A short column is made by nailing four 1 X 4-in. planks to α 4 X 4-in. timber. Using an allowable stress of 600 psi, determine the largest compressive load P that can be applied at the center of the top section of the timber column as shown if
(a) the column is as described,
(b) plank 1 is removed,
(c) planks 1 and 2 are removed,
(d) planks 1, 2, and 3 are removed,
(e) all planks are removed.
