CHS 70x7 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 70x7 steel profile weighs 10.9 kg/m (7.31 lb/ft). Cross-sectional area: 1,385.442 mm². Moment of inertia Ix = 69.584 cm⁴, Iy = 69.584 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	7 mm	0.28 in
Diameter (d)	70 mm	2.76 in
Weight	10.9 kg/m	7.31 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,385.44 mm²	2.147 in²
Moment of inertia (Ix)	69.58 cm⁴	1.67 in⁴
Moment of inertia (Iy)	69.58 cm⁴	1.67 in⁴
Elastic section modulus (Sx)	19.88 cm³	1.213 in³
Elastic section modulus (Sy)	19.88 cm³	1.213 in³
Plastic section modulus (Zx)	27.9 cm³	1.702 in³
Plastic section modulus (Zy)	27.9 cm³	1.702 in³
Radius of gyration (rx)	2.24 cm	0.882 in
Radius of gyration (ry)	2.24 cm	0.882 in