CHS 323.9x6.35 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 323.9x6.35 steel profile weighs 49.7 kg/m (33.42 lb/ft). Cross-sectional area: 6,334.841 mm². Moment of inertia Ix = 7,988.102 cm⁴, Iy = 7,988.102 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)	323.9 mm	12.75 in
Weight	49.7 kg/m	33.42 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	6,334.84 mm²	9.819 in²
Moment of inertia (Ix)	7,988.1 cm⁴	191.91 in⁴
Moment of inertia (Iy)	7,988.1 cm⁴	191.91 in⁴
Elastic section modulus (Sx)	493.24 cm³	30.100 in³
Elastic section modulus (Sy)	493.24 cm³	30.100 in³
Plastic section modulus (Zx)	640.41 cm³	39.080 in³
Plastic section modulus (Zy)	640.41 cm³	39.080 in³
Radius of gyration (rx)	11.23 cm	4.421 in
Radius of gyration (ry)	11.23 cm	4.421 in