CHS 406x36.5 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 406x36.5 steel profile weighs 332.6 kg/m (223.51 lb/ft). Cross-sectional area: 42,369.875 mm². Moment of inertia Ix = 73,015.211 cm⁴, Iy = 73,015.211 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	36.5 mm	1.44 in
Diameter (d)	406 mm	15.98 in
Weight	332.6 kg/m	223.51 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	42,369.87 mm²	65.673 in²
Moment of inertia (Ix)	73,015.21 cm⁴	1754.19 in⁴
Moment of inertia (Iy)	73,015.21 cm⁴	1754.19 in⁴
Elastic section modulus (Sx)	3,596.81 cm³	219.492 in³
Elastic section modulus (Sy)	3,596.81 cm³	219.492 in³
Plastic section modulus (Zx)	4,999.56 cm³	305.093 in³
Plastic section modulus (Zy)	4,999.56 cm³	305.093 in³
Radius of gyration (rx)	13.13 cm	5.168 in
Radius of gyration (ry)	13.13 cm	5.168 in