I'm looking at a house where I believe the best place for a gun safe is the basement on the cement floor. Thought maybe I'd build a "gun room" with reloading equipment and cleaning/maintenance equipment, etc. Anyway, this basement is accessible by a standard door and strait wooden staircase. The staircase is open on the left side going down once you get below the level of the 1st floor. There is no garage connection or direct door to the outside. Modern house, built in the early-mid 90's ie. not an old rickety staircase. What is the maximum size/weight safe I or even a professional can fit down into such a basement? Thanks!