CHS 168x18.3 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 168x18.3 steel profile weighs 67.6 kg/m (45.40 lb/ft). Cross-sectional area: 8,606.424 mm². Moment of inertia Ix = 2,446.912 cm⁴, Iy = 2,446.912 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	18.3 mm	0.72 in
Diameter (d)	168 mm	6.61 in
Weight	67.6 kg/m	45.40 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	8,606.42 mm²	13.340 in²
Moment of inertia (Ix)	2,446.91 cm⁴	58.79 in⁴
Moment of inertia (Iy)	2,446.91 cm⁴	58.79 in⁴
Elastic section modulus (Sx)	291.3 cm³	17.776 in³
Elastic section modulus (Sy)	291.3 cm³	17.776 in³
Plastic section modulus (Zx)	412.15 cm³	25.151 in³
Plastic section modulus (Zy)	412.15 cm³	25.151 in³
Radius of gyration (rx)	5.33 cm	2.099 in
Radius of gyration (ry)	5.33 cm	2.099 in