Is there any technical reason why lumber is always stored horizontally? to me it seems much more convenient and efficient for a home shop to store lumber vertically (as long as you can keep it off the ground). No need to create a shelving system tied in to the studs. Plus wall space in a garage shop is very valuable, why reserve it for lumber when your stock can fluctuate in quantity. I am setting up a new garage shop and have a small stash of lumber, just contemplating storage options.