"Wake Up!" wrote in message
...
"Keith W" wrote in
:

As a qualified engineer who works in the field of failure analysis
and prediction I suspect I am far more knowledgeable and
qualified in this field than either you or Professor Jones and I
have read the investigation reports and failure analyses.

The towers collapsed due to the failure of the struts linking
the damaged inner and outer cores. The outer shell failed in buckling
with a resultant progressive collapse , the floors above
the point of failure acting as a gigantic hammer overloading
each floor in turn

http://www.civil.usyd.edu.au/latest/aibs_2002_wtc.pdf

The weakness of struts in a fire is well understood by firemen,
those I have spoken to have a saying 'never trust a truss'

As lightweight steel structures they heat up fast and fail
relatively quickly compared with heavier steel joists.

Keith



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Keith, you're a qualified engineer. Please give your professional opinion
on these excerpts from Jones' paper (be sure to watch the video links
too):



I did so some days ago - clearly you werent listening

If you want a professional analysis it will cost $1500 per
day plus expenses, minimum charge period is one day.

Keith