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Stability analysis and design have always played a key role in the process of verification of steel structures. The possible analysis methods and design procedures have a long history with plentiful literature providing various proposals for the engineers. This paper concentrates on the use of different types of eigenvalue analysis as a simple and powerful tool for stability design. Nowadays almost all the engineering software products have some kind of eigenvalue analysis options so these tools are easily available for the practicing engineers providing them a deeper look on the structural behavior. Various types of application possibilities are reviewed and new methods are proposed supporting the most up-to-date standard procedures of different levels from the isolated member design to the partial or global structural stability design. The suitable theoretical (both mathematical and mechanical) background is developed and the numerical procedure is implemented. The technique is applicable for a wide range of structural types and stability problems making the automatic effective length calculation possible in general without the use of any iterative process or tabulated values for certain cases. An application example is presented showing the comprehensiveness of the methods, and special efficiency indicators are presented in order to supply information about the adequacy of the applied design method.
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