CHS 88.9x4.4 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 88.9x4.4 steel profile weighs 9.2 kg/m (6.16 lb/ft). Cross-sectional area: 1,168.044 mm². Moment of inertia Ix = 104.534 cm⁴, Iy = 104.534 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.4 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4.4 mm	0.17 in
Diameter (d)	88.9 mm	3.50 in
Weight	9.2 kg/m	6.16 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,168.04 mm²	1.810 in²
Moment of inertia (Ix)	104.53 cm⁴	2.51 in⁴
Moment of inertia (Iy)	104.53 cm⁴	2.51 in⁴
Elastic section modulus (Sx)	23.52 cm³	1.435 in³
Elastic section modulus (Sy)	23.52 cm³	1.435 in³
Plastic section modulus (Zx)	31.45 cm³	1.919 in³
Plastic section modulus (Zy)	31.45 cm³	1.919 in³
Radius of gyration (rx)	2.99 cm	1.178 in
Radius of gyration (ry)	2.99 cm	1.178 in