CHS 45x4 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 45x4 steel profile weighs 4.0 kg/m (2.71 lb/ft). Cross-sectional area: 515.221 mm². Moment of inertia Ix = 10.929 cm⁴, Iy = 10.929 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4 mm	0.16 in
Diameter (d)	45 mm	1.77 in
Weight	4.0 kg/m	2.71 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	515.22 mm²	0.799 in²
Moment of inertia (Ix)	10.93 cm⁴	0.26 in⁴
Moment of inertia (Iy)	10.93 cm⁴	0.26 in⁴
Elastic section modulus (Sx)	4.86 cm³	0.296 in³
Elastic section modulus (Sy)	4.86 cm³	0.296 in³
Plastic section modulus (Zx)	6.75 cm³	0.412 in³
Plastic section modulus (Zy)	6.75 cm³	0.412 in³
Radius of gyration (rx)	1.46 cm	0.573 in
Radius of gyration (ry)	1.46 cm	0.573 in