CHS 406.4×12.5
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 | 12.5 mm | 0.492126 in |
| Outside diameter | 406.4 mm | 16 in |
| Inside diameter | 381.4 mm | 15.0157 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 300,000,000 mm⁴ | 720.7529 in⁴ |
| Elastic modulus, Sₓ | 1,480,000 mm³ | 90.3151 in³ |
| Plastic modulus, Zₓ | 1,940,000 mm³ | 118.3861 in³ |
| Radius of gyration, rₓ | 139 mm | 5.4724 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 | 300,000,000 mm⁴ | 720.7529 in⁴ |
| Elastic modulus, S_y | 1,480,000 mm³ | 90.3151 in³ |
| Plastic modulus, Z_y | 1,940,000 mm³ | 118.3861 in³ |
| Radius of gyration, r_y | 139 mm | 5.4724 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 601,000,000 mm⁴ | 1,443.908 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 121 kg/m | 81.3082 lb/ft |