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Old November 11th, 2007, 01:40 AM   #4061
ZZ-II
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thx sky, fantastic pics
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Old November 11th, 2007, 01:53 AM   #4062
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It seems like they are just waiting for those cranes to leave to put those windows glasses up to the top.
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Old November 11th, 2007, 02:02 AM   #4063
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A Few Answers and Questions

An interesting tidbit about tower crane construction/dismantling, that answers a few questions I had when I viewed the high-definition photographs posted by Skymyhusband but leaves some unanswered...

"To save space and to provide stability the vertical part of the crane is often braced onto the completed structure which is normally the concrete lift shaft in the center of the building... A tower crane is usually assembled by a telescopic crane of smaller lifting capacity but greater height and in the case of tower cranes that have risen while constructing very tall skyscrapers, a smaller crane (or derrick) will sometimes be lifted to the roof of the completed tower to dismantle the tower crane afterwards. A self-assembling tower crane lifts itself off the ground using jacks, allowing the next section of the tower to be inserted at ground level."*

*Provided by http://en.wikipedia.org/wiki/Construction_crane

If you examine the photograph of the incomplete cladding/steel work of the top of the Shanghai World Financial Center you can see the cranes are attached to a section of concrete, although the core concrete section appears to be located at the other side of the building...looking at earlier photographs of the progress of the SWFC shows the cranes attached to (as the article predicates) the structural core of the concrete. Does anyone have any photography/information about the disassembling and reassembling of the cranes, because everything I have seen thus far in skyscraper construction consists of the esoteric elevation of cranes: they seem attached to the top of the structure, but then we realize that the "top" is mutable...So are they reassembled every floor or so, or are they elevated using another crane...?...?
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Old November 11th, 2007, 03:39 AM   #4064
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by jerry yang

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Old November 11th, 2007, 09:58 AM   #4065
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Quote:
Originally Posted by Experts_Only View Post
An interesting tidbit about tower crane construction/dismantling, that answers a few questions I had when I viewed the high-definition photographs posted by Skymyhusband but leaves some unanswered...

"To save space and to provide stability the vertical part of the crane is often braced onto the completed structure which is normally the concrete lift shaft in the center of the building... A tower crane is usually assembled by a telescopic crane of smaller lifting capacity but greater height and in the case of tower cranes that have risen while constructing very tall skyscrapers, a smaller crane (or derrick) will sometimes be lifted to the roof of the completed tower to dismantle the tower crane afterwards. A self-assembling tower crane lifts itself off the ground using jacks, allowing the next section of the tower to be inserted at ground level."*

*Provided by http://en.wikipedia.org/wiki/Construction_crane

If you examine the photograph of the incomplete cladding/steel work of the top of the Shanghai World Financial Center you can see the cranes are attached to a section of concrete, although the core concrete section appears to be located at the other side of the building...looking at earlier photographs of the progress of the SWFC shows the cranes attached to (as the article predicates) the structural core of the concrete. Does anyone have any photography/information about the disassembling and reassembling of the cranes, because everything I have seen thus far in skyscraper construction consists of the esoteric elevation of cranes: they seem attached to the top of the structure, but then we realize that the "top" is mutable...So are they reassembled every floor or so, or are they elevated using another crane...?...?

To migrate from the core where they were attached and self rising during core construction, the cranes used each other for installing on the side in order to achieve the top steel construction. They were installed at a fixed elevation and did not rise during the hole construction.

When it will be finished, one of those cranes will help dismantling and puting down the second to the ground, and a third, smaller crane (derrick) will be lifted up, probably at level 96 (terrace at bottom of the hole) to put down the last big crane.

The last smaller crane will be then dismantled into small parts and lifted down with classical service elevators.

Anything esoteric?
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Old November 11th, 2007, 10:16 AM   #4066
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flickr, november 5th by cmmorel

image hosted on flickr


image hosted on flickr


image hosted on flickr
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Old November 11th, 2007, 11:03 AM   #4067
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ouch look at the traffic jam in the 2nd pic sky posted ..
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Old November 11th, 2007, 12:01 PM   #4068
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Lol, wide road have never solved any problem, if you want to reduce traffic, you dont widen the road but you narrow it instead!! To discourage people driving.
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Old November 11th, 2007, 12:06 PM   #4069
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Well, it's just a two-way road entering the tunnel... not so wide Just after 2x3way junction
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Old November 11th, 2007, 11:30 PM   #4070
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Thanks for the clarification Skymyhusband.
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Old November 12th, 2007, 02:46 AM   #4071
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Quote:
Originally Posted by Skymyhusband View Post
Well, it's just a two-way road entering the tunnel... not so wide Just after 2x3way junction
Skymyhusband I've been always wanting to ask you this. Is that you on your profile picture??
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Old November 12th, 2007, 06:02 AM   #4072
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Quote:
Originally Posted by Skymaster View Post
Skymyhusband I've been always wanting to ask you this. Is that you on your profile picture??
a respectable old man? hope skymyhusband give an answer.lol
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Old November 12th, 2007, 06:17 AM   #4073
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i think sky took the photo and photoshoped it :/

anyway fomr flickr

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Old November 12th, 2007, 07:26 AM   #4074
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wow!~~~~~~~~so great!~~
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Old November 12th, 2007, 07:36 AM   #4075
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Kix: one point
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Old November 12th, 2007, 08:15 AM   #4076
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aha, isnt that how you make vectors? lol

anyway new pics coming up by jerryyang





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Old November 12th, 2007, 08:46 AM   #4077
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Nice pics. Dismantling the inner scaffolding of upper level 100 skybridge
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Old November 12th, 2007, 09:03 AM   #4078
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skymyhusband, from the pics, do you think that they have built the lower skybridge yet?
you can see a little space around leve 99. would that be the scaffolding for the lower skybridge?

thanks
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Old November 12th, 2007, 09:07 AM   #4079
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It's not the lower skybridge, but the upper one. Lower SB is at level 97, bottom of the aperture.

Currently dismantling temporary bracing of level 100. Upper skybridge already built, imbricated with all that temporary bracing that get us confused



Amazing to see the cladding rising on south facade, it seems that there will be a lot of vents for the last refuge floor(s) (88-89-90)

Last edited by Skymyhusband; November 12th, 2007 at 09:27 AM.
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Old November 12th, 2007, 09:18 AM   #4080
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Also, you can see the scaffolding for pouring concrete of the lateral lift shafts rising on the right... I don't know how it's coming there.
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