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Old January 16th, 2015, 05:06 AM   #5621
karimbo
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So, the loooooong hammer head crane seems to be ready.

When is the installation of the skylight going to begin?
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Old January 16th, 2015, 06:02 AM   #5622
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PATH Hall above platform B at WTC Transportation Hub (from WTC Progress page):

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Old January 16th, 2015, 06:07 AM   #5623
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You're right, that boom is huge!

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Old January 16th, 2015, 05:01 PM   #5624
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When do the painting will resume?
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Old January 16th, 2015, 05:35 PM   #5625
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Quote:
Originally Posted by Perennial Quest View Post
It looks like a Liebherr EC-H. They can be setup with radiuses up to 80 meters.
In this case it is a Liebherr 316 EC-H12 with 230' (70m) boom. The long boom is required to reach at both ends of the skylight.


Quote:
Originally Posted by Hudson11 View Post
the boom is so long it looks like if it were turned north it would nearly bash right into the Federal Office Building.
That would be a problem - wouldnt' it? Actually the clearance to the property line of the Federal office Building is approximately 12' - but the clearance to the face of the building is more as it sets back...
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Last edited by NYStruct; January 16th, 2015 at 05:44 PM.
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Old January 16th, 2015, 06:55 PM   #5626
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Quote:
Originally Posted by NYStruct View Post
That would be a problem - wouldnt' it? Actually the clearance to the property line of the Federal office Building is approximately 12' - but the clearance to the face of the building is more as it sets back...
Love such optical illusions based on perspective, though. Like the rafters of the Hub being so long they look like they're touching the future windows of 2+3WTC.
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Old January 16th, 2015, 09:04 PM   #5627
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one thing's certain, they won't be raising any cranes at 2 WTC while this one is there


WTC Transit Center by E Rabeck, on Flickr
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Old January 17th, 2015, 02:06 AM   #5628
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WTC Progress on Facebook..

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Old January 17th, 2015, 02:37 AM   #5629
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A horizontal boom tower crane in NYC?! Aren't they effectively banned because of a few accidents with poor balancing and the huge clearance needed?
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Old January 17th, 2015, 02:56 AM   #5630
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WTC is an expection due to land area.
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Old January 17th, 2015, 04:57 AM   #5631
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Quote:
Originally Posted by uakoops View Post
What's that?

These are the suspended platforms yet to be hooked to the skylight chamber along the north and south arches, they will allow Enclos folks work on skylight installation.
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Old January 17th, 2015, 05:04 AM   #5632
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Is skylight installation due to start right away now that the hammerhead is installed, or will there be a delay for any reason?
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Old January 17th, 2015, 05:21 AM   #5633
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Starts mid February. Rails and such needs to be finished first.
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Old January 17th, 2015, 11:22 AM   #5634
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Old January 17th, 2015, 03:05 PM   #5635
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Never mind
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Old January 17th, 2015, 05:49 PM   #5636
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The boom is on the tower 2 side and as that tower isn't going anywhere soon(much to every ones great frustration and anguish) I think it will be fine for at least the next couple of months
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Old January 17th, 2015, 06:55 PM   #5637
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Some pictures by V. Perrera (jan. 6)

[IMG]http://i61.************/2jdi1dv.jpg[/IMG]

[IMG]http://i60.************/28tl6dx.jpg[/IMG]

[IMG]http://i57.************/10xzk1t.jpg[/IMG]
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Old January 17th, 2015, 07:18 PM   #5638
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Quote:
Originally Posted by weidncol View Post
Starts mid February. Rails and such needs to be finished first.
Yet another example of how there is effectively no cost control for this project. For the construction of a normal building every effort is made to minimize the length of time large cranes like this are on-site because of the exorbitant cost per day of rental. In this case they installed a month before it will actually be needed for the will incur a lot of additional costs with no benefits.
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Old January 17th, 2015, 08:32 PM   #5639
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Quote:
Originally Posted by wtcforever View Post
There's one small problem, as 3 wtc rises it will get in the way of the boom and it will be harder to install the middle sections of the glass without bashing into t3
Seriously..???

There is more than enough space between end of a boom and WTC3.
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Old January 17th, 2015, 10:14 PM   #5640
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Quote:
Originally Posted by weidncol View Post
Starts mid February. Rails and such needs to be finished first.
This is correct.

Hammerhead is going to first install the suspended platforms along the skylight. Then a steel survey will follow with the inspection of mechanical chamber and mounting support geometries; next, railings will be bolted atop of the mounting supports and once completed, skylight glass panels will commence, starting from the abutments towards the center; then, testing of the mechanical systems will follow and finally, after all necessary inspections are finalized, catwalk installation will cap the mechanical systems hidden within the chambers at the north/south arches.

Giving this is an atypical structure, Enclos folks made several revisions to the skylight system, correcting problems presented at the mockup. There are still some concerns on the weather sealing and potential humidity risk at the chambers. I hope everything runs smoothly.
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