I am going to build some garage shelves. One long edge will be supported by horizontal battons fixed to the wall. The other long edge will have battons supported by vertical wooden legs. The vertical supporting legs will be 2x4s (i.e. approx 50mm x 100mm).
The bottom of the legs will be on a concrete floor and I am concerned about water on the garage floor causing the bottom of the legs to rot. What are the options for preventing water damage to the bottom of the legs? I am thinking of something to put between the concrete floor and bottom of the leg. I am not keen on any kind of painted treatment.