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Old August 22nd, 2006, 12:27 PM   #201
Rachmaninov
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Quote:
Originally Posted by CULWULLA
^it was progressing well until the core had to be reconfigured due to being reduced for upper floors. it should take off again soon. but burjD will eclipse it and may stay infront.
Burj Dubai is now same height as Chelsea Tower.should be 350m by years end or tallest n Dubai and not even half way up.
True that the core stopped going up for a while, but the columns are still rising (although at a slower pace). Looks to me that Burj Dubai will surpass SWFC soon, if the Chinese couldn't reconfigure the core shaft quickly enough. It's taken them 2 or 3 weeks already.
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Old August 22nd, 2006, 03:01 PM   #202
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OMG its already the 7th tallest building in dubai.
CULWULLA can you also do the same comparison but with worlds tallest building.
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Old August 22nd, 2006, 04:29 PM   #203
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CULWULLA, you forgot Rose Rotana in that list.
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Old August 22nd, 2006, 04:37 PM   #204
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^yeah i think its not topped yet so i left it out but it is over 250m so should be there.
#Currently in the world there are approx 107 skyscrapers over 250m+.
There are also 70 UC over 250m.
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Old August 22nd, 2006, 08:48 PM   #205
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how will this be in 50 years!?
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Old August 22nd, 2006, 09:52 PM   #206
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21 of the 70 are in Dubai.
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Old August 23rd, 2006, 01:17 AM   #207
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Quote:
Originally Posted by SpaceScraper
I certainly wish the best for the city.

Texas, an oil rich part of the United States, had huge inflows of cash during the late 70's and early 80's. Much of that money went into real estate development. The surplus depressed property prices severely. No one wants a repeat of that.
Yes, I remember when that happened. I think because many of the Projects being built in Dubai; are like nothing that has ever been built before. Dubai will be on the map in a very big way. And many people and businesses will be always drawn to here. In the same way that people and businesses are drawn to Vegas.
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Old August 23rd, 2006, 07:48 AM   #208
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Hey guys, I have a question which always confused me when I looked at skyscrappers being built.
Quote:
Originally Posted by Second To None
[IMG]
These 2 cranes on the top.. How did they get there? I mean.. if the tower is being built, and constantly rising (in height), how do these 2 cranes operate from the same floor? I'm assuming they move up a floor, each time the building rises, but how exactly does that happen? How do they build on the same floor they are operating on?
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Old August 23rd, 2006, 08:47 AM   #209
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They add sections to the crane everytime they need to move up a floor.
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Old August 23rd, 2006, 09:12 AM   #210
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Oh! wow!! very close-up shot, thanks.
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Old August 23rd, 2006, 09:39 AM   #211
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Quote:
Originally Posted by _BPS_
Hey guys, I have a question which always confused me when I looked at skyscrappers being built.

These 2 cranes on the top.. How did they get there? I mean.. if the tower is being built, and constantly rising (in height), how do these 2 cranes operate from the same floor? I'm assuming they move up a floor, each time the building rises, but how exactly does that happen? How do they build on the same floor they are operating on?
i hope this is more than wat u wanted to know ...

How Do They Grow?
Tower cranes arrive at the construction site on 10 to 12 tractor-trailer rigs. The crew uses a mobile crane to assemble the jib and the machinery section, and places these horizontal members on a 40-foot (12-m) mast that consists of two mast sections. The mobile crane then adds the counterweights.
The mast rises from this firm foundation. The mast is a large, triangulated lattice structure, typically 10 feet (3.2 meters) square. The triangulated structure gives the mast the strength to remain upright.
[IMG]



[/IMG] To rise to its maximum height, the crane grows itself one mast section at a time! The crew uses a top climber or climbing frame that fits between the slewing unit and the top of the mast. Here's the process:
1. The crew hangs a weight on the jib to balance the counterweight.
2. The crew detaches the slewing unit from the top of the mast. Large hydraulic rams in the top climber push the slewing unit up 20 feet (6 m).
3. The crane operator uses the crane to lift another 20-foot mast section into the gap opened by the climbing frame. Once bolted in place, the crane is 20 feet taller!
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Old August 23rd, 2006, 09:45 AM   #212
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Quote:
Originally Posted by _BPS_
Hey guys, I have a question which always confused me when I looked at skyscrappers being built.

These 2 cranes on the top.. How did they get there? I mean.. if the tower is being built, and constantly rising (in height), how do these 2 cranes operate from the same floor? I'm assuming they move up a floor, each time the building rises, but how exactly does that happen? How do they build on the same floor they are operating on?
sorry .. i dunno y the pix din cum .. they'll really make the explanations more clear... try this Link : http://science.howstuffworks.com/tower-crane4.htm... .. its got everything u want to know.
n btw there r 3 cranes on top of BD not 2 !!
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Old August 23rd, 2006, 11:36 AM   #213
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I had that pic taken from SWFC construction:

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Old August 23rd, 2006, 12:18 PM   #214
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That is an awesome picture. Cheers
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Old August 23rd, 2006, 12:25 PM   #215
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wow how'd u get that interior shot man?? undercover....haha
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Old August 23rd, 2006, 12:47 PM   #216
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I found that pic here or in SSP, I don't remember.
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Old August 23rd, 2006, 03:48 PM   #217
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BD looks really tall in the last update.
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Old August 23rd, 2006, 03:59 PM   #218
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Quote:
Originally Posted by Skymyhusband
I had that pic taken from SWFC construction:

Hey dude why dont you post this pic in SWFC thread where its suppose to be.
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Old August 23rd, 2006, 04:14 PM   #219
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He's only giving an illustration as to how cranes are rising @ Burj Dubai in tune with the core, as asked in post 209 - the pic of the inside of SWFC gives a good idea how it's done.
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Old August 23rd, 2006, 04:38 PM   #220
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23/08/2006

[IMG]http://i8.************/25f24d5.jpg[/IMG]
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