CHS 42x9 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 42x9 steel profile weighs 7.3 kg/m (4.92 lb/ft). Cross-sectional area: 933.053 mm². Moment of inertia Ix = 13.646 cm⁴, Iy = 13.646 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9 mm	0.35 in
Diameter (d)	42 mm	1.65 in
Weight	7.3 kg/m	4.92 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	933.05 mm²	1.446 in²
Moment of inertia (Ix)	13.65 cm⁴	0.33 in⁴
Moment of inertia (Iy)	13.65 cm⁴	0.33 in⁴
Elastic section modulus (Sx)	6.5 cm³	0.397 in³
Elastic section modulus (Sy)	6.5 cm³	0.397 in³
Plastic section modulus (Zx)	10.04 cm³	0.613 in³
Plastic section modulus (Zy)	10.04 cm³	0.613 in³
Radius of gyration (rx)	1.21 cm	0.476 in
Radius of gyration (ry)	1.21 cm	0.476 in