Hey Dave, I remember some of the old guys that used to have some of them old stationary axle, step decks. Before the 45' and 48' footers came along, them used to be real neck breakers.
Sense you couldn't slide the axles up the main part of the load was in the middle, and the flex of the floor would just beat you to death. You wouldn't think that little flex would mean that much, but once it was transfered all them feet to the cab, it really got to shaking by the time it got to the cab. It was really hard to get a load that road good.
You would hit a big bump, and keep feeling it minutes later, and usually if the guy could only afford a trailer like that, he had a tractor with only a solid rubber block Hendrickson suspension on his tractor to, and never could find anybody to take a ride with him to the truck stop, during off time hours.
Kerry