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To: Orcastraiter who wrote (16017)9/19/2006 6:25:47 PM
From: David Howe  Read Replies (2) | Respond to of 20039
 
<<< NIST says the floors did not fail. >>>

I think you are reading the report wrong, reading too specific a piece of it, or defining "fail" incorrectly.

Whether fail means crumble, sag, or fall flat as a pancake, it doesn't matter, the joists pulled away from the core columns and started the collapse.



To: Orcastraiter who wrote (16017)9/19/2006 11:54:26 PM
From: TigerPaw  Respond to of 20039
 
NIST says the floors did not fail.
It's obvious the floors failed because they became a big pile of rubble.

What NIST concluded was that the few floors around the impact zone that were affected by fire did not fail. They sagged.

Once the collapse was underway then of course the floors below failed one by one as the increasing weight smashed into them.

TP


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