CHS 88.9x1.25 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 88.9x1.25 steel profile weighs 2.7 kg/m (1.81 lb/ft). Cross-sectional area: 344.201 mm². Moment of inertia Ix = 33.061 cm⁴, Iy = 33.061 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.25 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1.3 mm	0.05 in
Diameter (d)	88.9 mm	3.50 in
Weight	2.7 kg/m	1.81 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	344.2 mm²	0.534 in²
Moment of inertia (Ix)	33.06 cm⁴	0.79 in⁴
Moment of inertia (Iy)	33.06 cm⁴	0.79 in⁴
Elastic section modulus (Sx)	7.44 cm³	0.454 in³
Elastic section modulus (Sy)	7.44 cm³	0.454 in³
Plastic section modulus (Zx)	9.6 cm³	0.586 in³
Plastic section modulus (Zy)	9.6 cm³	0.586 in³
Radius of gyration (rx)	3.1 cm	1.220 in
Radius of gyration (ry)	3.1 cm	1.220 in