One World Trade Center
Structure in General
- Windows of the World Restaurant (the world's highest) occupied the 107th floor.
- World's tallest building from 1972 - 1974; surpassed by the Willis Tower in Chicago.
- The building was destroyed in the terrorist attacks of September 11th 2001, when a Boeing 767 was flown into the building at the 85th floor at roughly 9:00 am. The building collapsed at 10:28 am.
- Faced with the difficulties of building to unprecedented heights, the engineers employed an innovative structural model: a rigid "hollow tube" of closely spaced steel columns with floor trusses extending across to a central core.
- The columns, finished with a silver-colored aluminum alloy, were 18 3/4" wide and set only 22" apart, making the towers appear from afar to have no windows at all.
- Also unique to the engineering design were its core and elevator system.
- Worried that the intense air pressure created by the buildings' high speed elevators might buckle conventional shafts, engineers designed a solution using a drywall system fixed to the reinforced steel core.
- The twin towers were the first super-tall buildings designed without any masonry.
- One World Trade Center was ready for its first tenants in late 1970, though the upper stories were not completed until 1972.
- On 7th August 1974, French high wire artist Philippe Petit made an illegal tightrope walk back and forth between One and Two World Trade Center towers that lasted almost an hour.
- Replaced the Empire State Building as the city's and the world's tallest building.
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Also recorded for this building:
structural engineering, demolition company, lightning protection, concrete supplier, electrical engineering, roofing supplier, lighting consultant, mechanical engineering, fire protection engineering, wind surveyor, facade supplier, developer, elevator supplier
Features & Amenities
- One of the city's famous buildings