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Old November 13th, 2010, 01:59 PM   #17501
christos-greece
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They put concrete in the steel columns? That will be done in all floors of WTC1?
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Old November 13th, 2010, 02:11 PM   #17502
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Quote:
Originally Posted by christos-greece
They put concrete in the steel columns? That will be done in all floors of WTC1?
no its fireproofing,i am pretty excited that the corner cladding arrived this morning
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Old November 13th, 2010, 05:31 PM   #17503
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Hi, I'm new here. I have already read the forum for more than 1 year, but I have now decided to participate actively in the forum.

1 World Trade Center is my favourite supertall project! And I can not wait to finally see the cladding being installed. Since July, everytime I visit this thread I hope so bad to see some pictures of the tower with the cladding - in vain. But I think now the time has finally come..
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Old November 13th, 2010, 05:36 PM   #17504
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i'm not sure if this is a peice of cladding or not but it looks huge compared to the two guys right below it
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Old November 13th, 2010, 06:16 PM   #17505
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Originally Posted by bbtran72 View Post
i'm not sure if this is a peice of cladding or not but it looks huge compared to the two guys right below it
yes,it looks like the stainless steel corners. so it wil not be long now
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Old November 13th, 2010, 06:17 PM   #17506
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they are white because of the protecting layer thats on it
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Old November 13th, 2010, 06:29 PM   #17507
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another floor is done with fireproofing
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Old November 13th, 2010, 06:33 PM   #17508
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[IMG][/IMG]
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Old November 13th, 2010, 06:35 PM   #17509
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If you see they unwrapin' that piece, you know what's goin' on..
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Old November 13th, 2010, 06:38 PM   #17510
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looks like those three floors are first with cladding
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Old November 13th, 2010, 07:47 PM   #17511
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Quote:
Originally Posted by westmc9th View Post
no its fireproofing,i am pretty excited that the corner cladding arrived this morning
Well actually, thats not entirely true. I believe that the fireproofing has concrete mixed in it, increasing its strength. Im still not sure why they didnt just encase all the steel in concrete if theyre so damned concerned about fire.
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Old November 13th, 2010, 08:17 PM   #17512
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Well actually, thats not entirely true. I believe that the fireproofing has concrete mixed in it, increasing its strength. Im still not sure why they didnt just encase all the steel in concrete if theyre so damned concerned about fire.
$$$$$ and more $$$$

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Old November 13th, 2010, 08:43 PM   #17513
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Quote:
Originally Posted by Handbanana View Post
Well actually, thats not entirely true. I believe that the fireproofing has concrete mixed in it, increasing its strength. Im still not sure why they didnt just encase all the steel in concrete if theyre so damned concerned about fire.
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$$$$$ and more $$$$

No.
First: fireproofing is required by law. So it'n not that "they're so damned concerned about fire", but it is required for obvious safety precautions, and the quantity and kind of fireproofing depends by the structure that is being treated.

Second: encasing the steel in concrete creates a far greater load on the structure than a light composite like fireproofing. Greater loads means different beams used, bigger base columns, more space used in general and (unnecessary) increase in costs. In one word: dumb. Since there is an alternate solution given the specifications of the building.
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Old November 13th, 2010, 09:34 PM   #17514
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Encasing steel in concrete will increase its fire resistance but can also increase its structural strength. A column at the base of a tall building will be subject to very high compressive stresses and, in the case of an H - column, the most likely failure mode is due to local buckling of the arms of the H, rather than crushing of the steel. Encasing in concrete prevents the steel from buckling and, therefore, increases the amount of load that it can carry, even if the concrete itself takes none of the direct load of the structure.

There are different techniques for fire-proofing. Encasing in concrete is one technique but it does add weight to the building and can be expensive to apply. Sprayed on mineral fibre is cheap and effective but cannot be used in exposed work because of its appearance. Intumescent paint is preferred by architects as it does not affect the appearance of the column and adds little or on weight to the building. In the event of fire, the paint bubbles up to form an insulating layer which delays the heat of the fire from getting into the structural column - which is the whole point of fireproofing.
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Old November 13th, 2010, 10:19 PM   #17515
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By GreenwichBoy, 11-13-10.



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Old November 13th, 2010, 10:23 PM   #17516
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its the same with me i've visited this thread every day but didnt write anything... and of course this is my favourite project in the world
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Old November 13th, 2010, 10:47 PM   #17517
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Welcome to the fourm, guys

And, withal, this is the thread that first brought me to Skyscrapercity.

I have a question. Does anyone know if that fountain is running at maximum capacity over there? Or is it still in its testing phase. I'm saying this because the water flow seems a bit low, I was expecting it to be a little more.. potent
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Old November 13th, 2010, 11:20 PM   #17518
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Those corner clads look really big will those be going on the higher floors?
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Old November 13th, 2010, 11:27 PM   #17519
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Quote:
Originally Posted by waddler View Post
Welcome to the fourm, guys

And, withal, this is the thread that first brought me to Skyscrapercity.

I have a question. Does anyone know if that fountain is running at maximum capacity over there? Or is it still in its testing phase. I'm saying this because the water flow seems a bit low, I was expecting it to be a little more.. potent
The water flow seems to be low, but it isn't. The waterfall is 240 meter wide! I don't know how much water they need to produce a constant waterfall of that size, but it's a lot. Don't expect the kind of continuous spray the Niagara Falls or Victoria Falls produce. The hole is not deep enough.

I like it as it is.

But this is not the right place for this topic. Go on here: National September 11 Memorial & Museum


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Those corner clads look really big will those be going on the higher floors?
NO. Those corner clads look pretty equal to 90 degree. Only the 20th floor and the parapet will have 90 degree corners!

Last edited by OldWorldResident; November 13th, 2010 at 11:38 PM.
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Old November 13th, 2010, 11:36 PM   #17520
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Thanks for the thread dude, I had no idea about it.
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