Remember the “Happy Days” episode where Mr. Cunninham wanted to build a bomb shelter for his family? In the end, everyone wanted a “seat” in the shelter and there would not have been room for anyone.
Good thing the photographer had a flash on his camera or dad wouldn’t be able to read his newspaper.
My old house in the burbs came with a 1960s-era fallout shelter.
It has hammock hooks welded to wall for a whole family. It would get claustrophobic real fast; its maybe 11 by 13 by 7 feet tall.
Welded plate steel, with rivets in some places. It has a foyer, which is a clue that it’s for nuke rather than hurricane: some radioactivity is direct and cannot go around corners, so they put a corner near the entrance.