CHS 133x25 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 133x25 steel profile weighs 66.6 kg/m (44.75 lb/ft). Cross-sectional area: 8,482.3 mm². Moment of inertia Ix = 1,302.987 cm⁴, Iy = 1,302.987 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	25 mm	0.98 in
Diameter (d)	133 mm	5.24 in
Weight	66.6 kg/m	44.75 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	8,482.3 mm²	13.148 in²
Moment of inertia (Ix)	1,302.99 cm⁴	31.30 in⁴
Moment of inertia (Iy)	1,302.99 cm⁴	31.30 in⁴
Elastic section modulus (Sx)	195.94 cm³	11.957 in³
Elastic section modulus (Sy)	195.94 cm³	11.957 in³
Plastic section modulus (Zx)	296.81 cm³	18.112 in³
Plastic section modulus (Zy)	296.81 cm³	18.112 in³
Radius of gyration (rx)	3.92 cm	1.543 in
Radius of gyration (ry)	3.92 cm	1.543 in