[72c20customcamper]

My 24 x30 garage has a cement floor since it's a permanent structure according to the town me and a grew of my relatives did the floor. 3 trucks because I pourd it 8 inches. Used a power float. my dad's pole barn 30 x 50 has a wood floor taxes much cheaper no footings or poured floor . We excavated about 12 inches out from the floor. Made a grid of 4x8 squares with 4x6 ground contact timber filled each one with item 4 tamped 6 mill vapor barrier then 5/8th exterior plywood painted both sides with oil based paint. Been down for 29 years not a problem . Even have a 4 post lift setting on 3x3 steel plates in there.