For your 2016 Ram 5500, you will need to have some kind of brackets fabricated to install the Reese Low-Profile 5th Wheel Trailer Hitch # RP30054.
When the truck's frame is wider than the 5th wheel hitch, brackets need to be fabricated to secure the hitch to both the truck deck and the frame. Per the installation instructions, the hitch needs to be installed through a 1/2 inch steel plate under the deck, the 1/2 inch steel plate must be welded to brackets that are bolted to the truck... view full answer...