Question: A rectangular column with cross-sectional dimensions b and is pin-supported at ends A and C (see figure). AT midheight, the column is restrained in the

A rectangular column with cross-sectional dimensions b and is pin-supported at ends A and C (see figure). AT midheight, the column is restrained in the plane of the figure but is free to deflect perpendicular to the plane of the figure.
Determine the ratio h/b such that the critical load is the same for buckling in the two principal planes of the column.

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