1. A 3/4 in - 16 UNF SAE grade 5 bolt is subjected to a load P of 6 kip in a tension joint.
The initial bolt tension = 25 kip. The bolt and joint stiffnesses are kb = 6.50 and km =
13.8 Mlbf/in, respectively. Determine the preload and service load stresses in the bolt.
Compare these to the SAE minimum proof strength of the bolt.