CHS 406x6.3 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 406x6.3 steel profile weighs 62.1 kg/m (41.73 lb/ft). Cross-sectional area: 7,910.876 mm². Moment of inertia Ix = 15,801.953 cm⁴, Iy = 15,801.953 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.3 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	6.3 mm	0.25 in
Diameter (d)	406 mm	15.98 in
Weight	62.1 kg/m	41.73 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	7,910.88 mm²	12.262 in²
Moment of inertia (Ix)	15,801.95 cm⁴	379.64 in⁴
Moment of inertia (Iy)	15,801.95 cm⁴	379.64 in⁴
Elastic section modulus (Sx)	778.42 cm³	47.502 in³
Elastic section modulus (Sy)	778.42 cm³	47.502 in³
Plastic section modulus (Zx)	1,006.57 cm³	61.425 in³
Plastic section modulus (Zy)	1,006.57 cm³	61.425 in³
Radius of gyration (rx)	14.13 cm	5.564 in
Radius of gyration (ry)	14.13 cm	5.564 in