mm². Moment of inertia Ix = 677.406 cm⁴, Iy = 677.406 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	133 mm	5.24 in
Weight	27.5 kg/m	18.49 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,506.02 mm²	5.434 in²
Moment of inertia (Ix)	677.41 cm⁴	16.27 in⁴
Moment of inertia (Iy)	677.41 cm⁴	16.27 in⁴
Elastic section modulus (Sx)	101.87 cm³	6.216 in³
Elastic section modulus (Sy)	101.87 cm³	6.216 in³
Plastic section modulus (Zx)	138.63 cm³	8.460 in³
Plastic section modulus (Zy)	138.63 cm³	8.460 in³
Radius of gyration (rx)	4.4 cm	1.731 in
Radius of gyration (ry)	4.4 cm	1.731 in