CHS 38x4 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 38x4 steel profile weighs 3.4 kg/m (2.25 lb/ft). Cross-sectional area: 427.257 mm². Moment of inertia Ix = 6.259 cm⁴, Iy = 6.259 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)	38 mm	1.50 in
Weight	3.4 kg/m	2.25 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	427.26 mm²	0.662 in²
Moment of inertia (Ix)	6.26 cm⁴	0.15 in⁴
Moment of inertia (Iy)	6.26 cm⁴	0.15 in⁴
Elastic section modulus (Sx)	3.29 cm³	0.201 in³
Elastic section modulus (Sy)	3.29 cm³	0.201 in³
Plastic section modulus (Zx)	4.65 cm³	0.283 in³
Plastic section modulus (Zy)	4.65 cm³	0.283 in³
Radius of gyration (rx)	1.21 cm	0.477 in
Radius of gyration (ry)	1.21 cm	0.477 in