Too many people are talking like this from all sides... mind if I stop by if/when this pops off? I'll need some hardware.
I have a subterranean gun locker now. I was renting high security storage but decided to build it out. It's in the old house and adjacent to the master bdrm. It's dry and would take days to violate due to all of the rebar being grade 75. I don't recall the grade of the concrete but it's immensely strong. The rebar took almost a year to source.
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