Twin towers
TWIN TOWERS
Karl Reispass
Basic Facts
8 years to complete
· 10000 workers to construct
· Buildins weighed 200.000 tons
· 43.600 windows
· 12000 miles of electric cables
· Designed knowing that a plain could hit the building
· Very strong building
· The buildings were of steel construction
Basic facts
· 1993 terrorist act
· 2001 terrorist act
· Collapsed at free falling speed
· heat, which is high enough to weaken the steel
Burning Towers
Obvious cause of an explosion
Obvious cause of an explosion
Legit.jpg
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