I'm a bit rusty on partial uniform loading on a pin. I want to find the minimum diameter a cold rolled steel pin has to be using a factor of safety of 2 with a loading of 25000 lbs. The pin in the picture is welded between two plates (the right plate bends in and is welded to the left plate below the pin) . These plates are welded to a box (another pin is located on the opposite side of the box). A hook grabs onto this pin. I've tried finding equations regarding partial uniform loading. The equations I've turned up show the center piece the same width as the gap.