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  #2381  
Old Posted Jan 11, 2008, 2:49 PM
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Quote:
Originally Posted by MikeS View Post
Can anyone please tell me why the green epoxy coated rebar is used in certain areas of the foundation and not in others? Thanks in advance.
In Chicago it is vinyl coated (from GE), used in parking and roadways where salt is expected.



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  #2382  
Old Posted Jan 11, 2008, 3:28 PM
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This is the only building i've ever known whose height makes a political statement.
     
     
  #2383  
Old Posted Jan 11, 2008, 4:43 PM
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Not really, Phil... you really don't think China's government is "making a political statement" by the supertall building it encourages in Shanghai, for example?

The FT is fairly unique in attaching significance to the exact height figure, that is true, though.
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  #2384  
Old Posted Jan 13, 2008, 3:59 AM
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Hi Everyone,

Interesting article in the times about excavation of the eastern bathtub area:

http://nytimes.com/2008/01/13/nyregion/13rebuild.html

Also, some nice 360 degree panoramic shots inside the bathtub, together with audio, check them out:

http://www.nytimes.com/interactive/2...#/content=80ft

Hope you guys enjoy, Ciao
     
     
  #2385  
Old Posted Jan 13, 2008, 11:02 AM
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Thank you TAK, nice article and panoramas
     
     
  #2386  
Old Posted Jan 15, 2008, 6:32 PM
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It's rising!


(earthcam)
     
     
  #2387  
Old Posted Jan 15, 2008, 7:00 PM
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I like the looks of that. It is starting to rise. That's encouraging.
     
     
  #2388  
Old Posted Jan 15, 2008, 7:17 PM
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I like the looks of that. It is starting to rise. That's encouraging.
Finally. When it's all said and done, this thing's going to be in the Guinness Book of World Records under "slowest construction."
     
     
  #2389  
Old Posted Jan 15, 2008, 7:26 PM
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It's nice to see thios one finally going upwards. I'm hoping that when i'm in NYC this summer it will have made some height.
     
     
  #2390  
Old Posted Jan 15, 2008, 9:17 PM
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It's rising!


(earthcam)


Yeah, I think that the core has to rise to the height of those steel beams before any of the girders and be fastened between the core and the columns.

But it will be great to see when it does!!
     
     
  #2391  
Old Posted Jan 15, 2008, 11:35 PM
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[QUOTE=harryc;3275012]In Chicago it is vinyl coated (from GE), used in parking and roadways where salt is expected.

It's definately epoxy coated rebar, not vinyl coated.

And a follow-up to the original question: It's used where water will be in contact with the concrete and especially in bridges where salt is used so that it keeps the rebar from rusting. When rebar rusts, that's when concrete structures fall apart.

Concrete has excellent compressive strength, but isn't very good for shear strength or tensile strength. when you add rebar, the rebar adds the shear and the tensile strength. If the rebar rusts, that added tensile and shear strength is compromised.
     
     
  #2392  
Old Posted Jan 16, 2008, 12:18 AM
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Finally. When it's all said and done, this thing's going to be in the Guinness Book of World Records under "slowest construction."


That's because it's such a massive project.
     
     
  #2393  
Old Posted Jan 16, 2008, 12:21 AM
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It Looks Like It Has A Double Core...
     
     
  #2394  
Old Posted Jan 16, 2008, 4:42 AM
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Great to see it rising.
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  #2395  
Old Posted Jan 16, 2008, 3:42 PM
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Finally. When it's all said and done, this thing's going to be in the Guinness Book of World Records under "slowest construction."
...or ugliest

ô¿ô
     
     
  #2396  
Old Posted Jan 17, 2008, 12:21 AM
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...or ugliest

ô¿ô
Must be a Twin Tower fan...
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  #2397  
Old Posted Jan 17, 2008, 3:20 AM
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...or ugliest

ô¿ô
what's so ugly about it
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  #2398  
Old Posted Jan 17, 2008, 2:33 PM
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Must be a Twin Tower fan...
Absolutely not!

Quote:
Originally Posted by Chi649 View Post
what's so ugly about it
As an extraordinarily tall guy (hence the name), I can tell you that tall does not necessarily equal pretty.

The design is unimaginative and blocky, and looks like an oversized paperweight or one of those obelisks that Pier One sells. It's a basic geometric shape without character.

If their goal was to develop as "vanilla" a design as possible, they've succeeded. Personally, I would think they'd want a remarkable design, not something plain and unoffensive. This building doesn't say "We're back!", it says "We're sorry...please don't hit us again."

ô¿ô
     
     
  #2399  
Old Posted Jan 17, 2008, 7:27 PM
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I like this tower, it'd going to be nice to see it hit the skyline.
     
     
  #2400  
Old Posted Jan 17, 2008, 10:07 PM
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Can't see the white (painted) part of those other two or three steel columns
anymore, as they've been permenantly burried now in the comcrete.
     
     
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