CHS 70x2.5 Hiasa · Weight & Dimensions

Hiasa, 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 70x2.5 steel profile weighs 4.2 kg/m (2.80 lb/ft). Cross-sectional area: 530.144 mm². Moment of inertia Ix = 30.235 cm⁴, Iy = 30.235 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 2.5 mm ≈ 12 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	2.5 mm	0.10 in
Diameter (d)	70 mm	2.76 in
Weight	4.2 kg/m	2.80 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	530.14 mm²	0.822 in²
Moment of inertia (Ix)	30.23 cm⁴	0.73 in⁴
Moment of inertia (Iy)	30.23 cm⁴	0.73 in⁴
Elastic section modulus (Sx)	8.64 cm³	0.527 in³
Elastic section modulus (Sy)	8.64 cm³	0.527 in³
Plastic section modulus (Zx)	11.4 cm³	0.695 in³
Plastic section modulus (Zy)	11.4 cm³	0.695 in³
Radius of gyration (rx)	2.39 cm	0.940 in
Radius of gyration (ry)	2.39 cm	0.940 in