CHS 40x1 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 40x1 steel profile weighs 1.0 kg/m (0.65 lb/ft). Cross-sectional area: 122.522 mm². Moment of inertia Ix = 2.331 cm⁴, Iy = 2.331 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)	40 mm	1.57 in
Weight	1.0 kg/m	0.65 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	122.52 mm²	0.190 in²
Moment of inertia (Ix)	2.33 cm⁴	0.06 in⁴
Moment of inertia (Iy)	2.33 cm⁴	0.06 in⁴
Elastic section modulus (Sx)	1.17 cm³	0.071 in³
Elastic section modulus (Sy)	1.17 cm³	0.071 in³
Plastic section modulus (Zx)	1.52 cm³	0.093 in³
Plastic section modulus (Zy)	1.52 cm³	0.093 in³
Radius of gyration (rx)	1.38 cm	0.543 in
Radius of gyration (ry)	1.38 cm	0.543 in