Cement truck case

Brief mention. Aluminum water tanks on cement trucks with saddle arrangements — change in stiffness at the saddle creates a fatigue crack location from sloshing liquid.

This is one I've seen a couple of times. I may have told you about the aluminum tanks on cement trucks, but this was one of the details — they had these water tanks on cement trucks to clean off the trucks. They had a saddle arrangement. And right there you have a change in stiffness. So as the liquid is sloshing around in the tank, that change in stiffness, you're going to get a fatigue crack right there at that location. There are lots of design details.