CHS 40x1.2 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 40x1.2 steel profile weighs 1.1 kg/m (0.77 lb/ft). Cross-sectional area: 146.273 mm². Moment of inertia Ix = 2.755 cm⁴, Iy = 2.755 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1.2 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	1.2 mm	0.05 in
Diameter (d)	40 mm	1.57 in
Weight	1.1 kg/m	0.77 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	146.27 mm²	0.227 in²
Moment of inertia (Ix)	2.76 cm⁴	0.07 in⁴
Moment of inertia (Iy)	2.76 cm⁴	0.07 in⁴
Elastic section modulus (Sx)	1.38 cm³	0.084 in³
Elastic section modulus (Sy)	1.38 cm³	0.084 in³
Plastic section modulus (Zx)	1.81 cm³	0.110 in³
Plastic section modulus (Zy)	1.81 cm³	0.110 in³
Radius of gyration (rx)	1.37 cm	0.540 in
Radius of gyration (ry)	1.37 cm	0.540 in