[nascarnation]

I did a (very rough) calculation.

A quick search indicates you could have a delta pressure of about 100 millibars due to the tornado. That’s about 1.5 pounds per square inch. (that’s an extreme assumption but possible).

If the door is 2 ft by 6 feet, that’s 1.5 x 24 x 72 = 2592 pounds force.

[kjam22]

wow...

[kjam22]

this is what a lot of people buy around here. Put them in the garage and bolt them down to the concrete. I wanna be underground myself.