CHS 139.7x8 · Weight & Dimensions

EN — 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 139.7x8 steel profile weighs 26.0 kg/m (17.47 lb/ft). Cross-sectional area: 3,310 mm². Moment of inertia Ix = 720.29 cm⁴, Iy = 720.29 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	8 mm	0.31 in
Diameter (d)	139.7 mm	5.50 in
Weight	26.0 kg/m	17.47 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	3,310 mm²	5.130 in²
Moment of inertia (Ix)	720.29 cm⁴	17.30 in⁴
Moment of inertia (Iy)	720.29 cm⁴	17.30 in⁴
Elastic section modulus (Sx)	103.12 cm³	6.293 in³
Elastic section modulus (Sy)	103.12 cm³	6.293 in³
Plastic section modulus (Zx)	138.93 cm³	8.478 in³
Plastic section modulus (Zy)	138.93 cm³	8.478 in³
Radius of gyration (rx)	4.66 cm	1.835 in
Radius of gyration (ry)	4.66 cm	1.835 in