Back when I was a bunch younger and more impressionable, the outfit I got started at was pretty flexible with loaded weights. If you hauled an extra 5 ton on each load at the end of the day you had a free load! The heaviest load I remember was 105,000 on a Mack R model tri axle. (East coast, legal for like 75k or so, maybe 80 in NJ) They had just gotten a new loader that had the load cells in the boom. We were hauling pond silt to a pit a few miles down the road, and the boss's son in law and I got into a competition to see wo could get the most on the truck. The last two loads were around that 105k mark, which was all we could stuff into the bodies. That pretty much ended the competition because we both scared ourselves driving those loads down the road. I still remember that little Mack straining to make 40mph as it wallowed down the road . . .