Besides, the guy who designed the WTC did make allowances for A plane hitting the buildings. I think it was an EMPTY 707 that he used? Not a cross-country fueled, FULL of people 737, going at an ANGLE: The structural engineers working on the World Trade Center considered the possibility that an aircraft could crash into the building. In July 1945, a B-25 bomber that was lost in the fog had crashed into the 79th floor of the Empire State Building. A year later, another airplane nearly crashed into the 40 Wall Street building, and there was another near-miss at the Empire State Building.[8] Leslie Robertson, one of the chief engineers working on the design of the World Trade Center, has since claimed to have personally considered the scenario of the impact of a jet airlinerâ??a Boeing 707â??which might be lost in the fog and flying at relatively low speeds, seeking to land at JFK Airport or Newark Airport. However, Robertson has provided no documentation for this assertion.
This also might have had something to do with the collapse: On September 11, 2001, hijackers associated with al-Qaeda took control of two early morning Los Angeles-bound flightsâ??both Boeing 767 jetlinersâ??soon after take off from Boston’s Logan International Airport. In its final moments, American Airlines Flight 11 flew south over Manhattan and crashed at roughly 440 miles per hour (710 km/h) into the northern facade of the World Trade Center’s North Tower at 8:46 a.m., impacting between the 93rd and 99th floors. Seventeen minutes later, United Airlines Flight 175 approached from the southwest, over New York Harbor, and crashed into the South Tower’s southern facade between the 77th and 85th floors at 540 miles per hour (870 km/h).[7] In addition to severing numerous load-bearing columns on the perimeter and inflicting other structural damage, the resulting explosions in each tower ignited 10,000 US gallons (38,000 L) of jet fuel along with office contents.[note 3][5] Jet fuel from the impact traveled down at least one elevator shaft and exploded on the 77th and 22nd floors of the North Tower, as well as on the west side lobby.
Also: After the planes hit the buildings, but before they collapsed, the cores of both towers consisted of three distinct sections. Above and below the impact floors, the cores consisted of what were essentially two rigid boxes; the steel in these sections was undamaged and had undergone no significant heating. The section between them, however, had sustained significant damage and, though they were not hot enough to melt it, the fires were weakening the structural steel. As a result, the core columns were slowly being crushed, sustaining plastic and creep deformation from the weight of higher floors. As the top section tried to move downward, however, the hat truss redistributed the load to the perimeter columns. Meanwhile, the perimeter columns and floors were also being weakened by the heat of the fires, and as the floors began to sag they pulled the exterior walls inwards. In the case of 2 WTC, this caused the eastern face to buckle, transferring its loads back to the failing core through the hat truss and initiating the collapse. In the case of 1 WTC, the south wall later buckled in the same way, and with similar consequences
And: In the immediate aftermath of the attacks, numerous structural engineers and experts spoke to the media, describing what they thought caused the towers to collapse. Hassan Astaneh, a structural engineering professor at the University of California at Berkeley, explained that the high temperatures in the fires weakened the steel beams and columns, causing them to become “soft and mushy”, and eventually they were unable to support the structure above. Astaneh also suggested that the fireproofing became dislodged during the initial aircraft impacts. He also explained that, once the initial structural failure occurred, progressive collapse of the entire structure was inevitable.[31] Cesar Pelli, who designed the Petronas Towers in Malaysia and the World Financial Center in New York, remarked, “no building is prepared for this kind of stress.”[32]
So, in conclusion: GO FUCK YOURSELF AND YOUR CONSPIRACY THEORIES!!!
I kid