CHS 25x4 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 25x4 steel profile weighs 2.1 kg/m (1.39 lb/ft). Cross-sectional area: 263.894 mm². Moment of inertia Ix = 1.507 cm⁴, Iy = 1.507 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)	25 mm	0.98 in
Weight	2.1 kg/m	1.39 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	263.89 mm²	0.409 in²
Moment of inertia (Ix)	1.51 cm⁴	0.04 in⁴
Moment of inertia (Iy)	1.51 cm⁴	0.04 in⁴
Elastic section modulus (Sx)	1.21 cm³	0.074 in³
Elastic section modulus (Sy)	1.21 cm³	0.074 in³
Plastic section modulus (Zx)	1.79 cm³	0.109 in³
Plastic section modulus (Zy)	1.79 cm³	0.109 in³
Radius of gyration (rx)	0.76 cm	0.298 in
Radius of gyration (ry)	0.76 cm	0.298 in