CHS 88.9x3.5 SAISC · Weight & Dimensions

SAISC, cold-formed sections · 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 88.9x3.5 steel profile weighs 7.4 kg/m (4.95 lb/ft). Cross-sectional area: 939.022 mm². Moment of inertia Ix = 85.749 cm⁴, Iy = 85.749 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.5 mm ≈ 10 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	3.5 mm	0.14 in
Diameter (d)	88.9 mm	3.50 in
Weight	7.4 kg/m	4.95 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	939.02 mm²	1.455 in²
Moment of inertia (Ix)	85.75 cm⁴	2.06 in⁴
Moment of inertia (Iy)	85.75 cm⁴	2.06 in⁴
Elastic section modulus (Sx)	19.29 cm³	1.177 in³
Elastic section modulus (Sy)	19.29 cm³	1.177 in³
Plastic section modulus (Zx)	25.54 cm³	1.559 in³
Plastic section modulus (Zy)	25.54 cm³	1.559 in³
Radius of gyration (rx)	3.02 cm	1.190 in
Radius of gyration (ry)	3.02 cm	1.190 in