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And just to remind everyone,
the first eye witness & first responder
reports, were of Explosions.
Lots and lots and lots
of Explosions.
youtu.be...
THERE ARE OVER 2,000 MANHOLE FIRES/EXPLOSIONS EACH YEAR IN NYC. UNDERGROUND CABLES BECOME FRAYED FROM SNOW/ICE MELTING CHEMICALS, AGING, CORROSIVE CHEMICALS, OVERLOAD OR RATS BITING THEM
metroforensics.blogspot.com...
Booms Flashes and Squibs
would be much easier to see
and HEAR if it weren't for that
darn 1/4 mile high 3 mile wide
pyroclastic cloud .
Instantly turning 500,000 tons of building
to powder makes for incredible sound insulation.
Rapid onset of destruction,...
Constant acceleration at or near free-fall through what should have been the path of greatest resistance,
Numerous eyewitness accounts of explosions including 118 FDNY personnel,
Lateral ejection of multi-ton steel framing members distances of 600 feet at more than 60 mph,
Mid-air pulverization of 90,000 tons of concrete, and large volumes of expanding pyroclastic-like dust clouds,
...Isolated explosive ejections 20 to 60 stories below the “crush zone,”
Total destruction and dismemberment of all three buildings, with 220 floors each an acre in size missing from the Twin Towers’ debris pile, ...
Several tons of molten steel/iron found in the debris piles,
Nanothermite composites and iron microspheres found in WTC dust samples.
Evidence of thermite incendiaries on steel beams,
The One Meridian Plaza Fire
One Meridian Plaza is a 38-floor skyscraper in Philadelphia that suffered a severe fire on February 23, 1991. The fire started on the 22nd floor and raged for 18 hours, gutting eight floors and causing an estimated $100 million in direct property loss. It was later described by Philadelphia officials as "the most significant fire in this century".
The fire caused window breakage, cracking of granite, and failures of spandrel panel connections. Despite the severity and duration of the fire, as evidenced by the damage the building sustained, no part of the building collapsed.
The First Interstate Bank Building is a 62-story skyscraper in Los Angeles that suffered the worst high-rise fire in the city's history. From the late evening of May 4, 1988 through the early morning of the next day, 64 fire companies battled the blaze, which lasted for 3 1/2 hours. The fire caused extensive window breakage, which complicated firefighting efforts. Large flames jutted out of the building during the blaze. Firefighting efforts resulted in massive water damage to floors below the fire, and the fire gutted offices from the 12th to the 16th floor, and caused extensive smoke damage to floors above. The fire caused an estimated $200 million in direct property loss.
A report by Iklim Ltd. describes the structural damage from the fire:
In spite of the total burnout of four and a half floors, there was no damage to the main structural members and only minor damage to one secondary beam and a small number of floor pans.
edit on 15-10-2015 by Redlisted because: (no reason given)
Caracas Tower Fire
The tallest skyscraper in Caracas, Venezuela experienced a severe fire on October 17, 2004. The blaze began before midnight on the 34th floor, spread to more than 26 floors, and burned for more than 17 hours. Heat from the fires prevented firefighters from reaching the upper floors, and smoke injured 40 firefighters.
Lax enforcement of fire codes in Venezuela was blamed for the malfunctioning of water pumps and a lack of fire extinguishers inside of the building. Because the building was empty when the fire broke out, no civilians were killed or injured. [/img]
The most recent example of a spectacular skyscraper fire was the burning of the Hotel Mandarin Oriental starting on February 9, 2009. The nearly completed 520-foot-tall skyscraper in Beijing caught fire around 8:00 pm, was engulfed within 20 minutes, and burned for at least 3 hours until midnight. Despite the fact that the fire extended across all of the floors for a period of time and burned out of control for hours, no large portion of the structure collapsed.
It is tempting to draw parallels between this spectacle and the destruction of WTC 1, 2, and 7 because of the stark opposites: on 9/11/01, three skyscrapers were transformed into piles of rubble primarily as a consequence, supposedly, of fires -- fires spanning small fractions of each building; and on 2/09/09, a skyscraper remained intact after burning like a torch for hours. However such parallels may be limited by major structural differences between the buildings in the two cases -- one being that the Hotel Mandarin Oriental, designed by the famous Dutch architect Rem Koolhaas, had a full-height interior atrium, and thus had the hollowness that the 9-11 Commission deceptively attempted to attribute to the Twin Towers.
it defies the laws of physics. there is no way three of the sturdiest buildings would fall down just due to two measly aeroplane fires. other buildings have survived far worse.
