CHS 40x4 NBE EA-95 · Weight & Dimensions

NBE EA-95, 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 40x4 steel profile weighs 3.5 kg/m (2.39 lb/ft). Cross-sectional area: 452.389 mm². Moment of inertia Ix = 7.419 cm⁴, Iy = 7.419 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4 mm ≈ 8 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	4 mm	0.16 in
Diameter (d)	40 mm	1.57 in
Weight	3.5 kg/m	2.39 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	452.39 mm²	0.701 in²
Moment of inertia (Ix)	7.42 cm⁴	0.18 in⁴
Moment of inertia (Iy)	7.42 cm⁴	0.18 in⁴
Elastic section modulus (Sx)	3.71 cm³	0.226 in³
Elastic section modulus (Sy)	3.71 cm³	0.226 in³
Plastic section modulus (Zx)	5.21 cm³	0.318 in³
Plastic section modulus (Zy)	5.21 cm³	0.318 in³
Radius of gyration (rx)	1.28 cm	0.504 in
Radius of gyration (ry)	1.28 cm	0.504 in