why did twin towers collapse so easily i know plane hit them this is impossible?

Question

no plane has ever made a big building collapse so whats the answer

Answer 1

We can debate forever the physics involved and whether or not it was theoretically possible for airliners to cause the collapse of the twin towers.

There are, however, two questions that I would really like an answer to.

#1. Why was there molten steel at ground zero WEEKS after the collapse of the buildings? I'm not talking steel glowing red I'm talking about liquid metal dripping from the construction equipment that was doing the cleanup (this was a FULL MONTH after 9/11). Read the attached article (by the way, jet fuel doesn't burn hot enough to liquify steel):

http://www.infowars.net/articles/november2006/171106molten.htm

#2. Why did Larry Silverstein say that they "pulled" WTC #7 (not one of the twin towers - this was a 47-floor building located a block away)? This isn't a conspiracy, Silverstein said it in plain English. The building wasn't hit by a plane, it wasn't even badly damaged, yet it collapsed into dust in about 10 seconds. A year later Silverstein says he "pulled" the building to prevent further loss of life?

http://www.youtube.com/watch?v=C3E-26oVIIs&search="pull+it"+silverstein

I'm not looking for a political debate I just want to know the answers.

Answer 2

Normally aircraft that crash do not hit tall buildings, as a result it is not true to say no plane has ever made a big building collapse.
The aircraft that hit the twin towers started a chain of event's that resulted in the towers collapsing.
The planes were full of fuel and after crashing into the towers the fires that were started attacked the steel supporting structures. The heat caused the metal to loss its strength and sag, as soon as it did this there main floor supports collapsed inwards resulting in the start of the collaps.
The bastards that did this attack did not know that the buildings would collapse in this manner and were hopping that the impact from the planes would do the trick.
No building can ever be 100% safe from attack as there is so many variables that it is impossible to make allowances for.

Answer 3

Some things to think about:
A B-25 bomber flew into the Empire State building in WWII with avgas. No steel beams were weakened by the intense fire. All the black smoke in the towers fires shows a fire low on oxygen, not a blowtorch fire.
The Silverstein building was demod. It would have taken a week of prep work to do that.
In recounting my student flight training, a novice pilot could not have maneouvered the second plane like that at high speed while turning. And one of the videos on the second strike seems to show a laser spot on the building just infront of the plane which doesn't look like a B 767. Check all the YouTube 9/11's. The second plane in my opinion was a precision laser guided aircraft. Many witnesses mention seeing no windows on it. There was total foreknowledge of the attack on Pearl Harbor. Both of these were made to start wars.The Empire State Building Plane Crash involving avgas did not damage the steel.

B-25 Bomber Hits 78th Floor, July 28, 1945!!
Photo by Ernie Sisto/New York Times

Too late the pilot of the U.S. Army B-25 bomber with three men aboard, saw the Empire State Building loom up before his eyes. At 300 miles per hour, he plunged through the 34th Street side of the building wreaking havoc. The major portion of the wreckage penetrated the 78th floor. An engine hurtled down an elevator shaft igniting a furious fire in the basement. Parts of the motor and landing gear tore through the entire building landing on top of a 13-story ediface across the street and igniting a second conflagration.

With legs held down by two newsmen, photographer Ernie Sisto crawled out on a harrowing ledge and took the historic photo. It ran on page one of the New York Times.

Answer 4

The aircraft were still full of fuel which under those conditions became highly explosive. The structure wasn't designed to take those kind of stresses on those floors and there was still a fair bit of building above where the planes hit. The shock load just transmitted it's way down the framework and took out the rest of the building.

Were you looking for a conspiracy theory?

Answer 5

You say that it's impossible. OK, please post your engineering credentials for us to evaluate.

The reason that no plane has ever caused a building to collapse like that before is pretty simple, really. No building of that size and construction has ever been struck by a fully fueled airliner flying at cruise speed.

