How to get a crane down from a finished skyscraper?

When they build those big huge skyscrapers, you always see one or more of those huge cranes on the top of them during the building process. As the building goes up from 10 to 20 to 40, 50 or 60 floors, they keep moving the cranes so they are always on the very top. When they finally finish, how to they get the last crane down? I would image that for buildings that use 2 or 3 cranes, they use one of the cranes to lower the disassembled pieces of the other cranes, but what about the last crane? How do they get it down?

3 Responses to “How to get a crane down from a finished skyscraper?”

  1. billrussell42  on August 12th, 2012

    My guess is that they break it up into pieces, build a smaller crane and use that to lower the other pieces. The last pieces can go down in the elevator.

    Reply

  2. j d  on August 12th, 2012

    This great article will answer your questions:
    http://science.howstuffworks.com/transport/engines-equipment/tower-crane.htm

    Reply

  3. Firestormer  on August 12th, 2012

    They use the cranes to lower each other down like you said. The last crane will down nearly at ground level so they use a ground based crane to remove it.

    Reply


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