CHS 88.9x5 · 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 88.9x5 steel profile weighs 10.3 kg/m (6.92 lb/ft). Cross-sectional area: 1,317.9 mm². Moment of inertia Ix = 116.37 cm⁴, Iy = 116.37 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 5 mm ≈ 6 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	5 mm	0.20 in
Diameter (d)	88.9 mm	3.50 in
Weight	10.3 kg/m	6.92 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,317.9 mm²	2.043 in²
Moment of inertia (Ix)	116.37 cm⁴	2.80 in⁴
Moment of inertia (Iy)	116.37 cm⁴	2.80 in⁴
Elastic section modulus (Sx)	26.18 cm³	1.598 in³
Elastic section modulus (Sy)	26.18 cm³	1.598 in³
Plastic section modulus (Zx)	35.24 cm³	2.150 in³
Plastic section modulus (Zy)	35.24 cm³	2.150 in³
Radius of gyration (rx)	2.97 cm	1.169 in
Radius of gyration (ry)	2.97 cm	1.169 in