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When member buckling data from stability are defined, the critical buckling load Ncr for a prismatic member is calculated as follows:
Using Euler’s formula, the buckling ratio k can then be determined:
With:
| λ | Critical load factor for the selected stability combination |
| NEd | Design loading in the member |
| E | Modulus of Young |
| I | Moment of inertia |
| s | Member length |
In case of a non-prismatic member, the moment of inertia is taken in the middle of the element.