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Skyscrapers

Skyscrapers. Construction Technology. What is the tallest skyscraper?. Burj Khalifa (Burj Dubai) Location: Dubai, United Arab Emirates Stories:160 Inhabitable + 46 Maintenance Overall Height: 2,717 ft Highest Point of Occupancy: 2,038 ft Began: 2004 Completed: January 2010

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Skyscrapers

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  1. Skyscrapers Construction Technology

  2. What is the tallest skyscraper? Burj Khalifa (Burj Dubai) Location: Dubai, United Arab Emirates Stories:160 Inhabitable + 46 Maintenance Overall Height: 2,717 ft Highest Point of Occupancy: 2,038 ft Began: 2004 Completed: January 2010 Elevators: 57 (40 MPH) Architect: Adrian Smith Cost: 1.5 Billion Over 2000ft. high!!

  3. Foundations Skyscrapers are very heavy, therefore we need to have a solid foundation. Why? How do we stop this from happening? Start on BEDROCK!

  4. Framing Skyscrapers are framed using steel columns and girders. The outer covering is called a curtain wall. Check it out!

  5. Spreading the weight SpreadFooting Even though the foundation has started on bedrock, we still need to spread the weight; just to be safe. How can we do this? Typically, they use SPREAD FOOTING.

  6. Wind Most skyscrapers sway in the wind. How can we minimize the distance of the sway? Engineers use TUNED-MASS DAMPERS. • A computer detects how far the wind is making the building move in one direction. • The computer will move a very heavy weight in the opposing direction. • Within under a minute, the sway is minimized to a safe level.

  7. Tuned-Mass Damper Notice the size compared to the guy!!

  8. Earthquakes Many skyscrapers are built in cities that have fault lines underneath. There have been many disasters due to earthquakes.

  9. How do we minimize damage? Skyscrapers are built a little more flexible. Flexibility allows the structure to twist and turn a little without breaking and/or crumbling. If the skyscrapers were rigid, pieces would snap off easily in an earthquake. What effects do you think this has on the overall design? We use damping systems! ALSO…

  10. Also… Glass is attached using rubber channels. This allows the glass to move a little bit. It has a lower change of breaking in an earthquake.

  11. For Extra Support What kind of cross-bracing should be used for this skyscraper? Cross-bracing is sometimes used. Most of the weight is transferred to the center supports. Most of the weight is transferred to the outer supports.

  12. First skyscraper Home Insurance Building Location: Chicago Height: 138 feet Stories: 12 1885-1931 Oldest Still Standing Milwaukee City Hall Location: Milwaukee Height: 353 Stories: 15 1895 - ? First and Oldest

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