CHS 70x2.9 Tecnometal · Weight & Dimensions

Tecnometal, cold-formed sections (Spain) · 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 70x2.9 steel profile weighs 4.8 kg/m (3.23 lb/ft). Cross-sectional area: 611.323 mm². Moment of inertia Ix = 34.47 cm⁴, Iy = 34.47 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 2.9 mm ≈ 11 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	2.9 mm	0.11 in
Diameter (d)	70 mm	2.76 in
Weight	4.8 kg/m	3.23 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	611.32 mm²	0.948 in²
Moment of inertia (Ix)	34.47 cm⁴	0.83 in⁴
Moment of inertia (Iy)	34.47 cm⁴	0.83 in⁴
Elastic section modulus (Sx)	9.85 cm³	0.601 in³
Elastic section modulus (Sy)	9.85 cm³	0.601 in³
Plastic section modulus (Zx)	13.07 cm³	0.797 in³
Plastic section modulus (Zy)	13.07 cm³	0.797 in³
Radius of gyration (rx)	2.37 cm	0.935 in
Radius of gyration (ry)	2.37 cm	0.935 in