we ran into that when it was Express1 more so...anything over 2,000 lbs was a sprinter load...the rate was bumped from 80 to 1.00 0r 1.05....
Back in '97, when I was a newbie (that was when I switched from big rigs to CV) with TNT, while sitting and waiting and freezing to death nearby Windy City, I told the dispatch that I'm gonna take anything, just to keep moving. The guy told me that he has a ST load, it fits in my van, but it's heavy. It was 4200 lbs and I took it. The point is that they never paid me as a ST load, but CV load, which at that time they were paying $.65/mi. It was the first and last time when I accepted an overweight load...