CHS 323.9x9.53 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 323.9x9.53 steel profile weighs 73.9 kg/m (49.65 lb/ft). Cross-sectional area: 9,412.042 mm². Moment of inertia Ix = 11,637.91 cm⁴, Iy = 11,637.91 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	9.5 mm	0.38 in
Diameter (d)	323.9 mm	12.75 in
Weight	73.9 kg/m	49.65 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	9,412.04 mm²	14.589 in²
Moment of inertia (Ix)	11,637.91 cm⁴	279.60 in⁴
Moment of inertia (Iy)	11,637.91 cm⁴	279.60 in⁴
Elastic section modulus (Sx)	718.61 cm³	43.853 in³
Elastic section modulus (Sy)	718.61 cm³	43.853 in³
Plastic section modulus (Zx)	942.12 cm³	57.492 in³
Plastic section modulus (Zy)	942.12 cm³	57.492 in³
Radius of gyration (rx)	11.12 cm	4.378 in
Radius of gyration (ry)	11.12 cm	4.378 in