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Old August 13th, 2009, 08:59 PM   #9821
Onn
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Looks like we might only be getting one today guys, the rain may be hampering installation. But one is obviously still a lot better than none. These columns are quite large.
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Old August 13th, 2009, 09:50 PM   #9822
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Quote:
Originally Posted by Onn View Post
Looks like we might only be getting one today guys, the rain may be hampering installation. But one is obviously still a lot better than none. These columns are quite large.
the weather has been terrible this year in northeast, rain, rain and rain
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Old August 13th, 2009, 10:27 PM   #9823
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Quote:
Originally Posted by Onn View Post
Looks like we might only be getting one today guys, the rain may be hampering installation. But one is obviously still a lot better than none. These columns are quite large.
I hope that's what the problem is. They say they'll all be in by the fall, so I wonder if they mean before September 22nd or by the end of fall? I'm hoping September 22nd.
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Old August 13th, 2009, 10:49 PM   #9824
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How do they get the 60 feet, 60 tons columns into the city, by ship?

The transport itself has to be quite a task...
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Old August 13th, 2009, 10:59 PM   #9825
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Originally Posted by GOL2007 View Post
How do they get the 60 feet, 60 tons columns into the city, by ship?

The transport itself has to be quite a task...
Probably. Big container ships can carry like 100,000 tons so a few 60 tons columns shouldn't be a big problem.
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Old August 13th, 2009, 11:07 PM   #9826
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So 22 columns to go, should be possible in a few weeks... It's becoming something here, finaly!
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Old August 13th, 2009, 11:10 PM   #9827
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This might be a little random and off topic, but I was thinking, it's going to be real difficult to clean the flat sides of the tower with the window washers because there's really no space to hang anything from above once they reach the top, especially to cover the whole wall of the building.

See what I mean?

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Old August 13th, 2009, 11:50 PM   #9828
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How do that clean the facades of other skyscrapers that have a similar shape?
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Old August 14th, 2009, 12:21 AM   #9829
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It will likely be an adjustable arm like they have at Hearst and BOFA.
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Old August 14th, 2009, 12:23 AM   #9830
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Quote:
Originally Posted by GOL2007 View Post
How do they get the 60 feet, 60 tons columns into the city, by ship?

The transport itself has to be quite a task...
Drive it through the Lincoln Tunnel from the Port of Elizabeth most likely early in the morning.

EDIT: sorry for the double post.
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Old August 14th, 2009, 12:28 AM   #9831
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If it's possible to clean this one- cleaning 1WTC should be a piece of cake:

image hosted on flickr
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Old August 14th, 2009, 01:05 AM   #9832
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Quote:
Originally Posted by GOL2007 View Post
How do they get the 60 feet, 60 tons columns into the city, by ship?

The transport itself has to be quite a task...
The PA website said that they are being trucked in from New Jersey over the George Washington Bridge.
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Old August 14th, 2009, 02:29 AM   #9833
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Quote:
Originally Posted by uakoops View Post
Funny, they're using a cherry picker right now to get to the top of the new column. There are plenty of cherry pickers that can reach 60'+ (i've seen them up to 110 feet).

The platform is for when they atach all the beams that meet at the top there. They need a bunch of workers there, more than one or two cherry pickers can hold.

BTW if you want to see some really elaborate scaffolding, check out the Tokyo Sky Tree thread.
JLG, Genie and Snorkle all make bucket lifts that reach up to 135 feet. We used 8 of the JLG's when we were erecting the "entrance towers" at the Prudential Center in Newark.
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Old August 14th, 2009, 02:31 AM   #9834
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Quote:
Originally Posted by Jay View Post
This might be a little random and off topic, but I was thinking, it's going to be real difficult to clean the flat sides of the tower with the window washers because there's really no space to hang anything from above once they reach the top, especially to cover the whole wall of the building.

See what I mean?
Funny you should mention this, I have the Window Washing prints here with me at home. Below the communications platforms on the roof there well be a circular track that 3 window washing cranes ride on. These cranes have a horizontal telescoping arm that can adjust to the slope of the curtain wall by moving in or out. They can also reach the vertical sides of the building. The scaffold that the window washers ride on is hung from a beam at the end of the crane arm giving them horizontal travel.

