CHS 406x16.66 IMCA · Weight & Dimensions

IMCA, 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 406x16.66 steel profile weighs 160.0 kg/m (107.49 lb/ft). Cross-sectional area: 20,377.64 mm². Moment of inertia Ix = 38,682.669 cm⁴, Iy = 38,682.669 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	16.7 mm	0.66 in
Diameter (d)	406 mm	15.98 in
Weight	160.0 kg/m	107.49 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	20,377.64 mm²	31.585 in²
Moment of inertia (Ix)	38,682.67 cm⁴	929.35 in⁴
Moment of inertia (Iy)	38,682.67 cm⁴	929.35 in⁴
Elastic section modulus (Sx)	1,905.55 cm³	116.284 in³
Elastic section modulus (Sy)	1,905.55 cm³	116.284 in³
Plastic section modulus (Zx)	2,526.96 cm³	154.205 in³
Plastic section modulus (Zy)	2,526.96 cm³	154.205 in³
Radius of gyration (rx)	13.78 cm	5.424 in
Radius of gyration (ry)	13.78 cm	5.424 in