CHS 406.4×11
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 | 406.4 mm | 16 in |
| Inside diameter | 384.4 mm | 15.1339 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 267,000,000 mm⁴ | 641.4701 in⁴ |
| Elastic modulus, Sₓ | 1,320,000 mm³ | 80.5513 in³ |
| Plastic modulus, Zₓ | 1,720,000 mm³ | 104.9608 in³ |
| Radius of gyration, rₓ | 140 mm | 5.5118 in |
| Distance to top fibre | 203.2 mm | 8 in |
| Distance to bottom fibre | 203.2 mm | 8 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 267,000,000 mm⁴ | 641.4701 in⁴ |
| Elastic modulus, S_y | 1,320,000 mm³ | 80.5513 in³ |
| Plastic modulus, Z_y | 1,720,000 mm³ | 104.9608 in³ |
| Radius of gyration, r_y | 140 mm | 5.5118 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 534,000,000 mm⁴ | 1,282.94 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 107 kg/m | 71.9007 lb/ft |