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Old September 13th, 2011, 10:16 AM   #26461
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New Antenna, per latest info. 1787' building +8' lightning rod.






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Old September 13th, 2011, 11:39 AM   #26462
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Cool!
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Old September 13th, 2011, 11:39 AM   #26463
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FastCompany

Quote:
What 9/11 Taught Us About Designing Skyscrapers
By: Linda TischlerAugust 8, 2011

A new, safer model of skyscraper rises from the site of the attack.



The offices here at Fast Company enjoy a most remarkable view. From our aerie on the 29th floor of 7 World Trade Center, we look out over the New York harbor, Ellis Island, the Statue of Liberty, and the occasional jetliner floating down the Hudson. More breathtaking yet is the view directly below our windows: that 16-acre construction site known as Ground Zero.

When we moved to Lower Manhattan in April of 2007, the view was more dispiriting than inspiring. A muddy pit was shored up by concrete walls; every once in a while, a lone train from New Jersey snaked through a partially visible tunnel in the center. Without the World Trade Center's office workers, the area had become a commercial wasteland, apart from tourist attractions like Century 21 and J&R Electronics. The city had to offer incentives for urban pioneers.

The turnaround started shortly after 9/11, when developer Larry Silverstein called the architects at Skidmore, Owings & Merrill (SOM) and insisted that he wanted to rebuild on the site. "At the time, the press was saying high-rises were the product of a bygone era," says Nicholas Holt, SOM's director of technical architecture. "Even Larry was asking, 'If I build this, will anybody be willing to rent?' " The site, after all, was still a smoking pit.

SOM, which for 75 years has been the go-to architectural firm for companies wanting cutting-edge thinking in skyscraper innovation, knew the future of high-rises rested on one thing: making people feel safe working in tall towers. The first building to be erected adjacent to ground zero would be ours, 7 World Trade. Everyone involved knew it would become a test case for addressing the design failings of the ill-fated towers and forging a model for how skyscrapers should be built in the future.

One of the mysteries that SOM had to address was why the towers collapsed in the first place. Holt, whose office was just blocks away from the World Trade Center, remembers looking out his window and thinking that the buildings' sprinklers would eventually kick in. "I never imagined they would fall," he says. "I had made it north to Chinatown when somebody stepped out of a bodega and said, 'They're both gone.' "

As we now know, the impact of the planes alone was not enough to cause the towers' collapse. The combination of the impacts and the fires in their aftermath were what proved fatal. Not only had the planes knocked out parts of the buildings' structural frames, they also severed and disabled the sprinkler systems' supply pipes. As the fires continued, the remaining structure weakened to the point where the failure of one critical structural element begat the failure of the next--what architects call "progressive collapse."

Now, Holt says, top-tier buildings like ours have been redesigned to prevent that kind of collapse. These skyscrapers have steel connections capable of redirecting the path of the upper floors' load downward through other structural members if one should fail. And sprinkler supply lines have been located within an impact-resistant core--a major difference from the Twin Towers. Both innovations are now part of New York City building codes. In addition, the newest SOM buildings have two interconnected standpipes, so that if one should fail, the other can compensate.

Another issue the Twin Towers' disaster exposed was the difficulty of evacuating lots of people from very high floors. "The survival rate below the planes' impact was very high," Holt says. "Above it was very low. That was entirely linked to the damage to the core; the inability to navigate the stairs; and the heat, flames, and smoke not being mitigated by a sprinkler system." Designers knew that if tenants were going to be attracted to the upper reaches of these buildings, they needed to feel that they could get out safely. Now, the best American high-rise designs borrow from existing international thinking on safety. In addition to designing wider staircases and building separate stairs for firefighters (a strategy borrowed from the British, who have long practiced this), SOM is pioneering an elevator-assisted exit system that would help people on the highest floors get out faster.

Currently proposed for a 108-story tower in South Korea, the system reduces evacuation time by more than 20%. The Burj Kalifa, the 168-floor tower in Dubai that currently holds the record as the world's tallest building, uses a similar system. The idea is that a building's occupants can take the stairs to designated protected refuge areas on specific floors, at which point they can take elevators--called "lifeboats"--down to exits on the ground floor. The approach directly contradicts the conventional wisdom that you should never take an elevator in a burning building because its electronics could be compromised by the water used to fight the fire. The World Trade Center made clear that this approach needed modification, so some new skyscrapers, including 1 World Trade Center (originally known as the Freedom Tower), will allow for elevator use per instructions from a fire safety director or emergency responder.

Today, 1 World Trade is rising opposite the southwest corner of our building. The SOM-designed 102-story skyscraper, whose spire will reach 1,776 feet into the sky, will open in the first quarter of 2014. In a sign of how far we've come since the bleak days following the attack, the developer recently signed a 25-year, $2 billion lease with Conde Nast, the publisher of Vogue, The New Yorker, and Vanity Fair, for 1 million square feet of space, to house more than 3,000 employees. It's a move that speaks to both New Yorkers' resiliency and America's traditional optimism.

