So as you can see, the drawing I've attached shows two bolts through those 3 plates. There are the shown forces acting on the plates, and the maximum allowed shear stress is given to be 110 MPa. You're supposed to determine the minimum diameter required for the bolts. Also, the forces are assumed to be evenly distributed amongst the two bolts. So I can ask my TA how to solve this problem, so I'm not entirely asking for a solution...What I want to know is really the theory of this. If I'm looking at the bolt alone, there are 3 forces acting on it, no? If that's the case, then how do I go about applying t = V/A? Can I get an explanation of how to look at the bolt and determine the shear force? Thanks!