Terrorists are salivating at the prospect.
Why don’t they build underground?................
I’d quibble a bit with the implied premise that changing elevators is such an absolute deal breaker. Speaking personally, I think I’d find it kind of a cool thing to do.
I just can’t quite imagine the conversation “Yeah - we could have built a building that was X meters but decided not to because it would have required passengers to change elevators.”
Your elevator is waiting...
Who is John Galt?
Reardon Steel
the world is not better off from mega cities
they always require more public subsidies and public subsidized services to keep them livible
they concentrate power - potlitical and financial
they benefit bankers and real estate interests more than anyone else
they are unnecessary more as time goes on as technology keeps making dispersal of people and work less of a difficulty in getting work done
so, do I care that some Persian Gulf hereditary autocrat ruler will now commission the next testament to architectual penis envy? NO.
Why don’t the engineers just use magnetic levitation for elevators?
http://www.toshiba-elevator.co.jp/elv/infoeng/technology/tec05.jsp
Then they said, “Come, let us build ourselves a city, with a tower that reaches to the heavens, so that we may make a name for ourselves; otherwise we will be scattered over the face of the whole earth.”
No thanks. They’re standing targets.
serious question: Why dont elevators have gears along the shaft, and an electric motor on the car itself? (no rope)
“He provides some rather staggering stats about steel rope versus its UltraRope. For example, at a building height of 500 meters and with an elevator large enough to hold two-dozen souls, the total mass in motion of a steel rope-hoisted lift system would be 29,000 kilograms. The same system equipped with UltraRope would total a mere 12,800 kilograms.
.... but if you extend that building height to 800 meters, the steel-rope weight would increase to 108,600 kilograms, while the UltraRope-based lift system would rise only to 13,900 kilograms.”
12,800 kg for 500 meters is 25.6 kg/m.
An additional 1,100 kg for 300 more meters?
Now it’s 3.67 kg/m.
Why is “UltraRope” so much lighter per length measure after the first 500 meters upwards?
What am I missing here?
If I’m getting this, they could build taller skyscrapers today if they were willing to have two elevators—one from the first floor to 500 meters, and the second from 500 meters to the top. But, that would be too uncool a design, so it isn’t done, and has to await an improved, ultralight, high-tensile elevator rope that can do bottom to top in a single run.
I’ve been to the top of the Burj Khalifa.Not really the top...the highest public observation deck (above which are private apartments).It wasn’t nearly as impressive as was the roof deck of the WTC or the observation deck at the ESB.All you see from the Burj is a few other modern buildings and then sand.Lots and lots of sand!
I’ve been on the 55th floor of an office building....in the second bank of elevators...(only 825 ft.)
(and Sydney Tower, which I believe is 1000 ft.)
I have no interest in being in an office 3000 feet up!
(or more)
Do you?
What city should we expect to see these in first? Very interesting.
Nothing new in having to change elevators, the empire state building requires you to change elevators in order to reach the top floor, and I imagine the sears tower is the same not just the buildings mentioned in this article.