CHS 406x12 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 406x12 steel profile weighs 116.6 kg/m (78.36 lb/ft). Cross-sectional area: 14,853.45 mm². Moment of inertia Ix = 28,849.113 cm⁴, Iy = 28,849.113 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	12 mm	0.47 in
Diameter (d)	406 mm	15.98 in
Weight	116.6 kg/m	78.36 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	14,853.45 mm²	23.023 in²
Moment of inertia (Ix)	28,849.11 cm⁴	693.10 in⁴
Moment of inertia (Iy)	28,849.11 cm⁴	693.10 in⁴
Elastic section modulus (Sx)	1,421.14 cm³	86.724 in³
Elastic section modulus (Sy)	1,421.14 cm³	86.724 in³
Plastic section modulus (Zx)	1,863.41 cm³	113.713 in³
Plastic section modulus (Zy)	1,863.41 cm³	113.713 in³
Radius of gyration (rx)	13.94 cm	5.487 in
Radius of gyration (ry)	13.94 cm	5.487 in