They really did think of everything when they designed this baby.

PS: The window washing cranes are the main reasion that an observation platform can not be built on the roof.

Last edited by Zensteeldude; August 14th, 2009 at 02:56 AM.
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Old August 14th, 2009, 03:08 AM   #9835
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? Who do you think paid the $276 million? The PA, if they were diligent with the public's money they would have reviewed all aspects of the project to ensure it was being done in the most efficient way possible.

Not really, I've managed many projects just as complex that involved hazardous chemicals so they were even more critical and there's still seems like a significant overkill. Also I'd be extremely surprised if they did this for every column, for some reason I'm thinking they just did it on the first one. There's no such rule, any work done above 6 feet needs fall protection, no matter how much higher and there are strict regulations covering what kind of fall protection is required. You certainly don't see platforms like that built while very high steel is being erected, so it looks very strange here. Besides at this site manlifts and crane baskets would be very effective alternatives.

Special platforms are quite often used on bridges but they're a different matter entirely due to accessibility issues.
Matter one: The PA through Tishman DID get the LOWEST bids for the project!!! (I could not pick a better steel contractor than DCM)

Matter Two: I refer you to the OSHA manuals on steel erection. (I well say no more on this topic)

PS: there is far more than the outer connections to deal with, as I said in the past the outside of the second floor hangs from the third floor. Access is needed for these hangers and the subsequent floor beams of the second floor.


Bottom line, NOTHING I have seen so far is above and beyond what is mandated by OSHA or the AISC.

I consider this matter closed and I well not make anymore replays to this topic.
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Old August 14th, 2009, 03:21 AM   #9836
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How long did it take them to put that platform up? Less than an hour?
How much time and money would they spend procuring crane or manlift service and coordinating it's use on a busy site? How much inefficiency because they're not going to be there on demand but only at planned times?
You don't need fall protection whenever you're above six feet. Only when there's no railing of required height preventing you from falling in the first place.
Those platforms are the cheapest and easiest ways to get people where they need to be by a long shot. You have two crane operations, to put them up and take them down.
If they're welding those beasts, it's not going to be a small job. I weld, but I have no idea how they'd go about it with Beamzilla there.

Last edited by Nomadd22; August 14th, 2009 at 03:27 AM.
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Old August 14th, 2009, 04:06 AM   #9837
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Quote:
Originally Posted by Nomadd22 View Post
How long did it take them to put that platform up? Less than an hour?
How much time and money would they spend procuring crane or manlift service and coordinating it's use on a busy site? How much inefficiency because they're not going to be there on demand but only at planned times?
You don't need fall protection whenever you're above six feet. Only when there's no railing of required height preventing you from falling in the first place.
Those platforms are the cheapest and easiest ways to get people where they need to be by a long shot. You have two crane operations, to put them up and take them down.
If they're welding those beasts, it's not going to be a small job. I weld, but I have no idea how they'd go about it with Beamzilla there.
The short version is pre heating to 260+ degrees followed by horizontal passes with E 8018 welding rod followed by post heating. Repeat untell the 5 inch thick flange is filled.

PS: I'm also an AWS Certified welder. D1.1 and D 1.5 all positions.
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Old August 14th, 2009, 04:13 AM   #9838
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Zen, do you work on this site? How do you know so much about all of this?
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Old August 14th, 2009, 04:16 AM   #9839
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Quote:
Originally Posted by Uaarkson View Post
Zen, do you work on this site? How do you know so much about all of this?
I work for a company that bid on the project and I have all the prints for Tower One and The Memorial.

By work for I mean I am part owner of.
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Old August 14th, 2009, 04:18 AM   #9840
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Quote:
Originally Posted by Uaarkson View Post
Zen, do you work on this site? How do you know so much about all of this?
because
Quote:
Originally Posted by Zensteeldude View Post

PS: I'm also an AWS Certified welder. D1.1 and D 1.5 all positions.
????
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