CHS 89x11 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 89x11 steel profile weighs 21.2 kg/m (14.22 lb/ft). Cross-sectional area: 2,695.486 mm². Moment of inertia Ix = 209.069 cm⁴, Iy = 209.069 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	11 mm	0.43 in
Diameter (d)	89 mm	3.50 in
Weight	21.2 kg/m	14.22 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,695.49 mm²	4.178 in²
Moment of inertia (Ix)	209.07 cm⁴	5.02 in⁴
Moment of inertia (Iy)	209.07 cm⁴	5.02 in⁴
Elastic section modulus (Sx)	46.98 cm³	2.867 in³
Elastic section modulus (Sy)	46.98 cm³	2.867 in³
Plastic section modulus (Zx)	67.37 cm³	4.111 in³
Plastic section modulus (Zy)	67.37 cm³	4.111 in³
Radius of gyration (rx)	2.79 cm	1.096 in
Radius of gyration (ry)	2.79 cm	1.096 in