"
Arkan_Wolfshade We can see that the towers took somewhere between 115.4% to 175.8% free-fall time to complete collapsing. Personally, I do not consider 15.4%-75.8% margin of difference to qualify as being labeled "near"."
Then prove that other buildings have fallen WITHIN less than 15% of "near free fall speed". This percentage is acceptable to me, I live in a reality world where "near" has an acceptable variation and it is not an Absolute!
Though I have not timed other demolitions, perhaps this is something I will do. However, even with explosives I will bet that other implosions did not fall at the calculated values of a VACUUM!
" If you feel this is insufficient to explain the damage seen, please provide your maths showing why."
I don't dispute the outer structural damage and the internal damage stated by NIST.
"Let me put it another way. In the EPA's sample, drywall dust accounted for more than ~15% more of the outdoor sample than concrete; and account for more than ~46% more of the indoor sample.
The bulk of the cloud seen from the collapse of the towers is drywall dust not concrete dust."
Actually, that would be incorrect if you really look at it! Since the floors were CONCRETE, and the walls seperating the offices were Drywall, the ratio between the two would most likely be more CONCRETE since it is the supporting substance of the floor! Yes there would be drywall in the debris, but what was there more of drywall or concrete?
The floor can be seen here:
http://911research.wtc7.net/talks/towers/docs/site1099.jpg
So the ABSENSE of a large portion of this concrete being intact is problematic for the OT. There are rescue workers stating, that the largest part found is a 1" piece of a phone. That much concrete would be in large chunks piled up at the site. Does this look like a large pile of concrete????
http://i18.photobucket.com/albums/b108/janedoe444/trouble/20_cushman.jpg
Or maybe this:
http://i18.photobucket.com/albums/b108/janedoe444/trouble/19_flattened.jpg
Please show me where the massive concrete is for this building? Since the floors were concrete surely there would be signs of them laying around, right? Where are they?
Perhaps this statement, which I have not verified, but if true does show more evidence to implosion.
"“Loose Change, Final Cut” has a very informative, recorded
statement by a man who was trapped at floor 8 in WTC 7 due to
an explosion below him, he states for the record. Firefighters
were able to get him and a companion out of the building before
its complete collapse. Such an explosion would weaken the
structure below, as is commonly done in controlled demolitions."
http://www.journalof911studies.com/JonesAnswersQuestionsWorldTradeCenter.pdf
This has been one of my questions about the NIST report which everyone states has been answered:
"The NIST final report only takes us to the
point where the Tower is “poised to
collapse.” ...(NIST, 2005, p. 142; emphasis
added.)”"
This supports what I have been stating and so does the calculation provided in the document:
"Momentum Transfer Analysis of the Collapse
of the Upper Storeys of WTC 1
by Gordon Ross
• “The analysis shows that despite the
assumptions made in favour of collapse
continuation, vertical movement of the falling
section would be arrested prior to
completion of the 3% shortening phase of
the impacted columns…
• “A collapse driven only by gravity would
not continue to progress beyond that point.”"
"No “stacked-up” floors in either Tower (left).
And where did the core columns go?
(How to explain without explosives?)"
See pg 25 for picture of MISSING core!
"“The focus of the Investigation was on the sequence of
events from the instant of aircraft impact to the initiation
of collapse for each tower. For brevity in this report, this
sequence is referred to as the "probable collapse
sequence," although it does not actually include the
structural behavior of the tower after the conditions
for collapse initiation were reached...” (NIST, 2005, p.
80, fn. 12; emphasis added.)
• Again, on page 142, NIST admits that their computer
simulation only proceeds until the building is “poised for
collapse”, thus ignoring any data from that time on.
• “The results were a simulation of the structural
deterioration of each tower from the time of aircraft
impact to the time at which the building became
unstable, i.e., was poised for collapse. ...(NIST, 2005,
p. 142; emphasis added.)”"
"“World Trade Center disaster investigators [at NIST] are refusing to show
computer visualizations of the collapse of the Twin Towers despite calls
from leading structural and fire engineers, NCE has learned."
"Experiments: Models of WTC floor assemblies, subjected
to intense fires, did not melt and did not collapse!
• Quoting from the final NIST report:
• “NIST contracted with Underwriters Laboratories,
Inc. to conduct tests to obtain information on the fire
endurance of trusses like those in the WTC towers….
• “All four test specimens sustained the maximum
design load for approximately 2 hours without
collapsing…
• “The results established that this type of assembly
was capable of sustaining a large gravity load,
without collapsing, for a substantial period of time
relative to the duration of the fires in any given
location on September 11.” (NIST, 2005, p. 141;
emphasis added.)"