A rectangular wooden column has the cross section shown. If the column is (6 mathrm{ft}) long and

Question:

A rectangular wooden column has the cross section shown. If the column is $6 \mathrm{ft}$ long and subjected to an axial force of $P=15$ kip, determine the required minimum dimension $a$ of its cross-sectional area to the nearest $\frac{1}{16}$ in. so that the column can safely support the loading. The column is pinned at both ends.

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