Essay Examples on Trinity Valley Community College

On September 11 2001 the worst attack on US soil happened

On September 11 2001 the worst attack on US soil happened two commercial planes flew into the World Trade Center At 8 47 a m the first plane hit the 93 99 stories of the North Tower then at 9 03 a m the second plane crashed into 75 85 stories of the WTC s south building Even though most Americans blamed Iraq I m pointing my finger at someone else the US government First off let's see how the towers were built From the Architects and engineers for 9 11 truth They had an inner tube and an outer tube which basically means the tower had a inner core and outer walls so the tubes carried the weight of the building The problem with the old skyscrapers was the grid of columns which took away floor space The trade center would be different all columns would be shifted to the core and the walls For basic structural components are the core the outer walls the hat truss and the floors First the core the core was made to support about 70 of the downward weight The inner core was designed to have 47 steel columns rising 110 floors high It housed the elevators and stairways too Second the outer walls were made to carry their own weight and about 30 of the downward force they formed 59 columns on each side with the 60th in the corner so 240 columns in total 



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