Every truck has a sticker on the door jam that tells you just what that truck can haul.
My friends Dodge Diesel 2500 has a payload 2100lb that includes everything, passengers, any cargo, camper, trailer tongue weight.
A heavy trailer will eat up more than half of that capacity 1200 to 1500 lbs add passengers and gear and your done before you put anything in the bed
This Ram 3500 is awaiting a $17,000 repair job after an enormous slide-in camper snapped its frame.
www.thedrive.com
Even over loaded I would not expect catastrophic failure like that. I suspect there's a issue with the frame.