CHS 165.1x4.5 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 165.1x4.5 steel profile weighs 17.8 kg/m (11.98 lb/ft). Cross-sectional area: 2,270.429 mm². Moment of inertia Ix = 732.571 cm⁴, Iy = 732.571 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.5 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4.5 mm	0.18 in
Diameter (d)	165.1 mm	6.50 in
Weight	17.8 kg/m	11.98 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,270.43 mm²	3.519 in²
Moment of inertia (Ix)	732.57 cm⁴	17.60 in⁴
Moment of inertia (Iy)	732.57 cm⁴	17.60 in⁴
Elastic section modulus (Sx)	88.74 cm³	5.415 in³
Elastic section modulus (Sy)	88.74 cm³	5.415 in³
Plastic section modulus (Zx)	116.1 cm³	7.085 in³
Plastic section modulus (Zy)	116.1 cm³	7.085 in³
Radius of gyration (rx)	5.68 cm	2.236 in
Radius of gyration (ry)	5.68 cm	2.236 in