My '59 Viking has a GVW rating of 14,000 lbs. When my truck is empty, it weighs 6,840 lbs. That would allow for a 7,160 lb payload.
I have hauled as much as 11,000 lbs. But I could tell that I was overloaded, just by the way that it handled and stopped. Not a wise thing to do. I could have received a ticket. I didn't load it, and only asked for 3 1/2 tons, but I can hear the officer now saying, "tell it to the judge".
John