moveing a tower crane

[cat320]

I was just in Vegas and they had several of them up and working.These are the cranes that sit atop of the building on a square base from the ground .My question is how to they get it up and then back down and dismounted? I have never seen this done ,reason being that they are up so high.

 

[Pop]

How Tower Cranes Work

 

[portcityrigging]

whirley birds

I was just in Vegas and they had several of them up and working.These are the cranes that sit atop of the building on a square base from the ground .My question is how to they get it up and then back down and dismounted? I have never seen this done ,reason being that they are up so high.

The towers are " jacked " up and down with jacking system. The base section is normally embedded in many yards of concrete. This is an anchor as well as a solid foundation for raising and lowering. Actaually, the crane ( top bridge , cab, etc. )is assembled a few feet off the ground then the raising begins with the system. Jack it up 10 feet ,add a section of tower. Jack and add. Reverse for coming down. It's a quick operation with an experienced crew .

:usa

 

[DirtHauler]

The towers are " jacked " up and down with jacking system. The base section is normally embedded in many yards of concrete. This is an anchor as well as a solid foundation for raising and lowering. Actaually, the crane ( top bridge , cab, etc. )is assembled a few feet off the ground then the raising begins with the system. Jack it up 10 feet ,add a section of tower. Jack and add. Reverse for coming down. It's a quick operation with an experienced crew .

:usa

Great video of a crane being jacked or "climbing"

http://www.youtube.com/watch?v=vx5Qt7_ECEE&feature=related

 

[06bowtie_guy]

Thanks for the awsome posts. Didn't know that.

 

[Bluwenis]

Most tower cranes can be put up with a large all-terrian crane, such as Grove's GMK7550, a 550 ton with 420 of boom, to free-standing height, usually 300ft or a little less. Any taller than that and they need to be supported by the structure it is building. Once the building catches up to the cranes height, than the crane jacks itself and adds twenty ft sections at a time. The reverse happens on the way down, although many times the finished structure gets in the way and creative ideas are needed. I've taken a tower down with another crane on top of the finished structure.

 

[Bluwenis]

What not to do while climbing a crane.


www.sitbonzo.com/crane

be patient, takes awhile to load

 

[tonka]

What not to do while climbing a crane.


www.sitbonzo.com/crane

be patient, takes awhile to load

to much weight on the counter, me thinks! (in my pirate voice)

 

[Bluwenis]

The turntable and jib were simply not bolted to the climbing unit. The section on the hook is used to perfectly balance the crane when the y jack it. You bolt and unbolt the crane after each section. When he went to boom up and bring the next section in it simply tipped over backwards cleanly. Look mo, no net.

 

[Colin Doy]

It just seems to me that no matter what goes on in the world today there is a man and camera just waiting to snap things that go wrong:beatsme

 

[Countryboy]

Welcome to Heavy Equipment Forums Bluwenis! :drinkup

 

[terryk4675]

Sorry guys, I know this thread was about tower cranes, but another of our drivers who does a lot of crane moves with me sent me this......