The beam is made from southern pine and is supported by base plates resting on brick wor...

The beam is made from southern pine and is supported by base plates resting on brick work. If the allowable bearing stresses for the materials are (σ_pine)_allow = 2.81 ksi and (σ_brick)allow = 6.70 ksi , determine the required length of the base plates at A and B to the nearest inch in order to support the load shown. The plates are 3 in. wide.