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Old May 3rd, 2014, 02:29 AM   #961
thejacko5
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Quote:
Originally Posted by JuanPaulo View Post
As a structural engineer, I am puzzled as how they would do this. If the cantilevered balconies are not a continuous extension of the interior slab,then they will need to be attached to the slab edge. It is difficult to tell from the pictures if there is a downturned or upturned beam at the perimeter to which the balconies would attach to - it looks to me like the slab is just thick, whithout any perimeter beams. It would be very difficult, if not impossible, to attach to a member with such a shallow thickness. Further, you would see some embedded plates or other type of mechanical fittings for the connection of the balcony sub-structures to the edges of the floor plate - I see none.
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Old May 3rd, 2014, 06:36 AM   #962
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crane spotting on the skyline

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Old May 3rd, 2014, 12:26 PM   #963
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Quote:
Originally Posted by JuanPaulo View Post
The bottom of the balcony slab should be in line with the bottom of the interior slab. We see that those platforms have steel plates over steel I-beams over the top of the interior slab. These are staging platforms, not balcony formwork.
Those I-beams over the interior floor slabs are indeed staging platforms but they are used to support balcony formwork platforms one floor above. Obviously you can't just pour concrete in the thin air - you need some kind of support below. Look at the picture below. I think it's self explanatory. Formwork platforms that are above I-beam staging platforms are perfectly in line with the interior slab.



Quote:
Originally Posted by JuanPaulo View Post
In regards to patrykus idea of "crushing", if you are doing new construction, you would never want to go back and have to demolish [crush?] something to be able to continue the work. It is just unacceptable and unpractical from a construction and business perspective. You might as well pour the balconies in place with the interior slab if you have to go back and do significant demolition/preparation of the slab edge for the attachment of the balconies.
Well since in my opinion they are building balconies now they have to do it somehow. And I think there could be some potential advantages to the method I proposed. First of all it doesn't require any change in formwork configuration during floor construction, and even protruding rebars would possibly require such change. Second when few floors are ready you can work on balconies on several floors at once so all of that adds to the construction speed. They could of course leave intents at every balcony location but that would mean a lot of formwork customization, and obviously we know they didn't do that.
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Last edited by patrykus; May 3rd, 2014 at 12:32 PM.
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Old May 3rd, 2014, 04:32 PM   #964
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Zooming the picture No. 4 @#99 post #945 can be seen in longitudinal grooves in the thickness of the floors that will be extended to form overhanging balconies .... probably need to create the mechanical connection probably also thermal break between the two slabs in reinforced concrete (type HALFEN GROUNTING)... the composition of the balconies , in the first story follows the rhythm balcony , no balcony , balcony and then you flip the facade perpendicular balcony no balcony, no balcony ...



zooming in even more ... you can clearly see the insole also just realized that corroborates the account of @ patrykus

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Old May 7th, 2014, 03:29 AM   #965
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Crane on the skyline.

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Old May 9th, 2014, 01:14 AM   #966
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Starting to make its presence felt

http://cdn.cstatic.net/images/gridfs...terrace_04.jpg


And look who else is making an appearance

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Old May 9th, 2014, 03:31 AM   #967
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Looks like were on the 23rd floor judging by the construction elevator.
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Old May 19th, 2014, 09:13 PM   #968
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It's been a while. Anyone in the area have any updates.
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Old May 20th, 2014, 01:26 AM   #969
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Quote:
Originally Posted by AAndreAA View Post
Zooming the picture No. 4 @#99 post #945 can be seen in longitudinal grooves in the thickness of the floors that will be extended to form overhanging balconies .... probably need to create the mechanical connection probably also thermal break between the two slabs in reinforced concrete (type HALFEN GROUNTING)... the composition of the balconies , in the first story follows the rhythm balcony , no balcony , balcony and then you flip the facade perpendicular balcony no balcony, no balcony ...
You can also see what looks to be rebar sticking out through the groove. As mentioned by several earlier posters however I don't see how the balconies themselves are going to be supported with such a small connection interface.
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Old May 21st, 2014, 07:56 AM   #970
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Here's some photos I took of 56 Leonard on saturday, that show that indeed they are starting to add balconies sorry for the iPhone quality.





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Old May 25th, 2014, 04:04 AM   #971
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Taken Wednesday by me:
DSC03360 by kevinleclerc963, on Flickr


30 Park place in the foreground:


DSC03361 by kevinleclerc963, on Flickr
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Old May 25th, 2014, 12:26 PM   #972
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Quote:
Originally Posted by patrykus View Post
Well since in my opinion they are building balconies now they have to do it somehow. And I think there could be some potential advantages to the method I proposed.
You are right, you can sometimes see in construction that something is built not exactly as it has to be for the sake of speed and then everything not needed is chipped away.

BUT there's an important drawback and the NYC building authorities would probably NEVER allow it because of that drawback: You would have an inner city high-rise construction site where there's construction and demolition going on at the same time with the possibility of debris falling down on workers and/or the street. That's definitely a No-No!
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Old May 27th, 2014, 06:08 PM   #973
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Passed by two days ago, they were working on the 27th floor; That is 334ft/101.8m
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Old May 27th, 2014, 08:49 PM   #974
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Tower Dude you gotta shrink those photos... I have been scrolling to the quick reply since you posted several days ago
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Old May 27th, 2014, 08:54 PM   #975
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another 200+ meter tower
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Old May 28th, 2014, 09:36 AM   #976
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another 200+ meter tower
Thank you for that brilliant observation.
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Old May 28th, 2014, 11:41 AM   #977
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A look at the concrete (from May 14):

56 Leonard by isaiahk, on Flickr
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Old May 28th, 2014, 05:48 PM   #978
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Love that last image
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Old May 31st, 2014, 11:39 PM   #979
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May 31st, 2014





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Old June 1st, 2014, 06:09 PM   #980
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Quote:
Originally Posted by GOL2007 View Post
You are right, you can sometimes see in construction that something is built not exactly as it has to be for the sake of speed and then everything not needed is chipped away.

BUT there's an important drawback and the NYC building authorities would probably NEVER allow it because of that drawback: You would have an inner city high-rise construction site where there's construction and demolition going on at the same time with the possibility of debris falling down on workers and/or the street. That's definitely a No-No!
If they would have to cut a little in the floors. They would definately have protection for debris.
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