Internal Reactions: Stress for Axial Loads 235 0.44 The bell-crank lever shown is used to change the di- rection and magnitude of a force. The pin at B has a diameter of 0.65 in., and the pins at A and D have di- ameters of 0.5 in. The ultimate normal stress is 36 ksi in the link AD, and the ultimate shear stress is 14.5 ksi in the pins. What is the allowable load P if the factor of safety is 3.5? 1/2 in. 1/2 in. B 12 in. 8 in. 1.0 in. P 1:01 8 in. PROB. 10.44 Яe.or