CHS 83x9 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 83x9 steel profile weighs 16.4 kg/m (11.03 lb/ft). Cross-sectional area: 2,092.301 mm². Moment of inertia Ix = 145.336 cm⁴, Iy = 145.336 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	83 mm	3.27 in
Weight	16.4 kg/m	11.03 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,092.3 mm²	3.243 in²
Moment of inertia (Ix)	145.34 cm⁴	3.49 in⁴
Moment of inertia (Iy)	145.34 cm⁴	3.49 in⁴
Elastic section modulus (Sx)	35.02 cm³	2.137 in³
Elastic section modulus (Sy)	35.02 cm³	2.137 in³
Plastic section modulus (Zx)	49.53 cm³	3.022 in³
Plastic section modulus (Zy)	49.53 cm³	3.022 in³
Radius of gyration (rx)	2.64 cm	1.038 in
Radius of gyration (ry)	2.64 cm	1.038 in