2009 I started on a 16x20 storage shed in my yard that I finished last summer. Winter 2009/2010 it was all framed with a roof, just no doors put in or siding and nothing done to the inside. The shed sits on a compacted gravel pad (several hours with a plate compactor) that was leveled. I put down 4 4x6s that span the 20ft length and then built a 2x8 O.C. floor on that. I don't have any photos of it right now, but here is a photo of the pad: I was clearing snow today and it looked like the shed was leaning a bit to one side. Grabbed a level out of curiousity and it's sitting about 2" low on the left side in the photo. I'm hoping it's just the frost that shifted it, but I'm not sure why it would do it now and I have no movement at all before?? I'm not "too" worried about it as long as it will go back to level once everything thaws... is that usually the case? I know the heaves that get in the roads smooth out at least.