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Megatalls Discussions of projects under construction at least 600m/2,000 ft tall.



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Old October 29th, 2009, 07:41 AM   #861
Avian001
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IF this tower actually rises to 1600 meters, it begins to push the practical heights of buildings!

First: Airplanes flying higher than 10,000 feet (just twice the height of the Jeddah Kingdom Tower) require pressurized cabins. And while that's not really necessary for human breathability - since you can stand on a mountain that high without oxygen masks - it will be a practical barrier to buildings that high.

It's mostly because people will likely be making multiple daily trips from the top to the base of the tower. Long term effects of multiple rapid pressure changes over a period of months or years have never been studied. It may not be a hazard but we don't know yet. It might be that the tops of buildings that high will have to be pressurized at great expense.

Second: A tower the height of Jeddah Kingdom might be built as a challenge to our technology. But if more than one or two of these size towers are built, companies will rapidly examine the bottom line. And I suspect that it will never be economically practical to build anything like it again, especially in cities where land is cheap.

The only economic justification for buildings that high is that land costs are also colossally high. And this just isn't the case in Dubai or Jeddah.
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Old October 29th, 2009, 08:47 AM   #862
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Lands are extremely expensive in Riyadh, Jeddah, Makkah and Dubai. Saudi Arabia needs to build more than 5 million housing units before 2020 to accommodate the high-growing population. It is estimated that the population of 28 million will reach 80 million by 2020. I know it sounds crazy, but it is true.
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Old October 31st, 2009, 12:04 AM   #863
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These Middle east rich people don't know where to spend their money. I hope they continue spending it on buildings and crazy (but not impossible) projects.
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Old October 31st, 2009, 05:48 AM   #864
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Quote:
Originally Posted by MarioGutiérrez View Post
These Middle east rich people don't know where to spend their money. I hope they continue spending it on buildings and crazy (but not impossible) projects.
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Old November 4th, 2009, 06:02 PM   #865
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could this be the one ?

Quote:
Originally Posted by jh1 View Post

Quote:
Originally Posted by Riyadh Sun View Post
SOM's new tower in mystery location
The tower integrates programmatic and building systems into a structure of proven technology which uses familiar structural concepts in a new way. The radial geometry of the plan and elongated conical form have a powerful singularity and represent a crystalline geometric order containing 290,000 m2 of primarily residential program area. This vertical community is supplemented by limited amounts of office, hotel, service apartment and ancillary amenity areas including retail, a school, prayer area, and post office.

The form is the result of an iterative series of analytical structural exercises to optimise the tower for strength and wind performance. A single tapering conical concrete wall spreads outwards towards the perimeter, which in turn supports cantilevered floors containing the program. Intermittent, multi-story high setbacks occur at amenity floors to facilitate wind disruption, which in combination with the tessellated shape, reduces vortex shedding.

The hollow core exploits the natural stack effect to benefit the project. Like traditional wind towers, the spire captures natural forces generated by temperature differentials between the interior and exterior, and between high and low. Depending on the outside temperatures, a positive stack effect (drawing air in for top exhaust), or reverse stack effect (top draw for low exhaust), or double stack effect (drawing air at the midpoint to exhaust at the top and bottom) would provide cooler air to naturally ventilate the building. In addition to the benefits of natural ventilation, air velocities produced by the stack effect would drive wind turbines to generate energy for the building.

Other sustainable design features include high level wind turbines and solar collection arrays at the uppermost 200m for energy generation, no dedicated air-conditioning of internal atria, water recovery and conservation, heat recovery, tempered transitional spaces, a building form that minimises solar exposure, high performance facades, and efficient exterior shading.











what do you think ?
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Old November 4th, 2009, 06:03 PM   #866
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http://www.worldarchitecturenews.com...pload_id=12653
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ويــلاه إن نـظَرت وإن هىَ أعرضَت...|... وقعُ السهـــام ونـــزعهن أليم

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Old November 4th, 2009, 06:09 PM   #867
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Yes... i think thats the tower .

I'm sure of it! Well 1001m is dramaticly lower than first visioned. So...
this tower will be beaten by the Nakheel Tower that will at least +1200m.
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Old November 4th, 2009, 06:16 PM   #868
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I'm not complaining about 1001 meters in a nice design. That sounds pretty tasty to me!
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Old November 4th, 2009, 06:40 PM   #869
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Yes it has some vary interesting concepts, but its laughable that they have said 1000+ and came out with 1001m And also the design is quite clever because its always easer to build tower that is almost empty inside but i like it anyway, standing inside that huge atrium would be insane... i hope that news is true and it will go in jeddah
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Old November 4th, 2009, 07:04 PM   #870
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That's insane
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Old November 4th, 2009, 07:05 PM   #871
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This is looking pretty incredible! SOM is just the company for such a building
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Old November 4th, 2009, 07:16 PM   #872
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I have to admit that I wasn't very interested in this building because from the outside it seemed rather uninspired, but now that I've gotten to learn more about the inside (thank you, JH1!), I'm a HUGE fan! Remarkable design!!
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Old November 4th, 2009, 08:11 PM   #873
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nice find
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Old November 4th, 2009, 08:43 PM   #874
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Quote:
Originally Posted by Buyckske Ruben View Post
Yes... i think thats the tower .

I'm sure of it! Well 1001m is dramaticly lower than first visioned. So...
this tower will be beaten by the Nakheel Tower that will at least +1200m.
I am not so sure. This one looks nothing like the one initially presented. Its similar as far as shape goes. Both are cone looking. But the base and interior structure is completely different. The likelihood is that this SOM project is an entirely different tower.

Oh and the location of Kingdom Tower is no mystery.



I guess it could be an updated version but I still think its a new tower.
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Old November 4th, 2009, 09:20 PM   #875
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I feel myself smaller and smaller every day.That building is damn huge!
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Old November 4th, 2009, 09:31 PM   #876
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A central core consisting of at least 17 elevators etc. and about 570 meters high, starting from 212,9 meters is resting on one floorplate without any support... That will be one hell of a structural problem!

Come on, build it!!
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Old November 4th, 2009, 09:54 PM   #877
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Good plan such a big atrium. Think about the CCTV tower in Beijing when fire broke out. It acts as an enormous shimney.
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Old November 5th, 2009, 12:38 AM   #878
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It looks great, but I'd rather wait to see the whole three designs they were talking about. The 1001m on the other hand is really funny
I like the light reflection technique shown here, it's very impressive.
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Old November 5th, 2009, 01:36 AM   #879
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1001 meters? Now THAT seems much more realistic than the 1600 + I've been hearing earlier. Its height difference relative to the Burj Dubai would be about the same height difference that the Burj Dubai is to the Shanghai Tower.
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Old November 6th, 2009, 01:49 AM   #880
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1,000 metres seemed really high, until I realised it is as high as this mountain (above the lake)!

(from travelblog.org)
which is here

the renders on the last page look interesting with the mirrors and large atrium. should be interesting if it gets built.
btw what does 'OTB' mean?
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