CHS 48x5.1 AHMSA · Weight & Dimensions

AHMSA, 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 48x5.1 steel profile weighs 5.4 kg/m (3.63 lb/ft). Cross-sectional area: 687.349 mm². Moment of inertia Ix = 16.036 cm⁴, Iy = 16.036 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 5.1 mm ≈ 6 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	5.1 mm	0.20 in
Diameter (d)	48 mm	1.89 in
Weight	5.4 kg/m	3.63 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	687.35 mm²	1.065 in²
Moment of inertia (Ix)	16.04 cm⁴	0.39 in⁴
Moment of inertia (Iy)	16.04 cm⁴	0.39 in⁴
Elastic section modulus (Sx)	6.68 cm³	0.408 in³
Elastic section modulus (Sy)	6.68 cm³	0.408 in³
Plastic section modulus (Zx)	9.43 cm³	0.575 in³
Plastic section modulus (Zy)	9.43 cm³	0.575 in³
Radius of gyration (rx)	1.53 cm	0.601 in
Radius of gyration (ry)	1.53 cm	0.601 in