The Windsor Building was of a similar truss design to the twin towers, the fire started 11 storeys from the top of the building, and it burned at temperatures of 800ºC for more than 18 hours [AFP]. The core of the building did not fail. The fire in WTC 1 is reported to have burned at 800ºC and was located roughly 17 storeys from the top of the building meaning the inner core supported only 6 additional floors of weight above the fire zone in comparison to the Windsor Building. WTC 1 collapsed after only 85 minutes, reportedly through core failure. Don't you find this odd? Let's take a look at the cores of the buildings. Windsor Building Core: WTC 1 Core: It is obvious that the core of WTC 1 was far more robust than the Windsor Building's core - this is to be expected since the building was 110 storeys high. The core was designed to support the entire weight of the buildings several times over. Far more than a mere "service core", it comprised of 47 steel box columns tied together at each floor by steel plates, similar to the 52" deep spandrel plates that tied the perimeter columns together. The largest of these core columns were 18"x36", with steel walls 4" thick near the base and tapering in thickness toward the top, and was anchored directly to the bedrock. Okay, the core of WTC 1 was solid, but an airliner flew directly fly into it. Could this be the reason for the quick collapse? The aluminum wings and the planes' fuselage would have been almost instantly shredded into pieces the size of an adult's fist, said Tomasz Wierzbicki, director of the impact and crashworthiness laboratory at M.I.T. Engines and other heavy parts continued to the core, but by working out the amount of energy involved, Dr. Wierzbicki and a student, Liang Xue, determined that at most half the inner columns could have been broken or severely mangled. [New York Times] The above indicates that at least 50% of WTC 1's core was intact after Flight 11 hit the building, and the fact that the building remained standing proves the intact core columns could support the weight of floors above the impact level without problems. This leaves a quandary because we are told that the 800ºC temperatures which the Windsor Building's core columns withstood for 18 hours wrecked the intact core columns of WTC 1 in only 85 minutes. Okay, let's assume that some of WTC 1's remaining core columns of were damaged by the plane impact, maybe this could account for the quick collapse of the building. Well, this might be plausible if an 800ºC fire burned at the airliner impact level, but these temperatures did not exist inside WTC 1. When you add to the above the mysterious demise of the building's core you have to conclude that either a fundamental flaw existed in WTC 1's inner core construction, or a fundamental flaw exists in the official explanation of the building's collapse.