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Old October 2nd, 2011, 01:07 AM   #27201
germantower
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Don't feed the troll, allthough he trolls in an advanced manner.
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Old October 2nd, 2011, 01:16 AM   #27202
Kanto
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Quote:
Originally Posted by spectre000 View Post
I believe it all depends on where they take the elevation. 1WTC isn't built on 100% flat ground. There is a slight slope. From one side its 1368, another its 1373. Just accept it and move on.
But which one should be accepted as the official one, as the no.1 measure?
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Old October 2nd, 2011, 03:15 AM   #27203
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1373 will be the official height to the parapet. 1787 will be the official height though, although I know you don't care about that.

Last edited by azn_man12345; October 2nd, 2011 at 03:24 AM.
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Old October 2nd, 2011, 03:18 AM   #27204
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Quote:
Originally Posted by Matsky View Post
What means "..."
I have no idea, just a random grumpy moderator I guess lol
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Old October 2nd, 2011, 04:07 AM   #27205
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Quote:
Originally Posted by Kanto View Post
Folks, I find it very frustrating that we don't have a clear number on 1WTC roof height (parapet height). Is it now 1368 feet or 1373 feet? STR and SSP thread say it's 1373 feet but Spectre and SSP diagrams say it's 1368 feet, thats's really confusing
First of all let me clarify that the parapet elevation is not equal to the roof elevation.

Original photo

Usually buildings that display a flat roof at the top also include a small wall called parapet at the very edge of the roof (see image above). In these cases ordinary people don't give importance to the true elevation numbers, since the distance between roof-parapet is pretty small.
But post-modernist & 21st century skyscrapers are far more complicated than their predecessors: new concepts appear and the distance between roof and parapet sometimes varies in a larger rank. This, along many other reasons, caused CTBUH to change their height criteria:

CTBUH changes height criteria, Burj Dubai height increases
Quote:
Also in response to the changing designs and forms of tall buildings, the Height Committee has elected to discard its previous “Height to Roof” category. “The roof category just doesn’t make sense anymore,” said CTBUH Executive Director Antony Wood. “In the era of the flat-topped modernist tower, a clearly defined roof could usually be identified, but in today’s tall building world—which is increasingly adopting elaborate forms, spires, parapets and other features at the top of the building—it is becoming difficult to determine a ‘roof’ at all, even less so to measure to it.”
One WTC is not the exeption, the top of parapet is 33' 8" above the highest point of the roof. I say "highest" because also the roof is not completely flat as many people may think, it is sloped towards drains so rain water can go to collection tanks located at the basement and throughout the tower.

Quote:
Originally Posted by Kanto View Post
But which one should be accepted as the official one, as the no.1 measure?
CTBUH guidelines say that the lowest-open-air entrance should be counted as the official starting point of measurement. I ENCOURAGE you to read these guidelines, as I previously suggested to.




Last edited by Otie; October 2nd, 2011 at 04:12 AM.
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Old October 2nd, 2011, 04:17 AM   #27206
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Quote:
Originally Posted by Otie View Post
I say "highest" because also the roof is not completely flat as many people may think, it is sloped towards drains so rain water can go to collection tanks located at the basement and throughout the tower.
Oh ok, I was wondering about that. Thanks
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Old October 2nd, 2011, 05:53 AM   #27207
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Is 1WTC structurally more akin to older skyscrapers like Empire State building because it has more concrete and reinforced material, rather than a tube structure, or a bit of both? The Twins basically relied on their rigid outer structure for their support. Does 1WTC have a similar design? Btw, I really like the look of the blue reflective glass gives a really modern look to it!
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Old October 2nd, 2011, 07:35 AM   #27208
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^Tower One is a mixture of both: a hybrid tube structure with a monotholitic core. Much of the loads go straight to the core, while the rest to the perimeter columns. The outer structure was designed in such a way that in any event that a column failed, the gravity loads of the floors above travel to alternative load paths in adjacent columns. Unlike the twins, the inner columns that form the core are encased in rebar and super-concrete; the core compressive strength is higher than any other typical office skyscraper; varying from 8,000 psi (used in the roof) up to 14,000 psi (base).
The base is even stronger than the rest of the tower: the entire frame can withstand the loss of as many as 3 of 6 perimeter columns on any side of the podium.

Last edited by Otie; October 2nd, 2011 at 07:44 AM.
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Old October 2nd, 2011, 08:16 AM   #27209
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Otie, those were the two best answers I've seen given to a query anywhere on this forum. Awesome. Very helpful diagram, too!
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Old October 2nd, 2011, 08:24 AM   #27210
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Wow, Otie! I bet you are secretly one of the designers.

EDIT: I'm going to screenshot that answer and save it. ^l^
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Old October 2nd, 2011, 12:03 PM   #27211
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@Otie

Wow, good work! Thanks for this helpful answer.
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Old October 2nd, 2011, 12:39 PM   #27212
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Quote:
Originally Posted by patrick989 View Post
I have no idea, just a random grumpy moderator I guess lol
He's one of the best moderators around here..Maybe he wanted to write something but changed his mind..I don't even know why's that important now..People here just waiting for smallest sign to go off topic..Even 3 dots are enough to make discussion why that guy wrote 3 dots..

Otie, great job in this..
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Old October 2nd, 2011, 12:53 PM   #27213
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image hosted on flickr

One World Trade Center: October 2011 Construction Progress by RBudhu, on Flickr
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Old October 2nd, 2011, 12:57 PM   #27214
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Otie thank you very much for your response. It was very helpfull to me
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Old October 2nd, 2011, 01:01 PM   #27215
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o wow, 3WTC is obviously already above street level. i didn't know that. It looks like it's about 5 meters (16 ft.) tall
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Old October 2nd, 2011, 01:13 PM   #27216
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I think it's time for a new PA cam update

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Old October 2nd, 2011, 01:46 PM   #27217
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My page on the new WTC

http://newyorkyimby.blogspot.com/p/n...de-center.html

I will also be going down to photograph the building very soon, maybe today... will be sure to post pictures here! It's rising so fast now!
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Old October 2nd, 2011, 03:19 PM   #27218
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1 WTC is certainly a nice building but to me it does not seem to be a really jaw-dropping project. 1 WTC could do way better if they would replace the oversized antenna with additional floors. 1 WTC will look like a average skyscraper in a few years not beeing capable to substitute for the lack of the twin towers in any way.

In the league of supertalls 1 WTC looks a bit boring and not too cutting edge. Check out http://skyscraperpage.com/diagrams/?searchID=201 to see where I got this impression from.
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Old October 2nd, 2011, 03:39 PM   #27219
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Quote:
Originally Posted by Kanto
I think it's time for a new PA cam update
I have this webcam as my desktop background
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Old October 2nd, 2011, 03:45 PM   #27220
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@radiantbeamer

1: It isn't an antenna, it's a spire!!!!
2: I've already said it too, I think the spire is oversized, but what shall I do? I have to live with that
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