CHS 88.9x3.75 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 88.9x3.75 steel profile weighs 7.9 kg/m (5.29 lb/ft). Cross-sectional area: 1,003.15 mm². Moment of inertia Ix = 91.093 cm⁴, Iy = 91.093 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.75 mm ≈ 9 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	3.8 mm	0.15 in
Diameter (d)	88.9 mm	3.50 in
Weight	7.9 kg/m	5.29 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,003.15 mm²	1.555 in²
Moment of inertia (Ix)	91.09 cm⁴	2.19 in⁴
Moment of inertia (Iy)	91.09 cm⁴	2.19 in⁴
Elastic section modulus (Sx)	20.49 cm³	1.251 in³
Elastic section modulus (Sy)	20.49 cm³	1.251 in³
Plastic section modulus (Zx)	27.21 cm³	1.660 in³
Plastic section modulus (Zy)	27.21 cm³	1.660 in³
Radius of gyration (rx)	3.01 cm	1.186 in
Radius of gyration (ry)	3.01 cm	1.186 in