CHS 40x2.5 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 40x2.5 steel profile weighs 2.3 kg/m (1.55 lb/ft). Cross-sectional area: 294.524 mm². Moment of inertia Ix = 5.2 cm⁴, Iy = 5.2 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)	40 mm	1.57 in
Weight	2.3 kg/m	1.55 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	294.52 mm²	0.457 in²
Moment of inertia (Ix)	5.2 cm⁴	0.12 in⁴
Moment of inertia (Iy)	5.2 cm⁴	0.12 in⁴
Elastic section modulus (Sx)	2.6 cm³	0.159 in³
Elastic section modulus (Sy)	2.6 cm³	0.159 in³
Plastic section modulus (Zx)	3.52 cm³	0.215 in³
Plastic section modulus (Zy)	3.52 cm³	0.215 in³
Radius of gyration (rx)	1.33 cm	0.523 in
Radius of gyration (ry)	1.33 cm	0.523 in