Santa Monica Airport crash
A private jet veered off the runway and slammed into a hangar at Santa Monica Airport, sparking a fire that consumed the airplane and caused the hangar to collapse. There were no survivors.
www.latimes.com...
Kader Toy Factory Fire
At about 4pm on May 10th, 1993, a small fire was discovered on the first floor of part of the E-shaped building. Workers were instructed to keep working as the fire was thought to be minor. The fire alarm in this building did not sound.
The building was reinforced with un-insulated steel girders which quickly weakened and collapsed. This part of the building was dedicated to the storage of finished products and the fire spread quickly. Other parts of the factory were full of raw materials which also burnt very fast... Fire-fighters arrived at the factory at about 4:40pm, to find Building One about to collapse.
The Kader buildings,...collapsed relatively early in the fire because their structural steel supports lacked the fireproofing that would have allowed them to maintain their strength when exposed to high temperatures.
A post-fire review of the debris at the Kader site showed no indication that any of the steel members had been fireproofed.
en.wikipedia.org...
The building was designed to have a fully loaded 707 crash into it. That was the largest plane at the time. I believe that the building probably could sustain multiple impacts of jetliners because this structure is like the mosquito netting on your screen door -- this intense grid -- and the jet plane is just a pencil puncturing that screen netting. It really does nothing to the screen netting.
The buildings have been investigated and found to be safe in an assumed collision with a large jet airliner (Boeing 707—DC 8) traveling at 600 miles per hour. Analysis indicates that such collision would result in only local damage which could not cause collapse or substantial damage to the building and would not endanger the lives and safety of occupants not in the immediate area of impact.
Our analysis indicated the biggest problem would be the fact that all the fuel (from the airplane) would dump into the building. There would be a horrendous fire. A lot of people would be killed, ... The building structure would still be there
THE STRUCTURAL ANALYSIS CARRIED OUT BY THE FIRM OF WORTHINGTON, SKILLING, HELLE & JACKSON IS THE MOST COMPLETE AND DETAILED OF ANY EVER MADE FOR ANY BUILDING STRUCTURE. THE PRELIMINARY CALCULATIONS ALONE COVER 1,200 PAGES AND INVOLVE OVER 100 DETAILED DRAWINGS.
...
4. BECAUSE OF ITS CONFIGURATION, WHICH IS ESSENTIALLY THAT OF A STEEL BEAM 209' DEEP, THE TOWERS ARE ACTUALLY FAR LESS DARING STRUCTURALLY THAN A CONVENTIONAL BUILDING SUCH AS THE EMPIRE STATE BUILDING WHERE THE SPINE OR BRACED AREA OF THE BUILDING IS FAR SMALLER IN RELATION TO ITS HEIGHT.
...
5. THE BUILDING AS DESIGNED IS SIXTEEN TIMES STIFFER THAN A CONVENTIONAL STRUCTURE. THE DESIGN CONCEPT IS SO SOUND THAT THE STRUCTURAL ENGINEER HAS BEEN ABLE TO BE ULTRA-CONSERVATIVE IN HIS DESIGN WITHOUT ADVERSELY AFFECTING THE ECONOMICS OF THE STRUCTURE
analysis of the engineering/architecture firm that designed wtc 7 of it's sturdiness
The building was designed to have a fully loaded 707 crash into it. That was the largest plane at the time.
Civil & Structural Engineers on WTC Collapse
"The aircraft moved through the building as if it were a hot and fast lava flow," Sozen says. "Consequently, much of the fireproofing insulation was ripped off the structure. Even if all of the columns and girders had survived the impact - an unlikely event - the structure would fail as the result of a buckling of the columns. The heat from an ordinary office fire would suffice to soften and weaken the unprotected steel. Evaluation of the effects of the fire on the core column structure, with the insulation removed by the impact, showed that collapse would follow whatever the number of columns cut at the time of the impact."
There are 120,000 members of ASME(American Society of Mechanical Engineers) who do not question the NIST report. There are also 370,000 members of IEEE(Institute of Electrical and Electronics Engineers) who do not question the NIST report. There are also 40,000 members of AIChE(American Institute of Chemical Engineers) who do not question the NIST Report. There are also 35,000 members of AIAA (American Institute of Aeronautics and Astronautics) who do not question the NIST report.
Towers Weakened by Planes; Brought Down by Fire
Only a handful of architects and engineers question the NIST Report, but they have never come up with an alternative. Although at first blush it may seem impressive that these people don't believe the NIST Report, remember that there are123,000 members of ASCE(American Society of Civil Engineers) who do not question the NIST Report. There are also 80,000 members of AIA(American Institute of Architects) who do not question the NIST Report.
