CHS 88.9x6.4 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 88.9x6.4 steel profile weighs 13.0 kg/m (8.75 lb/ft). Cross-sectional area: 1,658.761 mm². Moment of inertia Ix = 141.974 cm⁴, Iy = 141.974 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.4 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	6.4 mm	0.25 in
Diameter (d)	88.9 mm	3.50 in
Weight	13.0 kg/m	8.75 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,658.76 mm²	2.571 in²
Moment of inertia (Ix)	141.97 cm⁴	3.41 in⁴
Moment of inertia (Iy)	141.97 cm⁴	3.41 in⁴
Elastic section modulus (Sx)	31.94 cm³	1.949 in³
Elastic section modulus (Sy)	31.94 cm³	1.949 in³
Plastic section modulus (Zx)	43.65 cm³	2.664 in³
Plastic section modulus (Zy)	43.65 cm³	2.664 in³
Radius of gyration (rx)	2.93 cm	1.152 in
Radius of gyration (ry)	2.93 cm	1.152 in