The beam with hollow box cross-section is supported with a pin at A and a roller at B, where the pin diameter is 1.25 in. The outer dimensions of the box beam are 6 in. high by 8 in. wide and the wall thickness is 0.625 in. The load F0 = 3000 lb. Determine
(a) the bearing stress between the pin at A and the box beam and
(b) the shear stress in the pin at A.