CHS 101.6x4.78 CISC · Weight & Dimensions

CISC, 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 101.6x4.78 steel profile weighs 11.4 kg/m (7.67 lb/ft). Cross-sectional area: 1,453.928 mm². Moment of inertia Ix = 170.781 cm⁴, Iy = 170.781 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.78 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4.8 mm	0.19 in
Diameter (d)	101.6 mm	4.00 in
Weight	11.4 kg/m	7.67 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,453.93 mm²	2.254 in²
Moment of inertia (Ix)	170.78 cm⁴	4.10 in⁴
Moment of inertia (Iy)	170.78 cm⁴	4.10 in⁴
Elastic section modulus (Sx)	33.62 cm³	2.052 in³
Elastic section modulus (Sy)	33.62 cm³	2.052 in³
Plastic section modulus (Zx)	44.84 cm³	2.737 in³
Plastic section modulus (Zy)	44.84 cm³	2.737 in³
Radius of gyration (rx)	3.43 cm	1.349 in
Radius of gyration (ry)	3.43 cm	1.349 in