Sandy & Shirley wrote:
The Fifth Wheel required tow 2 x 10’s under one side and we know from experience that even pressure treated lumber will rot when placed directly on black top for long periods. The top board was generally OK while the bottom board began to rot.
I've always used wood for side to side leveling our trailer on the driveway and can't say I ever recall it rotting. That said, if you're otherwise happy with using wood for leveling but do seem to have this rotting issue wouldn't the simplest solution be to just replace the wood as needed with new pieces? :h