These are pictures of the World Trade Centers. Some may be graphic for young viewers. Thanks for taking time to look at my page, and I got all the pictures off the internet.
Fast Facts:
Each tower had 104 passenger elevators,
21,800 windows,
and roughly an acre of rentable space on each floor.
From the observation deck on Two World Trade Center it was possible to see 45 miles in every direction.
Each tower swayed approximately three feet from true center in strong wind storms.
If all the glass used in the construction of both towers were melted into a ribbon of glass, 20 inches wide, it would have run 65 miles long.
On Friday, February 26, 1993, a bomb exploded in the underground garage of One World Trade Center, creating a 22-foot-wide, five-story-deep crater. Six people were killed and more than 1,000 were injured. The towers were cleaned, repaired, and reopened in less than one month.
On Tuesday, September 11, 2001, a second terrorist attack destroyed both towers.
Vital Statistics:
Location: New York, New York, USA
Completion Date: 1972 (Tower One), 1973 (Tower Two); destroyed 2001
Cost: $400 million
Height: 1,368 feet (Tower One), 1,362 feet. (Tower Two)
Stories: 110
Misc:
Materials: Steel
Facing Materials: Aluminum, steel
Engineer(s): Skilling, Helle, Christiansen & Robertson
Constructed by the Port Authority of New York and New Jersey in the early 1970s, the World Trade Center towers were, for their time, the best known examples of tube buildings. Tube buildings are strengthened by closely spaced columns and beams in the outer walls. The closely spaced columns and beams in each tower formed a steel tube that, together with an internal core, withstood the tremendous wind loads that affect buildings this tall.
Aside from withstanding enormous wind loads, the World Trade Center towers were also constructed to withstand settlement loads. Because the towers were built on six acres of landfill, the foundation of each tower had to extend more than 70 feet below ground level to rest on solid bedrock.
The two towers were unable to survive the effects of a direct hit by two hijacked commercial jetliners during terrorist attacks on the morning of September 11, 2001. Although they were in fact designed to withstand being struck by an airplane, the resultant fires weakened the infrastructure of the building, collapsing the upper floors and creating too much load for the lower floors to bear. Shortly after the attack, both towers collapsed.
At the time of their completion in 1973, the World Trade Center towers were the two tallest buildings in the world. Two years later, the Sears Tower in Chicago seized the coveted title.