I have a 12x16 shed, in which is built on a skid. The skid bottom is starting to rot. Is it possible to remove the floor inside the shed, dig out six holes, and put 4x4 posts cemented in, and attach to frame work? Then rebuild the bottom skid, and add the floor back on it. This way it would be off the ground, and connected to a sturdier base. Any help or photos would be appreciated. I hope this makes sense.