Congrats guys, your garages and lift setups look awesome!

How thick is your concrete? I've heard a normal 2 post needs 4.5" of concrete thickness to be safe, and I'm not sure mine meets it.

My garage is barn shaped with a super tall roof but has a little room above it that limits the height. I don't know if I can rip the floor out of the upstairs room to gain roof height without the structure falling down, but I'd love to do that to put a full height 2 post in.