Picked these up from Home Depot. Made to hang from any 2x. They are called rafter hangers. If you have access to the rafters in your shop/building they would work great. I mounted a 2x to the wall spaced out with some osb and they work great. Best thing is they can be moved any time you want. Only cost $3 ea. Made out of 3/8 steel rubber coated at bottom. Supposed to be load rated at 50lb, but I think they would hold more than that.
