Big Dick McGee
If you don't know, now ya know
World chocolate shortage. Can't start until 2010.
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They're building Barad-dûr
- Thread starter Shitty Dual
- Start date
Dr Dave
pillzlol
I remember watching an episode of Modern Marvels about the construction of the Taipei tower, and If I recall they used some cranes that basicly crawled up the building or something. I would imagine they are useing similar construction techniques with the Burj tower that they did with Taipei.
Big Dick McGee
If you don't know, now ya know
^^Actually, that's the truth. Think of a set of train tracks that are vertical rather than horizontal. The crane does indeed crawl up the side of the structure as it's been built. The workers keep adding track as they go ever higher.
Big Dick McGee
If you don't know, now ya know
A stationary crane is another matter. It literally "grows" as the bulding grows. At the bottom is a stable foundation that's botled to a concrete base. There is a top section of the crane, where all the mechanicals are located called the "slewing unit". In between the slewing unit and the concrete base is the mast. The mast is made up of like 40-foot sections (I think they're that long). Anyway, just below the slewing unit is a climbing frame. Essentially, it's a fixed section of the mast with hydraulic lifters. It lifts a and supports a section of the mast, while another 40-foot section is fitted into place. This goes on and on until the crane is the desired height.
Oh, also important are the counterweights. Obviously, if the jib isn't properly balanced, the damn thing will tip over!
Oh, also important are the counterweights. Obviously, if the jib isn't properly balanced, the damn thing will tip over!
FBI parte due
Folces Weard
It'd be much cooler if they didn't stop at a third crane for lowering and just let them get smaller and smaller until a worker could stick the last one in his pocket and take it down with him.
Big Dick McGee
If you don't know, now ya know
^^LOL, that's a pretty accurate representation of a crane, though some have a jib (the long part with the crane cable and claw) that's centered over the mast, and the operator's cab can travel back and forth across the length of the jib.