Essay: World Trade Center Disaster
The impact of the planes led to extensive damage to columns, which hold the building. This also led to displacement of the insulation coating which was responsible for guarding the steel floor trusses and steel columns from fire. The planes had only left the airport, which means that they had a lot of fuel in their tanks. After the impact fuel was spread on to other floors and as a result, fire started on those floors.
The resultant fire, were so furious such that they reached 1000 degrees Celsius in temperature. Because of these temperatures, the fireproofing was displaced and as a result, the floors started to sag in pulling the supporting columns to the inside. The supporting columns started to bow leading to the “failure of the south face of WTC 1 and the east face of WTC 2”. (National Institute of Standards and Technology (NIST) Federal Building and Fire Safety Investigation of the World Trade Center Disaster (2006) available online). This is what initiated the collapse of WTC. The happenings a few minutes prior to the collapse of WTC as accounted by New York Police Department aviation unit as well as the photographic and video footage support the above theory. According to NIST findings, the collapse of the WTC was not because of the “pancake theory” which suggested that successive collapse of walls from the top, hence heaping immense weight on the floors beneath leading to the overall collapse.