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Supertalls Discussions of projects under construction between 300-599m/1,000-1,999ft tall.
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Old February 7th, 2016, 02:35 AM   #2621
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Quote:
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The steel from the original Steinway building is still there although the tower seems to be ready to rise. As you can see in the renders, the tower rises above where the exposed steel from the Steinway building currently stands.
I just don't understand how they'll incorporate the old steel into the structure of the new tower.

I don't think they can do that. This is a reinforced concrete tower, those old I beams have no place in this design.
I also do not think this is going full steam ahead just yet. There's talking about whether it's going union or not and there's not much activity on the site. 50 West street is practically done and I think this was already supposedly 'under construction' when that one was sill a hole in the ground.
If I had to make a wild guess I'd say they'll keep the snail pace until they figure out the union/non union issue and keep it formally under construction in order to not stir things up with the investors but it'll really start shooting up a little later.
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Old February 7th, 2016, 04:27 AM   #2622
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That would make more sense. However, that brings another question, why would they build the foundation up to ground level if there's more demo left to be done? Why not just finish the demo work first?
I can't recall a construction site working on the the foundation and elements of the superstructure before finishing up demo work. Sounds like a logistical nightmare especially in such a tiny site.

Last edited by Ghostface79; February 7th, 2016 at 04:45 AM.
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Old February 7th, 2016, 12:58 PM   #2623
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Quote:
Originally Posted by Ghostface79 View Post
That would make more sense. However, that brings another question, why would they build the foundation up to ground level if there's more demo left to be done? Why not just finish the demo work first?
I can't recall a construction site working on the the foundation and elements of the superstructure before finishing up demo work. Sounds like a logistical nightmare especially in such a tiny site.
in some cases the basement\foundation systems of the proposed building are designed to integrate themselves into the foundations of the structures adjacent to the site, if you consider this buildings irregular footprint, and all the lateral load transfer in the above grade structure, the demolition of all the structures at once could perhaps be cause to damage the substructures of adjacent property(s) sometimes a structure must not be removed until the new structure is built adjacent to, or around it to offset the possibility of this damage,

i would be interested in seeing this buildings foundation plan, i'll bet it's intense !
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Old February 7th, 2016, 05:11 PM   #2624
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Hi guys!

There is the progress during the month of January.



Thank you!!!
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Old February 7th, 2016, 10:43 PM   #2625
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That would make more sense. However, that brings another question, why would they build the foundation up to ground level if there's more demo left to be done? Why not just finish the demo work first?
I can't recall a construction site working on the the foundation and elements of the superstructure before finishing up demo work. Sounds like a logistical nightmare especially in such a tiny site.
Because it is not just demolition work. In the existing building they seem to be doing some works to reinforce/modify the structure in order to be able to slice that small piece of the building.

While they are doing that work, they can gain time working with the fundations, since not necessarily both works collide. The existing building only overlaps with a small part of the footprint of the new tower and they would have take the provisons so they can began working in the fundations.

I think they will remove that part of the existing building, but doing that wouldn't take much work or time. They can do that just in a couple of days, it is just some guys with acetylene cutters that can do that job pretty quickly.

The work that must have take them all this time is the reinforcement of the existing structure, a work that is being made in the inside of the building so we are not able to see it, but removing the part of the building they want to get rid of, shouldn't take so long.

I am not sure of what is the work they are doing inside, so it is just a guess, but I think they are doing something similar to this:
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Old February 7th, 2016, 11:32 PM   #2626
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Maybe they don't remove the old steel colums at all, and just let them stand as they are. So the old stainway may remain structurally like before, and the new tower has his load bearing walls inside the old building, but without both buildings beeing attached to each other (structurally, obviously they have to on the facade, roof, surface, etc to keep the weather outside).

But how it will turn out I don't now either. We'll see in the future
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Old February 11th, 2016, 10:41 PM   #2627
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Quote:
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Hugh Ferriss depicts opening night, 1925. From JDS Instagram:

Very cool idea to recreate this hall!!!. Just love it!
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Old February 15th, 2016, 05:43 AM   #2628
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From yesterday.







Looks like the tower is about to take off. I am surprised there was no piling or any excavation more than about 10 ft done. Can somebody explain how a 1400 ft super slim tower be constructed without deep foundation?
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Old February 15th, 2016, 05:56 AM   #2629
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^ Bedrock ^
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Old February 15th, 2016, 02:16 PM   #2630
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Who can indentify the two supercolums facing 57th street in the construction pics by ILNY?
The entrance to the elevator gallery is also already visible in the shape of the rebar, I think.

Floorplan might help:

http://ny.curbed.com/archives/2014/1...r_revealed.php
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Old February 15th, 2016, 11:28 PM   #2631
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I believe the right one is on the left side of the crane tower and the left one is just to the right of the left wall. Remember that the tower is recessed from 57th and not centered in the hole.
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Old February 16th, 2016, 07:28 AM   #2632
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Quote:
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^ Bedrock ^
They dug down at least 40-50 feet and then piled down from there probably a hundred feet or more. Since there is no parking, a deep basement is rather useless other than for utilities
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Old February 16th, 2016, 08:03 AM   #2633
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They dug down at least 40-50 feet and then piled down from there probably a hundred feet or more. Since there is no parking, a deep basement is rather useless other than for utilities
I have been watching construction progress, they did not dig more than 10-15ft, also there was no piling.
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Old February 16th, 2016, 05:21 PM   #2634
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Quote:
Originally Posted by ILNY View Post
From yesterday.


Looks like the tower is about to take off. I am surprised there was no piling or any excavation more than about 10 ft done. Can somebody explain how a 1400 ft super slim tower be constructed without deep foundation?
Deep foundations connect a tower to bedrock. In Manhattan there are lots of places where bedrock is basically at the surface so there is no need for the typical deep foundations.
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Old February 16th, 2016, 09:47 PM   #2635
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I guess this means that when the tower is connected to the bedrock, the whole bedrock functions as fundation? It's probably comparable solid as concrete.
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Old February 16th, 2016, 09:50 PM   #2636
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Quote:
Originally Posted by Crowns n' Spires View Post
I guess this means that when the tower is connected to the bedrock, the whole bedrock functions as fundation? It's probably comparable solid as concrete.
It means the soil [bedrock in this case] is strong enough to support the weight of the tower and added vertical reactions that result from lateral forces such as wind. Its like a person standing on solid rock, instead of sand.
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Old February 17th, 2016, 04:15 PM   #2637
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As some have said, the bedrock is basically at the surface here, so they can just sit the building atop it.

But I read that since the building is so slim, they have to anchor it to the rock, rather than just putting it above it, as in a more broader building they would be able to do.

I read that they had to introduce some cables several meters, diagonally, into the bedrock so they can't prevent the builing to topple. (I think they did the same with 432 Park ave)

I don't know what kind of equipment they use for that, but I guess it is not very big, so that would another work that they were doing in the past months (besides internal work in the existing building) but we weren't able to saw it, and it looked like they weren't progressing.
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Old February 18th, 2016, 03:30 AM   #2638
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I just really surprised how they could build a super slim tower in this super small place, it must be a surprising technique .I just hope this building won't crash, because it looks really scary.
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Old February 18th, 2016, 04:37 AM   #2639
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Any updates?
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Old February 18th, 2016, 04:57 AM   #2640
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1,495 feet high?

Curbed has an interview with the interior designer of this building and he is quoted as saying the building will be 1,495 feet high.
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