Maybe I am not informed about it. Can you educate me plz.
AS far as 9/11 troofer dying a slow death is concerned then its similar to Pakistan accepting their role in 26/11. We all know if a country decides not to accept some unexpected revelations, no matter what they never will. They will do all possible stunts to defeat the opposition. Same is the case with USA.
thats what i am saying. Some 50 odd floor building cannot collapse with such incidence. Not please dont say USA had such sheet technology where buildings collapse due to fire.
Nowhere in the world you have seen this. thousands of highrises had caught fire in past too.
Please do not make this kind of statement. Make you look foolish.
Fire Protection Engineering Archives - Historical Survey of Multistory Building Collapses Due to Fire
A fire-initiated full collapse of a textile factory occurred in Alexandria, Egypt, on July 19, 2000. This 6-story building was built of reinforced concrete, and its fire started at about 9 a.m. in the storage room at the ground floor. Fire extinguishers were nonfunctional, and the fire spread quickly before the firefighters could arrive. An electrical short-circuit accelerated the fire spread. At about 6 p.m., nine hours after the start of the fire, when the blaze seemingly was under control and subsiding, the building suddenly collapsed, killing 27 people.
The highlighted is significant.
Concrete and steel have different behaviors when under physical stress and heat. Some may call these differences as 'superior' or 'inferior', but that is for a completely different discussion.
interFIRE, A site dedicated to improving fire investigation worldwide.
Spalling is caused by heating, mechanical pressure, or both.
...cause the concrete to crumble.
Basically, when a concrete structure like a load bearing column, which is already under compression stress, is under constant exposure/contact to flames, the concrete itself begins to literally explode in bits and pieces. Long enough of exposure/contact and the column will collapse, like what happened to that textile building in Egypt which is only
6 STORIES TALL and no aircraft crashed into it.
Concrete if often favored over steel in construction because of this behavior in fire. A bare steel column will soften (not melt) and when under constant compression pressure, the steel column will buckle/collapse sooner than its concrete counterpart. Steel is favored over concrete for resources reasons, meaning it takes less steel than concrete for the same load bearing requirement, but it will require additional fire protection armor.
For example...
Structural Steel Fire Protection | Pipe Fire Protection
...fire protection product for structural steel beams, columns, and walls in commerical, industrial plant, and offshore platform construction that has been tested and approved to protect in both cellulosic and hydrocarbon fire conditions.
So if a 6-stories
CONCRETE building -- which
DID NOT suffer any structural damages prior to the fire -- can collapse due to fire, what make you think a much taller steel framed building which was under falling debris bombardment and was suffering serious structural damages, then suffer an unchallenged fire, will remain standing?
The 'no airplane crashed into WTC 7' argument is a stupid and ignorant one.
Think about this logically. Why is it that Leslie Robertson, the lead structural engineer of the original towers...
Leslie E. Robertson - Wikipedia, the free encyclopedia
Leslie Earl Robertson (born February 12, 1928) was one of the structural engineers of the World Trade Center in New York, which was destroyed in the September 11, 2001 attacks and was responsible for the design of the buildings' sway-reduction features. He has since been structural engineer on numerous other projects, including the Shanghai World Financial Center and the Bank of China Tower in Hong Kong.
...
DID NOT join the ranks of the 9/11 Troofer movement? You think such a figure would lend this group enormous credibility? And yet, the lead structural engineers of the world's tallest structures, such as the muslims' Petronas Towers that are taller and more modern than the WTC towers, have stayed away from this movement. Are they all 'in it'? Were they and their families intimidated and paid off into silence?
The muslim countries are wealthy enough. Surely they can afford to construct at least one WTC type building and crash a robotic airliner into it. Why not? We are talking removing a major religion (Islam) from probably the most spectacular terror attack to date and insert another major religion (Judaism) in its place. Probably Christianity along as well.