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



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Old June 13th, 2013, 04:47 AM   #5481
SergioCrash
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i'm not the only peruvian who's looking for updates of this huge building
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Old June 13th, 2013, 05:51 AM   #5482
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Quote:
Originally Posted by CrazyDave View Post
I hope they have a stair race in this one every year like they do at the ESB. But I really don't think it will happen.
climbing 1km* vertically on stairs would definitely be interesting. it would be like climbing a mountain except you would be inside the whole way!

*the 'roof' may not be at 1km, but I'm pretty sure they would still have stairs right up to the top for the window cleaners.
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Old June 13th, 2013, 01:40 PM   #5483
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This skyscraper hopefully will have the fastest elevators worldwide! Hope to see updates soon, too...
You can almost count on that
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Old June 13th, 2013, 05:55 PM   #5484
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Thyssenkrupp is building an elevator test tube in Rottweil, Germany. They will possibly use those in KT. Who, if not the Germans?
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Old June 13th, 2013, 06:01 PM   #5485
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in that case, let's hope that it'll be used for the Kingdom Tower
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Old June 13th, 2013, 09:28 PM   #5486
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Regarding the lifts:
I would have thought using magnets would be the best way. No moving parts, and no maximum height due to the length of the cables (not so much of a problem with the new technology, but 1km+ of cable would be hell to deal with!)
It would probably be able to go faster as well.
You need ropes for the counterweights, and without counterweights your elevators would consume much more energy.

When you have a counterweight, you don't need to hoist up the full weight of the elevator car every time you go up, you just need to "tip the balance" enough for the elevator to move.

With a counterweightless design you might be able to recover some more energy on the way down than in a counterweighted elevator, but the efficiency and economics would not be good.
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Last edited by Hmmz; June 13th, 2013 at 09:30 PM. Reason: Clarification.
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Old June 13th, 2013, 09:45 PM   #5487
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Great first post. Yes, magnetic elevators concepts are around for quite some time, but I was always wondering what prevents their introduction to skyscrapers. You made it quite clear sir

Btw in the near future shanghai tower will have the fastest elevators made by mitsubishi. They will be going with the speed of 18 meters per second or 64.8km/h (burj khalifa's elevators speed is 42km/h).
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Old June 13th, 2013, 11:08 PM   #5488
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If the X-Seed 4000 was built I wonder how fast the elevators would have to go
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Old June 13th, 2013, 11:48 PM   #5489
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So fast they would be making TIE Fighter noises and bending timespace.
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Old June 14th, 2013, 01:14 AM   #5490
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Speaking of lifts and the cables pulling them .......... http://www.economist.com/news/scienc...72|34413135|UK
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Old June 14th, 2013, 10:14 AM   #5491
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Quote:
Originally Posted by Hmmz View Post
You need ropes for the counterweights, and without counterweights your elevators would consume much more energy.

When you have a counterweight, you don't need to hoist up the full weight of the elevator car every time you go up, you just need to "tip the balance" enough for the elevator to move.

With a counterweightless design you might be able to recover some more energy on the way down than in a counterweighted elevator, but the efficiency and economics would not be good.
true, didn't think about that. great first post BTW!

Hopefully in the near future, sustainable hydrogen fusion power is developed, then energy won't be so much of a problem.
I'm not sure, but I think space elevators wouldn't be able to use the moving cables due to the immense length (~36,000km), plus even if you make cables extremely light, they would still weigh a LOT over such long lengths! Also, because gravity changes as you go higher, a counterbalance wouldn't be as effective, although past the halfway point, the down elevator would be pulling the up elevator up (two elevators instead of an elevator and a counterbalance would make a lot of sense)
It will be interesting to see what the future brings.
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Old June 14th, 2013, 10:36 AM   #5492
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Amazing Project from Jeddah...

just say .... W O W.....!!
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Old June 14th, 2013, 10:52 AM   #5493
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Quote:
Originally Posted by MattTheTubaGuy View Post
true, didn't think about that. great first post BTW!

Hopefully in the near future, sustainable hydrogen fusion power is developed, then energy won't be so much of a problem.
I'm not sure, but I think space elevators wouldn't be able to use the moving cables due to the immense length (~36,000km), plus even if you make cables extremely light, they would still weigh a LOT over such long lengths! Also, because gravity changes as you go higher, a counterbalance wouldn't be as effective, although past the halfway point, the down elevator would be pulling the up elevator up (two elevators instead of an elevator and a counterbalance would make a lot of sense)
It will be interesting to see what the future brings.
All space elevators concepts uses climbers. The "rope" stays in place fixed to the ground, and robotic climbers climbs up and down on it. It's probably still more economic than magnetic elevator since there is a friction between climber and the rope, but less than a classic elevators because there is no counterweight.
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Old June 15th, 2013, 10:42 PM   #5494
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this pic make anybody optimistic and enthusiastic for this project
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Old June 15th, 2013, 10:47 PM   #5495
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All that is for construction site? wow, looks like some industrial area It indeed makes anybody optimistic
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Old June 15th, 2013, 11:02 PM   #5496
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This is concrete plant near the towers location. From there concrete is delivered for the foundation construction.

Would be nice to have more updates or at least some spoken reports but what can we do. It's Jeddah after all.
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Old June 16th, 2013, 01:14 AM   #5497
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anybody knows why there is delay for this project?..or they just scrap it and its not gonna be built?
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Old June 16th, 2013, 01:46 AM   #5498
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There is no delay. At least none that we know of.
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Old June 16th, 2013, 06:30 AM   #5499
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Spiderman will be afraid of heights for the firts time...
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Old June 16th, 2013, 11:13 AM   #5500
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Similar stuff:
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