CHS 70x8 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 70x8 steel profile weighs 12.2 kg/m (8.22 lb/ft). Cross-sectional area: 1,558.23 mm². Moment of inertia Ix = 76.12 cm⁴, Iy = 76.12 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	8 mm	0.31 in
Diameter (d)	70 mm	2.76 in
Weight	12.2 kg/m	8.22 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,558.23 mm²	2.415 in²
Moment of inertia (Ix)	76.12 cm⁴	1.83 in⁴
Moment of inertia (Iy)	76.12 cm⁴	1.83 in⁴
Elastic section modulus (Sx)	21.75 cm³	1.327 in³
Elastic section modulus (Sy)	21.75 cm³	1.327 in³
Plastic section modulus (Zx)	30.92 cm³	1.887 in³
Plastic section modulus (Zy)	30.92 cm³	1.887 in³
Radius of gyration (rx)	2.21 cm	0.870 in
Radius of gyration (ry)	2.21 cm	0.870 in