The Willis Tower

 

 

                                      The Willis Tower                                                     

   The Willis Tower is a 110-story building with a sky deck (where you can see four states Illinois, Indiana, Wisconsin, and Michigan) and was the worlds tallest building until 1998. 

   This building took 2,000 workers to build, has approximately 16,000, and weighs 222,500 tons. It took three years to build. In total the project cost $175 million. This was almost the tallest building in the world, and all tall buildings sway. This building will sway up to four to five feet, which is a lot for an average building. That is more than the Empire State Building and that building sways 6 inches. 

   This entire building sold for $840 million dollars in 2004. This building was originally named the Sears Tower, but they renamed in 2009 it the Willis Tower after the Willis Group Holdings. It opened in 1973 and is 1,730 feet tall, including the antenna. 

                                                                       Fun Facts

1.  It was designed by architectural firm Skidmore, Owings & Merrill.
2. Eighth-tallest building in the world.
3. 1,354 feet to the Skydeck.
4. 104 elevators moving 1,200 feet per minute.
5. 25,000 miles of electrical cable.
6. 43,000 miles of telephone cable.
7. Approximately 25,000 daily visitors.
8. 76,000 tons of steel.