@Aftermath I thought about the moisture issue and just framing out a base, that but I want this safe secured. I'm not concerned about anyone dragging this safe back up the stairs, but an unsecured safe can be tipped over and pushed onto its back in 60 seconds and then it's very vulnerable to a simple prying attack. (And of course I''ll be putting in motion sensors, a wifi camera, and a water sensor - all on battery backup). And roger on the dogs and the mean woman too
@hollowoutadime I would love to go taller like you're suggesting (12" was my first idea), but the safe moving company uses a hydraulic stair climber that can lift a maximum of 8" so I'm somewhat limited.
@redneckbmxer24 @ironpony52 good call on the carpet just being a sponge to hold moisture against the safe. You're right. I'm deleting that from my plan. It will just be the concrete pad plus a 1/4" sheet of solid HDPE on top as a moisture barrier.
@everyone - yes the room does have an 8" floor drain. I'm going to look into installing a sump pump as well, although that will be a future project. But the prior owner said he had never had water in the basement in the 33 years he lived here and I believe him, the carpets and drywall are all original and there isn't a single water stain anywhere.