samedi 28 septembre 2013

Progressive collapse

Today, a building in Christchurch collapsed unexpectedly.

It was being demolished due to earthquake damage, and a demolition digger was ripping it pieces bit by bit when a part of the building collapsed and a chain reaction occurred leading to all of the floors collapsing.

No one was injured, although there were a few rather scared people!

a video can be seen here (the best one IMO because it shows the complete collapse)

News report

Another news report

one more video (kind of NSFW due to swearing)

It is a concrete structure rather than steel, and it was much smaller than the WTC buildings, but I think some comparisons can be made.

First off, it shows straight away that the dust clouds have nothing to do with a controlled demolition (the explosive kind), also, it was REALLY loud! (could easily be mistaken for explosions) Actually, it sounds remarkably similar to the WTC collapses.

A failure of one part of the structure lead to the whole structure collapsing, and the result was a rather flat pile of rubble.

Once the support columns were destroyed, those top floors fell pretty fast!



Thought some people might be interested.:)





via JREF Forum http://forums.randi.org/showthread.php?t=265949&goto=newpost

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