I have quite a lot of rough-sawn lumber that is at least 15 years old (ranging from 2x2' to 2x10') which has previously been stacked outdoors under a tarp during these years. Now I'm considering moving the lumber into the woodshed, which is an unheated space. The most space-saving method would be to store them vertically (sorted into compartments, see image example) since the ceiling height is really good. But if that is completely unacceptable, then I guess I'll have to build a sturdy shelf, but that takes up floor space...
What would you have done?