I would assume that solid wood PT boards would be stronger and last longer but I'm getting conflicting evidence online as a lot of people recommend plywood. A pry bar or crow bar may be needed.Will take an hour or so to complete. 3. Replacing the boards is simple with two people. You put one end in the channel and a jack under the trailer in the middle of the board. A pry bar or crow bar may be needed. Will take an hour or so to complete. 3.