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echo: tech
to: MIKE ROSS
from: CHARLES ANGELICH
date: 2002-12-18 16:24:00
subject: Word Trade Center

12358d98b6ec
tech



Hello Mike - 

CA>> Fire is fire. Jet fuel is no more 'intense' than any other
CA>> fuel once it begins to burn. Try melting some steel with
CA>> jet fuel some day and expect to bring a lunch. 

MR> You don't have to melt the steel. Heating it above a certain
MR> threshold will make it start to lose a lot of its tensile
MR> and compression strength and it begins to sag (turns to
MR> butter). If the steel was pushing two things apart then it
MR> just folds like a piece of cheese between your fingers. 

I'm a 'founderyman'. 

MR> BTW the buildings falling straight down is a known failure
MR> mechanism called pan-cake or accordion mode. The weight of
MR> the upper floor falling  on the one below it causes it to
MR> fail instantly and the whole thing cascades floor after
MR> floor all the way to the ground. The building doesn't fall
MR> sideways because there is no instability in the lower
MR> floors. The impact shock only occurs on one floor at a
MR> time. Mike **** 

I'm not a demolitions expert but those on the TV documentaries
seem to be telling me it's not all that easy to drop a building?
Maybe someone should explain this 'theory' of pancaking to them?

>
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