An Eagle Cap Camper Snapped A Ram 3500 Dually In Half, Mopar Refuses $17,000 Repair Bill

What size truck do you guys think that Eagle Cap is designed to be mounted on? With that overhang in the rear, and the water and toilet in the rear area (as someone suggested), I would think that sucker is too big for ANY 1 ton truck. If that's the case, what vehicle did Eagle design that model for?