CHS 323.9x7.95 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 323.9x7.95 steel profile weighs 61.9 kg/m (41.62 lb/ft). Cross-sectional area: 7,891.06 mm². Moment of inertia Ix = 9,852.739 cm⁴, Iy = 9,852.739 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Thickness (t)	8.0 mm	0.31 in
Diameter (d)	323.9 mm	12.75 in
Weight	61.9 kg/m	41.62 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	7,891.06 mm²	12.231 in²
Moment of inertia (Ix)	9,852.74 cm⁴	236.71 in⁴
Moment of inertia (Iy)	9,852.74 cm⁴	236.71 in⁴
Elastic section modulus (Sx)	608.38 cm³	37.126 in³
Elastic section modulus (Sy)	608.38 cm³	37.126 in³
Plastic section modulus (Zx)	793.77 cm³	48.439 in³
Plastic section modulus (Zy)	793.77 cm³	48.439 in³
Radius of gyration (rx)	11.17 cm	4.399 in
Radius of gyration (ry)	11.17 cm	4.399 in