CHS 406.4x6.35 CISC · Weight & Dimensions

CISC, 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 406.4x6.35 steel profile weighs 62.6 kg/m (42.10 lb/ft). Cross-sectional area: 7,980.643 mm². Moment of inertia Ix = 15,969.299 cm⁴, Iy = 15,969.299 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.35 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Thickness (t)	6.3 mm	0.25 in
Diameter (d)	406.4 mm	16.00 in
Weight	62.6 kg/m	42.10 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	7,980.64 mm²	12.370 in²
Moment of inertia (Ix)	15,969.3 cm⁴	383.66 in⁴
Moment of inertia (Iy)	15,969.3 cm⁴	383.66 in⁴
Elastic section modulus (Sx)	785.89 cm³	47.958 in³
Elastic section modulus (Sy)	785.89 cm³	47.958 in³
Plastic section modulus (Zx)	1,016.34 cm³	62.021 in³
Plastic section modulus (Zy)	1,016.34 cm³	62.021 in³
Radius of gyration (rx)	14.15 cm	5.569 in
Radius of gyration (ry)	14.15 cm	5.569 in