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Old January 17th, 2015, 11:52 PM   #10021
K.S.A
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?/1/2015

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Old January 17th, 2015, 11:53 PM   #10022
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i think they're installing 2nd red crane on the right side
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Old January 18th, 2015, 03:04 AM   #10023
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Gear lifts

Quote:
Originally Posted by Shaddorry View Post
Why did nobody ever thought of making elevators run on rails instead of cables. Something like this:

I'm sure you get my point Them cables are only more weight to the building.
They do have those, the lifts that go on the outside of the building for lifting men and material, are often gear driven. That way they just add another section to top as needed, with no cable worries.
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Old January 18th, 2015, 06:57 AM   #10024
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Now, luckily the 10,000th post is yours!

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Old January 18th, 2015, 04:17 PM   #10025
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Quote:
Originally Posted by delphi7x10 View Post
They do have those, the lifts that go on the outside of the building for lifting men and material, are often gear driven. That way they just add another section to top as needed, with no cable worries.
with no cable worries...

http://www.constructionweekonline.co...apse-kills-19/
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Old January 18th, 2015, 07:53 PM   #10026
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Quote:
Originally Posted by delphi7x10 View Post
They do have those, the lifts that go on the outside of the building for lifting men and material, are often gear driven. That way they just add another section to top as needed, with no cable worries.
There are at least 3 major reasons systems like this are not used for elevators. The first reason is that gear trains especially ones in open air wear quite rapidly over time. There are also relatively slow compared to cable systems that are presently used. They also are quite noisy what should be a major detriment! These are the 3 most obvious reasons but there are also many others.
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Old January 18th, 2015, 09:39 PM   #10027
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Why not using electromagnets instead ?

I know, I know... But maybe in the future, when energy is not a problem anymore... You know when they get Fusion going and all that...

Or maybe if you are just rich enough...?

Last edited by Pohtija; January 18th, 2015 at 10:11 PM.
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Old January 18th, 2015, 09:56 PM   #10028
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Oh yeah... And just as I thought, I'm not the first one to get this idea.




http://www.thenational.ae/business/i...-kingdom-tower
Quote:
As buildings stretch higher, elevator companies will have to explore more advanced ways to move people. That might mean using huge magnets to propel elevator cars, doing away with much of the bulky machinery that limits how high they can go today, according to Antony Wood, the executive director of the Chicago-based Council on Tall Buildings and Urban Habitat.

Last edited by Pohtija; January 18th, 2015 at 10:10 PM.
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Old January 18th, 2015, 10:11 PM   #10029
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Why not using electromagnets instead ?
In germany there's currently a 244m elevator test tower U/C where exact such elevators will be tested when completed in ~2 years.
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Old January 18th, 2015, 11:24 PM   #10030
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What exactly is the value added with your "new" elevator concepts? Pretty sure the only limit on the current technology is how fast people can comfortably ride. There's a certain speed where it becomes unpleasant.
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Old January 18th, 2015, 11:52 PM   #10031
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Quote:
Originally Posted by Pohtija View Post
Why not using electromagnets instead ?

I know, I know... But maybe in the future, when energy is not a problem anymore... You know when they get Fusion going and all that...

Or maybe if you are just rich enough...?
Like those in Total Recall?

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What exactly is the value added with your "new" elevator concepts? Pretty sure the only limit on the current technology is how fast people can comfortably ride. There's a certain speed where it becomes unpleasant.
There is a height limit. Cables can only be a certain length because on one point they're so long that they weigh more than their cargo. Also, yes, the speed limit.
In the tallest towers of today it is impossible to build an elevator from main floor to top.
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Old January 19th, 2015, 12:04 AM   #10032
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anyone knows who will be the facade contractor?
any mockup made yet?
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Old January 19th, 2015, 01:29 AM   #10033
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Quote:
Originally Posted by j-biz View Post
What exactly is the value added with your "new" elevator concepts? Pretty sure the only limit on the current technology is how fast people can comfortably ride. There's a certain speed where it becomes unpleasant.
With the current concept, you can only have one car per shaft, travelling in a shuttle service back and forth. Imagine if you could have several shafts with cars able to switch freely between them. Suddenly, each shaft gets a massively increased capacity.
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Old January 19th, 2015, 07:57 AM   #10034
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With the current concept, you can only have one car per shaft, travelling in a shuttle service back and forth. Imagine if you could have several shafts with cars able to switch freely between them. Suddenly, each shaft gets a massively increased capacity.
True, also these new elevators could move horizontal as well.
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Old January 19th, 2015, 12:55 PM   #10035
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^Not sure if you'd need an elevator to do that in a skyscraper, unless it is to switch between shafs. Floors aren't that wide, so you wouldn't need mechanised transport to move from one side of the building to another. I'd rather use airport-style conveyor belts if the need ever arose.

EDIT: Though in low, wide buildings like factories, I definitely see your point. Goods transport is also a lot easier in an elevator than on a conveyor belt.
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Old January 19th, 2015, 04:06 PM   #10036
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Quote:
Originally Posted by ZZ-II View Post
In germany there's currently a 244m elevator test tower U/C where exact such elevators will be tested when completed in ~2 years.
Which skyscraper is it ? Is there a thread for it ?
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Old January 19th, 2015, 04:10 PM   #10037
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Quote:
Originally Posted by Shaddorry View Post
Like those in Total Recall?
I'm not sure what kind (lifts ?) they were in that movie... But I meant the kind that are in the video link I posted on the previous page. That should give you a pretty good idea.
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Old January 19th, 2015, 04:22 PM   #10038
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He means lifts moving on vertical AND horizontal shafts
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Old January 19th, 2015, 04:28 PM   #10039
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Did you know that to get to the top of Kingdom Tower will require 5,512 "steps" !!!

source :
https://twitter.com/Jedd_Eco_Co
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Old January 19th, 2015, 04:39 PM   #10040
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jeez. you wouldn't feel your legs anymore would you?
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