@JLT try this http://www.thetruckersreport.com/truckingindustryforum/threads/mercer-transportation.184426/
And this http://www.thetruckersreport.com/truckingindustryforum/threads/why-do-some-fail-mercer.245215/ That should keep you busy for awhile.
I met a guy pulling something like that and the load from Galveston Texas to Morgantown West Virginia paid the truck $96,000 it took him two weeks to make the trip going really slow and he was being paid $1,000 a day detention while the customer tried to figure out how he was going to get this 200000 pound contraption up the side of a mountain because it wasn't going to go up on the guys trailer.
I seen that trailer it has a 3306 cat in the back to run all the hydraulics there's a platform for a guy to steer the back in front of the motor