I cut mine all 12in long and store them in a roughneck container. To level under the trailer wheels i place them sideways to cover 12in wide and sometimes 2 to 3 layers high. I also use scrap 8in pressure treated lumber but they split easier.
I use my 2 x 6 for all my blocking needs for jacking my unit by the frame to work on the wheels. Even use same blocking to work on my truck. So many uses for my blocks. Never used plastic and never will.
Barbara and Laurent, Hartland Big Country 3500RL. 39 ft long and 15500 GVW.
2005 Ford F250 SD, XL F250 4x4, Long Box, 6.0L Diesel, 6 Speed Stick, Hypertech Max Energy for Fuel mileage of 21 MPusG empty, 12.6 MPusG pulling the BC. ScangaugeII for display..