Tall buildings actually ARE designed to take a hit from an airliner and remain standing but the assumptions used in the engineering calculations are based upon a lightly fueled aircraft flying at approach speed. Most airliners fly final approach at 200 MPH or less and airlines only load enough fuel on board for the planned flight so the tanks are nearly empty as they arrive at their destination.

Conversely, ALL of the aircraft on 9/11 were fully fueled for cross-country flights from the East to West coasts. They were flown at full speed, over 550 MPH into their targets. The buildings were never designed to withstand that much violence and the fact that they came down was little surprise. If you actually HAD an engineering degree, you'd know that.

Look at it another way. You could hold a 1.5 inch firecracker in your hand and light it. It would hurt quite a bit when it went off, about like slamming a hammer into your hand, but wouldn't cause any serious damage. That's what the buildings are built for. The airliners on 9/11 were sticks of dynamite. Get the picture??

Answer 6

There are just to many factors to consider.

The towers WERE designed to withstand the strike of an aircraft, if for example an aircraft was to veer off-course unexpectedly.

They were not designed to withstand the impact of fully laden planes, full of jet fuel of the size and weight used. 30+ years ago, planes were smaller.

Part of the fireproofing that was originally applied to the steel skeleton was weak in some areas and, after the impact and subsequent explosions, it was blown off other areas.

The resulting fire softened the steel beams to the point where the elasticity went beyond it's safety margin and the steel ties holding the outer wall to the inner frame stretched and collapsed.

The weight of the building above the impact forced the walls to collapse outwards since the steel ties were no longer providing support by pulling the outside walls inwards.

As the outside walls collapsed and the floors above the impact began to collapse by 'pancaking', the resultant dynamic forces sealed the fate of the towers.

It is testament to the original engineers that they considered the impact of an aircraft over 30 years before the terrorist strike occurred. And the towers remained standing for long enough to evacuate many people.

Please say a prayer for those who lost their lives in this tragedy, the emergency services personnel who risked their own lives to save those who they could and the families and friends left behind as they face each day without their loved ones.

By the way, I missed the two planes crashing in to the South Tower as described by Terry G... I only saw one plane but I only saw one angle...

Answer 7

No plane that big has ever collided with a tall building before, those things were not designed with Osama bin Laden and his terrorist criminals in mind. At the time of World Trade Center construction, the largest planes were half as big.

Now, if you believe that this was not a terrorist action, if you think that the CIA or the FBI were involved, I think that there is a bridge in Brooklyn you might be interested, because you do tend to believe garbage conspiration theories.

Don't say the reality is impossible. It happened. That you do not understand just shows you are ignorant, not that it could not have happened

Answer 8

Part of the strength of the building was in the fact that it didn't have a huge support framework INSIDE...it used the skin of the building itself to support the structure. Worked great, but when the skin was ruptured, the support force had to go somewhere. In addition, the heat from all the unused Jet fuel exploding and combusting melted support beams, and the water from the sprinker system may have added to the weight, so the structure weakened until it could no longer support the upper floors, and they started pancaking. The designer built in the pancake destruction to prevent the building from tipping over and taking out others ( which is what Osama was hoping, but didn't happen ).
I wouldn't say it was done "easily", but any structure can be targeted at weak points ( except US nuclear plants? they're WAY overbuilt ), to cause destruction. Witness the Lusitania and the Titanic, both purported to be unsinkable. Well, yes and no. So, nothing's safe, in reality, if someone is determined enough to do the research to bring about "abnormal" destruction. I'm sure the twins would have survived fires, etc. should they have happened alone.

Answer 9

I think I heard that the heat from the fire caused the damaged structural steel to collapse,those buildings are not designed for planes that size to fly into them, a big bomb

Answer 10

The reason was not the impact. It was the full fuel tanks the planes had for cross country flight. The intense heat from the aviation grade fuel melted the steel supports for the building, resulting in collapse. Had the planes only been fueled for short flight, the towers would still be there.