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Reinforced concrete core with waffle slabs supported by internal RC columns and steel beams, with perimeter steel columns which were unprotected above the 17th Floor level at the time of the fire.
The Windsor Tower was completely gutted by the fire on 12 February 2005. A large portion of the floor slabs above the 17th Floor progressively collapsed during the fire when the unprotected steel perimeter columns on the upper levels buckled and collapsed (see Figure 1). It was believed that the massive transfer structure at the 17th Floor level resisted further collapse of the building.
23:00 Fire started at the 21st Floor
23:05 ~ 23:20 After receiving a fire signal, the security guards went to the 21st floor and attempting to fight the fire before giving up
23:21 Fire brigade was called
23:25 Fire brigade arrived
23:30 Fire brigade started to fight the fire (news report)
00:00 All floors above the 21st floor were in fire (news report)
00:30 Fire brigade retreated and adopted a defensive position, preventing fire spread to adjacent buildings
02:00 Fire spread below the 17th floor
02:15 Chunks of facade started falling off (news report)
03:30 Fire spread below 16th floor, crossing over the upper technical floor
04:00 Floors at upper level collapsed (news report)
05:30 Fire spread below the 12th floor (news report)
08:30 Fire spread below the 4th floor
13:30 Fire was under controlled
17:00 Fire brigade declared the put out of the fire (news report)
Originally posted by tezzajw
Originally posted by Wrabbit2000
How many other little things have EITHER side simply "left out" and failed to share.....leaving normal folks totally ignorant of some rather important aspects...like how this Penthouse went down a measurable time before anything else began to fall....
Normal folks who are interested should learn to verify facts for themselves or at least be willing to ask for assistance.
The falling Penthouse has been in the NIST report on WTC 7, since the report was released. There's a complete timeline for the collapse of WTC 7 in that report. The same time line also mentions the free fall acceleration that occured for 2.25 seconds.
Normal folks have a choice to remain ignorant and trust what they read on conspiracy forums, or to deny ignorance and research as much as they can. Probably easier for most normal folks to switch off the internet and turn on the TV or go watch some live sporting event in a gladitorial arena.
Originally posted by FSBlueApocalypse
Excellent video here on the science behind Building 7's collapse, complete with models and videos, particularly a video with an angle of Building 7 rarely shown.
Originally posted by PW229
I tell you what, when I see a bucket load of PhD's telling me this happened and a bucket load of politicians telling me the opposite happened I know who I'm going with.
Originally posted by FurvusRexCaeli
1. Some of these are "degreed only." For instance, they did a bachelor's degree then went on to a career like high school teacher or auto repair. AE911 is disingenuous when it calls these signers "engineering professionals."
2. Some of the signers who have engineering degrees have degrees in specialties not related to construction. I skimmed the list and saw a biomedical engineer, an electrical engineer, a paper engineer, and a software engineer. While I am sure these are brilliant people, they do not have any special insight into building collapses.
3. There are 1.6 million engineers in the United States and, if I remember correctly, 140,000 architects. (I pulled the BLS numbers in an earlier thread.*) If AE 911 Truth only allowed Americans to sign, their petition would represent less than 0.1% of the eligible signers. Since they allow signatures from other countries, their petition has been signed by far less than 0.1% of the eligible signers. The inclusion of non-engineers with engineering degrees among the signers inflates the pool of eligible signers, and reduces the fraction that signed, even more.
4. Some of the signers repeat debunked rumors and myths in their signing statements. We do not know if they would have signed, given correct information.
Originally posted by Nutter
"Degreed Only" still entails having a degree in either engineering or architecture. I.E. learned people.
Unless you feel they just give degrees out? If that is the case then it is obvious you've never earned one.
This is the biggest logical fallacy of them all. All engineers and architects have to take statics (physics of bodies that are not in motion), dynamics (physics of bodies that are in motion), and just plain physics (including electrical physics).
Another fallacy. Choosing not to make a choice is still making the choice not to choose. I.E. just because someone is not vocal does not automatically include them in the "yes" crowd.
Some of the "debunking" I've seen can use a little debunking.
Originally posted by patternfinder
as to the whodunnit , just listen to this guy....visit his website too, he has the most comprehensive list of blogs explaining who is behind almost everything that has ever been a bad situation in history......