CHS 323.9×11
Circular hollow sections from Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1.
Outline drawn from the published dimensions. Fillets and root radii are not shown.
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Thickness, t | 11 mm | 0.433071 in |
| Outside diameter | 323.9 mm | 12.752 in |
| Inside diameter | 301.9 mm | 11.8858 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 132,000,000 mm⁴ | 317.1313 in⁴ |
| Elastic modulus, Sₓ | 818,000 mm³ | 49.9174 in³ |
| Plastic modulus, Zₓ | 1,080,000 mm³ | 65.9056 in³ |
| Radius of gyration, rₓ | 111 mm | 4.3701 in |
| Distance to top fibre | 161.95 mm | 6.376 in |
| Distance to bottom fibre | 161.95 mm | 6.376 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 132,000,000 mm⁴ | 317.1313 in⁴ |
| Elastic modulus, S_y | 818,000 mm³ | 49.9174 in³ |
| Plastic modulus, Z_y | 1,080,000 mm³ | 65.9056 in³ |
| Radius of gyration, r_y | 111 mm | 4.3701 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 265,000,000 mm⁴ | 636.665 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 84.9 kg/m | 57.0502 lb/ft |