CHS 406x21.4 AHMSA · Weight & Dimensions

AHMSA, 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 406x21.4 steel profile weighs 203.0 kg/m (136.40 lb/ft). Cross-sectional area: 25,856.69 mm². Moment of inertia Ix = 47,956.118 cm⁴, Iy = 47,956.118 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	21.4 mm	0.84 in
Diameter (d)	406 mm	15.98 in
Weight	203.0 kg/m	136.40 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	25,856.69 mm²	40.078 in²
Moment of inertia (Ix)	47,956.12 cm⁴	1152.15 in⁴
Moment of inertia (Iy)	47,956.12 cm⁴	1152.15 in⁴
Elastic section modulus (Sx)	2,362.37 cm³	144.161 in³
Elastic section modulus (Sy)	2,362.37 cm³	144.161 in³
Plastic section modulus (Zx)	3,168.69 cm³	193.366 in³
Plastic section modulus (Zy)	3,168.69 cm³	193.366 in³
Radius of gyration (rx)	13.62 cm	5.362 in
Radius of gyration (ry)	13.62 cm	5.362 in