CHS 121x12 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 121x12 steel profile weighs 32.3 kg/m (21.68 lb/ft). Cross-sectional area: 4,109.203 mm². Moment of inertia Ix = 617.665 cm⁴, Iy = 617.665 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	12 mm	0.47 in
Diameter (d)	121 mm	4.76 in
Weight	32.3 kg/m	21.68 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,109.2 mm²	6.369 in²
Moment of inertia (Ix)	617.66 cm⁴	14.84 in⁴
Moment of inertia (Iy)	617.66 cm⁴	14.84 in⁴
Elastic section modulus (Sx)	102.09 cm³	6.230 in³
Elastic section modulus (Sy)	102.09 cm³	6.230 in³
Plastic section modulus (Zx)	143.15 cm³	8.735 in³
Plastic section modulus (Zy)	143.15 cm³	8.735 in³
Radius of gyration (rx)	3.88 cm	1.526 in
Radius of gyration (ry)	3.88 cm	1.526 in