CHS 45x3 GOST · Weight & Dimensions

GOST, 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 45x3 steel profile weighs 3.1 kg/m (2.09 lb/ft). Cross-sectional area: 395.841 mm². Moment of inertia Ix = 8.773 cm⁴, Iy = 8.773 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	3 mm	0.12 in
Diameter (d)	45 mm	1.77 in
Weight	3.1 kg/m	2.09 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	395.84 mm²	0.614 in²
Moment of inertia (Ix)	8.77 cm⁴	0.21 in⁴
Moment of inertia (Iy)	8.77 cm⁴	0.21 in⁴
Elastic section modulus (Sx)	3.9 cm³	0.238 in³
Elastic section modulus (Sy)	3.9 cm³	0.238 in³
Plastic section modulus (Zx)	5.3 cm³	0.323 in³
Plastic section modulus (Zy)	5.3 cm³	0.323 in³
Radius of gyration (rx)	1.49 cm	0.586 in
Radius of gyration (ry)	1.49 cm	0.586 in