CHS 89x9 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 89x9 steel profile weighs 17.8 kg/m (11.93 lb/ft). Cross-sectional area: 2,261.947 mm². Moment of inertia Ix = 183.246 cm⁴, Iy = 183.246 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	89 mm	3.50 in
Weight	17.8 kg/m	11.93 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,261.95 mm²	3.506 in²
Moment of inertia (Ix)	183.25 cm⁴	4.40 in⁴
Moment of inertia (Iy)	183.25 cm⁴	4.40 in⁴
Elastic section modulus (Sx)	41.18 cm³	2.513 in³
Elastic section modulus (Sy)	41.18 cm³	2.513 in³
Plastic section modulus (Zx)	57.84 cm³	3.530 in³
Plastic section modulus (Zy)	57.84 cm³	3.530 in³
Radius of gyration (rx)	2.85 cm	1.121 in
Radius of gyration (ry)	2.85 cm	1.121 in