Appendix D - Axia College Material Appendix D Topic Outline...

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Axia College Material Appendix D Topic Outline and Thesis Statement Guide What is your thesis statement : Since the attack on the World Trade Centers on 9/11, there’s always been the question of what really happened and what caused the Twin towers to collapse although hard to distinguish fact and fallacy the question still remains. I. Towers Design Parameters A. Evidence on the design of steel framed structures was built to be able to withstand high power winds even large jetliners. 1. Structural engineers who designed the Twin Towers carried out studies in the mid-1960s to determine how the buildings would flare if hit by large jetliners. In all cases the studies concluded that the Towers would survive the impacts and fires caused by the jetliners. 2. Given that September 11th was not a windy day, and that there were not throngs of people in the upper floors, the critical load ratio was probably well over 10, meaning that more than nine-tenths of the columns at the same level would have to fail before the weight of the top could have overcome the support capacity of the remaining columns. B. The withstand point of steel structures 1. Steel structures like bridges and buildings are typically designed to withstand five times anticipated static loads and 3 times anticipated dynamic loads. 2. Evidence of how these studies came to conclusion, includes the interviews
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This note was uploaded on 11/28/2010 for the course COM 150 taught by Professor Johannahvanatta during the Spring '08 term at University of Phoenix.

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Appendix D - Axia College Material Appendix D Topic Outline...

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