Once they're prepped and dry, the wood crates can go on your supports. Measure and mark mounting points on the posts for the shelves, and drill pilot holes for the screws.

With lumber at Home Depot and Lowes running about $3.50 to $4 per 2-by-4 in 8-foot lengths, the wood frame, as seen in the video, will cost about $60 to $70 to build.