The trailer has some length to it, it's at least 7k, I've been trying to remember what our old twin screw dump truck we used to have weighed, for some reason I keep thinking around 24k. And some of those trailers do have 12k axles. Either way it is quite a load. I'm betting the dump truck was broke down and they were just glad to get it on the trailer,. I can't see anyone that has a setup like that not understanding weight distribution. Those long trailers like that suck to get weight distributed correctly sometimes.