POPULAR MECHANICS: How To Turn Your Living Room Into A Fallout Shelter. “In the event of a nuclear attack, the best thing to do is to take shelter underground. But if you’re stuck aboveground, the next-best thing to do is to build a DIY ‘expedient shelter.’ We show you how.”
It’s the next step beyond duck and cover!
Meanwhile, if this interests you, you may want to check out Bill Quick’s disaster-prep discussion forum.
And here’s a list of disaster-survival gear.