I experimented column buckling analysis with different two load conditions in MSC.Nastran. In the first condition, force was loaded from the downward direction at the top of the column. In the second case, force was inflicted toward horizontal direction. But P[critical] of two cases are almost same. (at least same order) I thought that scale factor of first case must be much larger than second case. Because horizontal force can bend the column more easily !! Is my intuition wrong ?