CHS 88.9x1.55 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 88.9x1.55 steel profile weighs 3.3 kg/m (2.24 lb/ft). Cross-sectional area: 425.348 mm². Moment of inertia Ix = 40.58 cm⁴, Iy = 40.58 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.55 mm ≈ 16 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1.6 mm	0.06 in
Diameter (d)	88.9 mm	3.50 in
Weight	3.3 kg/m	2.24 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	425.35 mm²	0.659 in²
Moment of inertia (Ix)	40.58 cm⁴	0.97 in⁴
Moment of inertia (Iy)	40.58 cm⁴	0.97 in⁴
Elastic section modulus (Sx)	9.13 cm³	0.557 in³
Elastic section modulus (Sy)	9.13 cm³	0.557 in³
Plastic section modulus (Zx)	11.83 cm³	0.722 in³
Plastic section modulus (Zy)	11.83 cm³	0.722 in³
Radius of gyration (rx)	3.09 cm	1.216 in
Radius of gyration (ry)	3.09 cm	1.216 in