Q4) A timber column, 8 in. x 8 in. in cross section, is reinforced on each side by a steel plate 8 in. wide and "t" in. thick. Determine the thickness t so that the column will support an axial load of 300 kips without exceeding a maximum timber stress of 1200 psi or a maximum steel stress of 20 ksi. The moduli of elasticity are 1.5 × 10° psi for timber, and 29 × 10° psi for steel. 8 300 k 있 8 Figure 4