(7) Three identical wooden boards are bolted together to form the built-up beam with cross section shown. The longitudinal spacing between the bolts is s = 6 in. and the vertical shear force applied 2 in. on the beam is V= 4 kips. If the allowable shear stress in the bolt is 10 ksi, determine the smallest permissible diameter of the bolt. 2 in. Also determine the largest shear stress in the wood. Ans: 0.553 in, 0.7 ksi 2 in. 1 in. 1 in. 1 in