CHS 89x20 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 89x20 steel profile weighs 34.0 kg/m (22.87 lb/ft). Cross-sectional area: 4,335.398 mm². Moment of inertia Ix = 279.687 cm⁴, Iy = 279.687 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	20 mm	0.79 in
Diameter (d)	89 mm	3.50 in
Weight	34.0 kg/m	22.87 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,335.4 mm²	6.720 in²
Moment of inertia (Ix)	279.69 cm⁴	6.72 in⁴
Moment of inertia (Iy)	279.69 cm⁴	6.72 in⁴
Elastic section modulus (Sx)	62.85 cm³	3.835 in³
Elastic section modulus (Sy)	62.85 cm³	3.835 in³
Plastic section modulus (Zx)	97.89 cm³	5.973 in³
Plastic section modulus (Zy)	97.89 cm³	5.973 in³
Radius of gyration (rx)	2.54 cm	1.000 in
Radius of gyration (ry)	2.54 cm	1.000 in