I'm not aware of any pickup having a weak tailgate weight rating, but you bring up an interesting question. I would guess Dodge would have an exact number as their recommended limit. I wonder where that data would be available? Just curious...how heavy are you? It would be hard for me to imagine that the tailgate would have an issue supporting you unless you're at level of tabloid front page stories you see sometimes. If a pickup tailgate can support loading ramps to load a Goldwing motorcycle or a heavy ATV like you see in the back of many pickups, I'm guessing you're not that heavy...are you? No sick humor intened, but I'd guess if you're too heavy for the tailgate, you probably couldn't even get into the cab of pickup.
Still, it's an interesting question. I can see a situation where a super heavy person tried to use the tailgate as a diving board or trampoline by jumping up and down on it over and over again might be an issue. Under anything approaching normal use...yes, even loading Goldwings and ATV's...it's hard to imagine a problem. There are bound to be some good internet stories floating around about tailgate failures.
I'll also add that probably most tailgates aren't as strong as the good-ol'-days of an actual hinge connected to the body method via chain or metal linkage, but even that's speculation.
Still, it's an interesting question. I can see a situation where a super heavy person tried to use the tailgate as a diving board or trampoline by jumping up and down on it over and over again might be an issue. Under anything approaching normal use...yes, even loading Goldwings and ATV's...it's hard to imagine a problem. There are bound to be some good internet stories floating around about tailgate failures.
I'll also add that probably most tailgates aren't as strong as the good-ol'-days of an actual hinge connected to the body method via chain or metal linkage, but even that's speculation.