I was at H and H this weekend and picked out a safe. I'm going to get the Liberty Lincoln 50. My only concern is not having a slab floor. Wondering if I needed to support the joists, I called liberty. They said that it isn't needed until we get into the presidential series. The safe I am getting weighs 1115 pounds and will be placed next to an exterior wall. I was thinking of concrete blocks and connecting joists in the crawl space, but they said it won't be needed. What say you guys?