Construction
Process Although
the construction of the World Trade Center hadn't
begin until 1965, the construction of the World
Trade Center was under consideration since the
end of WWII. The 16 acre's complex project took
interest to the Port Authority in the late
1950's. The site was fixed on a super block west
side of Lower Manhattan bounded by 4 blocks. The
blocks were leveled, and a huge hole referred to
as a "bathtub" was dug in the space.
Architect Minoru Yamasaki was chosen for the
project along with other selected architects
chosen by Yamasaki, along with engineers. The
Port Authority saw the project to have 10 million
square feet of office space, this making Yamasaki
work and built many building configurations. As
Yamasaki built these building configurations he
came up with the concept of twin towers and three
low rise buildings. To maximize the area of the
plaza the towers were designed to be tall. The
towers were initially thought to rise to 80-90
stories high, but later on it was decided to
construct them as the world's tallest buildings.
The inside of the towers would include a rigid
"hollow tube" of closely spaced steel
columns with the floor extending to the central
core. The towers were very unique in engineer
design and its complex and advanced elevator
system. The twin towers were the first buildings
ever to be built without using masonry. As
for the elevator system consisted of "sky
lobbies" which passengers used on the 44th
and 78th floors, causing a decrease of shaft
ways. As construction began in 1966,the cost of
the project was estimated to be at $1.5 billion.
Pictures of the
Construction Process click here.
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Controversy
The Twin Towers
weren't always popular. As the project of the
World Trade Center was proposed, to revitalize
the seedy "radio row" which was
dominated by electronic stores. Then Chase
Manhattan Bank Chairman David Rockefeller,
founder of the development association, and his
brother, Nelson, New York governor, pushed hard
for the project, insisting it would benefit the
entire city. In 1962, the Port Authority of New
York and New Jersey began plans to build the
center. Minoru Yamasaki and Associates of
Michigan, and Emery Roth & Sons, P.C., were
hired as architects. Eventually, Yamasaki decided
on two huge towers. Critics charged that a modern
monolith would rob New York of character, ruin
the skyline, disrupt television reception, and
strain city services. Despite all the
controversy, in 1965 the project was approved and
construction began. Five streets were closed off
and 164 buildings demolished to create the
16-acre site. Construction required the
excavation of more than 1.2 million cubic yards
of earth which created 23.5 acres of land along
the Hudson River, now Battery City Park, a
complex of four 60-story skyscrapers and four
apartment buildings.
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Construction Facts
Building the
World Trade Center took 200,000 tons of steel,
425,000 cubic yards of concrete, 600,000 square
feet of glass, and 12,000 miles of electric
cables. During peak construction periods, 3,500
people worked at the site. A total of 10,000
people worked on the towers; 60 died during its
construction.
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New York's New
Landmark One
World Trade Center was ready for its first
tenants in late 1970, though the upper stories
were not completed until 1972; Two World Trade
Center was finished in 1973. The towers were
dedicated in 1973. They were the world's tallest
buildings for only a short time, since the Sears
Tower in Chicago was dedicated a month later.
However, the north tower sported a 360-foot
television mast that allowed it to technically
remain the world's tallest building. A hotel, a
shopping plaza, and three smaller buildings
nearby completed the complex. The twin towers
became the most popular postcard image in the
world. Some three dozen movies were made at the
towers, including the 1976 remake of King Kong.
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Visitors Some 50,000 people worked
in the buildings, while another 200,000 visited
or passed through each day. The top floor
observation deck had 26,000 visitors daily, who
could see for 45 miles on a clear day. From the
ground, the towers were visible for at least 20
miles. Each tower had 97 elevators for passengers
and six for freight. Express elevators zoomed
skyward at 27 feet per second, reaching the top
in 4.8 minutes. The towers consisted of more than
300 computer main frames that served the towers'
occupants.
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Public Attraction
Before their
collapse, 19 murders were committed and 17 babies
born in the towers. They also contained nine
chapels representing six different faiths. As the
towers became more famous, they attracted
daredevils. Three men parachuted from the top,
while one dozen mountain climbers scaled the
outside. In 1974 a Frenchman walked a tightrope
between the towers.
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1993 Bombing
In 1993,
terrorists drove a truck packed with 1,100 pounds
of explosives into the basement parking garage at
the World Trade Center. Despite the size of the
blast, only six people were killed and 1,000
injured. After that bombing, the number of
parking spaces in the basement garage was reduced
from 1,000 to 600.
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Buried Treasure
The basements of
the World Trade Center also contained vast vaults
used by the COMEX metals trading division of the
New York Mercantile Exchange. Some 3,800 gold
bars, weighing 12 tons and worth more than $100
million, lie buried under the mountains of rubble
left after the attack. Authorities say the gold
has never been safer.
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Plans In 1999, New York
businessman Larry Silverstein purchased the World
Trade Center's 99-year lease on the twin towers
for $3.2 billion from the Port Authority of New
York and New Jersey. Since the attack,
Silverstein has vowed to rebuild, suggesting that
four smaller towers is a possibility.
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9/11 Click here for information and a
timeline of the events that took place at the WTC
on 9/11.
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