My Challenge is to drop the 1/10th top C of a structure A on the bottom part of A to crush it.
Vérinage is to destroy all the supports of a concrete structure at 2/3 height from bottom to allow the 1/3rd top to crush the 2/3rd bottom.
If the top 5 weak floors can destroy the 5 strong floors immediately below, then why shouldn't the top weak 10 (or more) floors be able to destroy the strong floors immediately below and just keep going?
Actually, only one floor at a time needs to be collected on the way down.
A floor is tons of concrete and only connected to the central column strong enough to support it's own weight (plus some margin). And held there on it's own, independent of the floor above and below. The building facade is just decoration. No structural support.
If you drop another floor onto it from 10 feet, it will fail.
I'm sorry mate but you and markjo are wrong according to NIST.
I'm sorry, but did you miss the question mark at the end of my post?
Questions are never wrong.
Or are they?
Interrupting a discussion with off topic questions is always bad. Topic is my Challenge about fuel required to go to the Moon. The answer is that no amount of fuel will get you there. See my posts after post #1.
Now we discuss how many horizontal floors are required to collapse a building by gravity from top down into dust. Answer is that buildings do not collapse due to the horizontal floors.
Buildings only collapse by gravity, when supporting, vertical columns fail. Of course a column may fail, if you heat it up by fire, but an intact column below, will not fail, if a column above fails. It is very easy to show scientifically - particularly when the columns are of steel. I have done it at my website. And another of my Challenges is to show me wrong. Noone has.