CHS 70x1 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 70x1 steel profile weighs 1.7 kg/m (1.14 lb/ft). Cross-sectional area: 216.77 mm². Moment of inertia Ix = 12.903 cm⁴, Iy = 12.903 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1 mm	0.04 in
Diameter (d)	70 mm	2.76 in
Weight	1.7 kg/m	1.14 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	216.77 mm²	0.336 in²
Moment of inertia (Ix)	12.9 cm⁴	0.31 in⁴
Moment of inertia (Iy)	12.9 cm⁴	0.31 in⁴
Elastic section modulus (Sx)	3.69 cm³	0.225 in³
Elastic section modulus (Sy)	3.69 cm³	0.225 in³
Plastic section modulus (Zx)	4.76 cm³	0.291 in³
Plastic section modulus (Zy)	4.76 cm³	0.291 in³
Radius of gyration (rx)	2.44 cm	0.961 in
Radius of gyration (ry)	2.44 cm	0.961 in