1.15 A column with the cross section shown in Figure P1.15 supports a building. The column is attached to a metal plate and bolted into the concrete foundation. The load P is estimated at 750 kN. The metal plate dimensions are 300 mm x 300 mm × 20 mm. Determine: (a) the com- pressive stress in the column; (b) the average bearing stress between the metal plate and the concrete 10 mm P 160 mm -10 mm 160 mm Metal Figure P1.15 10 mm, Concrete