CHS 121x8 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 121x8 steel profile weighs 22.3 kg/m (14.98 lb/ft). Cross-sectional area: 2,840 mm². Moment of inertia Ix = 455.571 cm⁴, Iy = 455.571 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	8 mm	0.31 in
Diameter (d)	121 mm	4.76 in
Weight	22.3 kg/m	14.98 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,840 mm²	4.402 in²
Moment of inertia (Ix)	455.57 cm⁴	10.95 in⁴
Moment of inertia (Iy)	455.57 cm⁴	10.95 in⁴
Elastic section modulus (Sx)	75.3 cm³	4.595 in³
Elastic section modulus (Sy)	75.3 cm³	4.595 in³
Plastic section modulus (Zx)	102.32 cm³	6.244 in³
Plastic section modulus (Zy)	102.32 cm³	6.244 in³
Radius of gyration (rx)	4.01 cm	1.577 in
Radius of gyration (ry)	4.01 cm	1.577 in