CHS 88.9x11.1 Açotubo · Weight & Dimensions

Açotubo, 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 88.9x11.1 steel profile weighs 21.3 kg/m (14.31 lb/ft). Cross-sectional area: 2,713.017 mm². Moment of inertia Ix = 209.447 cm⁴, Iy = 209.447 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	11.1 mm	0.44 in
Diameter (d)	88.9 mm	3.50 in
Weight	21.3 kg/m	14.31 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,713.02 mm²	4.205 in²
Moment of inertia (Ix)	209.45 cm⁴	5.03 in⁴
Moment of inertia (Iy)	209.45 cm⁴	5.03 in⁴
Elastic section modulus (Sx)	47.12 cm³	2.875 in³
Elastic section modulus (Sy)	47.12 cm³	2.875 in³
Plastic section modulus (Zx)	67.64 cm³	4.128 in³
Plastic section modulus (Zy)	67.64 cm³	4.128 in³
Radius of gyration (rx)	2.78 cm	1.094 in
Radius of gyration (ry)	2.78 cm	1.094 in