CHS 88.9x1.9 Gerdau · Weight & Dimensions

Gerdau, tubes · 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 88.9x1.9 steel profile weighs 4.1 kg/m (2.74 lb/ft). Cross-sectional area: 519.305 mm². Moment of inertia Ix = 49.156 cm⁴, Iy = 49.156 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.9 mm ≈ 14 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1.9 mm	0.07 in
Diameter (d)	88.9 mm	3.50 in
Weight	4.1 kg/m	2.74 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	519.31 mm²	0.805 in²
Moment of inertia (Ix)	49.16 cm⁴	1.18 in⁴
Moment of inertia (Iy)	49.16 cm⁴	1.18 in⁴
Elastic section modulus (Sx)	11.06 cm³	0.675 in³
Elastic section modulus (Sy)	11.06 cm³	0.675 in³
Plastic section modulus (Zx)	14.38 cm³	0.878 in³
Plastic section modulus (Zy)	14.38 cm³	0.878 in³
Radius of gyration (rx)	3.08 cm	1.211 in
Radius of gyration (ry)	3.08 cm	1.211 in