Why the World Trade Center Buildings Collapsed: A Fire Chief ’s Assessment
Bearing walls and Open floor design
When the jet liners crashed into the towers based upon knowledge of the tower construction and high-rise firefighting experience the following happened: First the plane broke through the tubular steel-bearing wall. This started the building failure. Next the exploding, disintegrating, 185-ton jet plane slid across an open office floor area and severed many of the steel interior columns in the center core area. Plane parts also crashed through the plasterboard-enclosed stairways, cutting off the exits from the upper floors.
The jet collapsed the ceilings and scraped most of the spray-on fire retarding asbestos from the steel trusses. The steel truss floor supports probably started to fail quickly from the flames and thecenter steel supporting columns severed by plane parts heated by the flames began to buckle, sag, warp and fail. Then the top part of the tower crashed down on the lower portion of the structure. This pancake collapse triggered the entire cascading collapse of the 110-story structure.
vincentdunn.com...
Did experts on the scene think WTC 7 was a controlled demolition?
Whom should we ask to find out if WTC 7’s collapse resembled an explosive demolition? How about asking the explosive demolition experts who were on the scene on 9/11? Brent Blanchard of Protec:
"Several demolition teams had reached Ground Zero by 3:00 pm on 9/11, and these individuals witnessed the collapse of WTC 7 from within a few hundred feet of the event. We have spoken with several who possess extensive experience in explosive demolition, and all reported seeing or hearing nothing to indicate an explosive detonation precipitating the collapse.
As one eyewitness told us, "We were all standing around helpless...we knew full well it was going to collapse. Everyone there knew. You gotta remember there was a lot of confusion and we didn't know if another plane was coming...but I never heard explosions like demo charges.
We knew with the damage to the building and how hot the fire was, that building was gonna go, so we just waited, and a little later it went."
WTC Pre-Collapse Bowing Debunks 9/11 "Controlled Demolition" Theory
Indications of the Imminent Collapse of the World Trade Center Buildings Disprove Explosives Theory
The World Trade Center's Steel Structure Was Buckling Before the Collapse
Police, Firemen and Civilians Saw Warning Signs of Collapse of the Twin Towers on September 11th 2001
The Structural Engineering Community Rejects the Controlled-Demolition Conspiracy Theory
The structural engineering community rejects the controlled-demolition conspiracy theory. Its consensus is that the collapse of the World Trade Center buildings was a fire-induced, gravity-driven collapse, an explanation that does not involve the use of explosives.
The American Society of Civil Engineers Structural Engineering Institute issued a statement calling for further discussion of NIST's recommendations, and Britain's Institution of Structural Engineers published a statement in May 2002 welcoming the FEMA report, noting
The structural engineering faculty at the university issued a statement which said that they "do not support the hypotheses of Professor Jones". On September 22, 2005, Jones gave a seminar on his hypotheses to a group of his colleagues from the Department of Physics and Astronomy at BYU. According to Jones, all but one of his colleagues agreed after the seminar that an investigation was in order and the lone dissenter came to agreement with Jones' suggestions the next day.
Thomas Eagar, a professor of materials science and engineering at the Massachusetts Institute of Technology, also dismissed the controlled-demolition conspiracy theory. Eagar remarked, "These people (in the 9/11 truth movement) use the 'reverse scientific method.' They determine what happened, throw out all the data that doesn't fit their conclusion, and then hail their findings as the only possible conclusion."
Civil & Structural Engineers on WTC Collapse
"The aircraft moved through the building as if it were a hot and fast lava flow," Sozen says. "Consequently, much of the fireproofing insulation was ripped off the structure. Even if all of the columns and girders had survived the impact - an unlikely event - the structure would fail as the result of a buckling of the columns. The heat from an ordinary office fire would suffice to soften and weaken the unprotected steel. Evaluation of the effects of the fire on the core column structure, with the insulation removed by the impact, showed that collapse would follow whatever the number of columns cut
Whom should we ask to find out if WTC 7’s collapse resembled an explosive demolition? How about asking the explosive demolition experts who were on the scene on 9/11? Brent Blanchard of Protec:
Confusing Evidence for Explosives with Evidence for Demolition
Blanchard makes repeated assertions that there is no evidence of explosives.....
... That is arguable, given the unexplained sulfidation of steel, multiple fingerprints of aluminothermics in Ground Zero samples, and multiple and abundant evidence of high blast pressures that are difficult to explain absent high explosives.
That is not evidence that thermite brought down the WTC buildings. Conspiracy theorist claimed this was evidence of thermite reaction.
That is easily proven by the fact that demo explosions were not heard as WTC 1, WTC 2, and WTC 7 collapsed,
nly to you, seems other people have something else to say, you were not there so you have no say in the matter