[...]

read more: http://www.fastcompany.com/magazine/...r-construction
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Old September 13th, 2011, 01:51 PM   #26464
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interesting stuff. At least, new buildings are a lot safer since 9/11
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Old September 13th, 2011, 02:04 PM   #26465
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awesome pics on this page nice work everyone!
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Old September 13th, 2011, 03:16 PM   #26466
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image hosted on flickr
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Old September 13th, 2011, 03:28 PM   #26467
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WAUW!
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Old September 13th, 2011, 03:49 PM   #26468
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wow very beautiful oasis-bangkok, thanks! The memorial has become very impressive and beautifull in combination with the towers they're building right now. Really a well designed monument with the water.
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Old September 13th, 2011, 05:14 PM   #26469
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OH MY GAUUUDDD...that picture is simply mindboggling and so beautiful ... and the Antenna's design is so symetric and dazzlingly astonishingly beautiful.

and the antenna's design from above, looks like the stars one can behold inside the doms of mosques around the world, with the same pattern, or with that lightfall and reflections, kind of like Jin and Jang, two hands holding eachother etc etc.

It is simply beautiful. ... Wish there was some sort of an observation platform on top of the Antenna to behold the beautiful city of NYC.
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Old September 13th, 2011, 05:37 PM   #26470
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Oasis, when you post an image from flickr, you really should credit the photographer and/or give a link back to the image. You used some of my images earlier on this thread and I pm'ed you about it and I just let it slide.
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Old September 13th, 2011, 07:35 PM   #26471
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Quote:
Originally Posted by Oasis-Bangkok View Post
image hosted on flickr

Love this photo!

Thanks for sharing.
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Old September 13th, 2011, 07:36 PM   #26472
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Quote:
Originally Posted by beanhead4529 View Post
Oasis, when you post an image from flickr, you really should credit the photographer and/or give a link back to the image. You used some of my images earlier on this thread and I pm'ed you about it and I just let it slide.
He/she does that in every single thread, by far the biggest violator of the photo crediting rule. It's a wonder nothing has been done about it.
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Old September 13th, 2011, 07:47 PM   #26473
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Quote:
Originally Posted by The Quiet Storm View Post
Love it! So glad they're permanent!
This picture really confuses me ... if Twin Tower were standing so far to the left why is it that the One World, Trade Center, is now so far away from the fountains? while elsewhere it is depicted so close to fountains?!!!!
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Old September 13th, 2011, 07:56 PM   #26474
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Originally Posted by CharlotteJ View Post
This picture really confuses me ... if Twin Tower were standing so far to the left why is it that the One World, Trade Center, is now so far away from the fountains? while elsewhere it is depicted so close to fountains?!!!!
I think it might just be a trick of the perspective in this photo.
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Old September 13th, 2011, 08:01 PM   #26475
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Maybe she's confusing the tribute in light with the memorial pools. The two aren't the same thing. The tribute in light is a few blocks away from 1WTC.

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Old September 13th, 2011, 09:18 PM   #26476
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Quote:
Originally Posted by CharlotteJ View Post
This picture really confuses me ... if Twin Tower were standing so far to the left why is it that the One World, Trade Center, is now so far away from the fountains? while elsewhere it is depicted so close to fountains?!!!!
It iss really close. This image is taken from the South East Corner of the South Pool. WTC Tower 1 sits to the North West of the North Pool so you have both pools and the pavilion between this spot and the Tower.

Great photo but it should be credited to it's owner not just posted here and made to look like the posters work...
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Old September 13th, 2011, 09:22 PM   #26477
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Originally Posted by Oasis-Bangkok View Post
image hosted on flickr
excellent photo! great view!
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Old September 13th, 2011, 10:34 PM   #26478
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I reckon the job they've made of the whole memorial site looks bloody awesome, but the shafts of light, while amazing, seems to be kind of a shame located a few blocks away. I know the lights are only temporary and there wasn't a plan to light them all the time, but imagine if they could have sunk all those lights into the floor, as a permanent part of the memorial, on the exact outline of the footprints of the original towers. Even if they were only lit one day of they year, it would have been so much more of an accurate tribute.
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Old September 13th, 2011, 11:20 PM   #26479
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Quote:
Originally Posted by Captain Chaos View Post
I reckon the job they've made of the whole memorial site looks bloody awesome, but the shafts of light, while amazing, seems to be kind of a shame located a few blocks away. I know the lights are only temporary and there wasn't a plan to light them all the time, but imagine if they could have sunk all those lights into the floor, as a permanent part of the memorial, on the exact outline of the footprints of the original towers. Even if they were only lit one day of they year, it would have been so much more of an accurate tribute.
Totally agree. They should have done that. I don't know why they didn't.
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Old September 13th, 2011, 11:25 PM   #26480
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Great photos!
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