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Old January 7th, 2013, 12:10 AM   #5081
Costa&Ribeiro
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This is such a nice view.



Last edited by Costa&Ribeiro; February 16th, 2013 at 11:36 PM.
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Old January 7th, 2013, 12:34 AM   #5082
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Stunning indeed.
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Old January 7th, 2013, 12:36 AM   #5083
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Quote:
Originally Posted by Costa&Ribeiro View Post
This is a such a nice view.
Careful, or you'll fall out.
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Old January 7th, 2013, 01:28 AM   #5084
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These will be incredible units, as expected. I'm sure the exterior will impress as well, as no one wants to live in such a prominent eyesore building at that price point. An exciting project for the .00001% ; ).
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Old January 7th, 2013, 01:07 PM   #5085
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Quote:
Originally Posted by L.A.F.2. View Post
I too am currently taking physics, and I'll try to answer you in the best way I can.

As we all know, the core is the spine for a skyscraper. It supports it and holds it in the sky. By having a wider core at the base, the core's center of mass is lowered and consequentially the tower as well. By lowering the center of mass, the building becomes more and more stable. The reason is that for a structure to topple, the center of gravity of an object must extend beyond where the base touches the ground. By lowering the center of mass, an object must tilt at a much greater angle to extend beyond its base. The Seattle Space Needle has a huge mass that it connects to underground. In fact, it's so massive that its center of mass is underground! So it is impossible for it to fall over in one piece, no exceptions. Back to 432 Park Avenue: Since its center of mass has already been lowered considerably, all it needs is assurance that winds won't tear the upper floors off the building. Therefore, a smaller core is all that is necessary to keep it from toppling, because a large one isn't necessary in this case..

A visual example of what I was referring to:


The base in this case is the side of the box in contact with the inclined plane.
Not only, but the same principle applies to all of the structural parts of the building. For instance, I'm actually studying the structure of Shanghai Tower in order to create a 3D model of it, and I see that each 'n' floors is reduced the thickness of core walls and of perimetral supercolumns; each 'nx2' floors the core is downsized and so on.
In the old Twin Towers, where the structure was made of a steel cage, the size and the thickness of vertical trusses (columns) was smaller and smaller as they were rising.
So it doesn't matter if a supertall shows the same exterior section and shape from base to top (like the 432 Park Avenue or the old WTC), because the internal structure is always made lighter and thinner as the tower rises (also because - and this's intuitive - as the tower rises the parts of the structure are 'called' to sustain less vertical load).
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Old January 7th, 2013, 01:57 PM   #5086
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Thanks for the explanation
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Old January 7th, 2013, 02:20 PM   #5087
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uwooowww..

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Old January 7th, 2013, 02:50 PM   #5088
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Quote:
Originally Posted by Costa&Ribeiro View Post
This is a such a nice view.

right there I woud place my bed.
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Old January 7th, 2013, 04:12 PM   #5089
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Quote:
Originally Posted by billgates View Post
After the first couple of floors, the core shrinks significantly, though.
No, it doesn't...
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Old January 7th, 2013, 04:19 PM   #5090
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The core would shrink somewhat further up than the first couple of floors.
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Old January 7th, 2013, 04:51 PM   #5091
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Quote:
Originally Posted by NotThatGuy View Post
Not only, but the same principle applies to all of the structural parts of the building. For instance, I'm actually studying the structure of Shanghai Tower in order to create a 3D model of it, and I see that each 'n' floors is reduced the thickness of core walls and of perimetral supercolumns; each 'nx2' floors the core is downsized and so on.
In the old Twin Towers, where the structure was made of a steel cage, the size and the thickness of vertical trusses (columns) was smaller and smaller as they were rising.
So it doesn't matter if a supertall shows the same exterior section and shape from base to top (like the 432 Park Avenue or the old WTC), because the internal structure is always made lighter and thinner as the tower rises (also because - and this's intuitive - as the tower rises the parts of the structure are 'called' to sustain less vertical load).
Wow, I didn't know that the original WTC did that with its perimeter steel. Thanks for the info. I figured every structural part of the building would do this, but I wasn't positive.
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Old January 7th, 2013, 05:01 PM   #5092
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Okay, today, there seems to be a truck with what resembles a pole in it that is functioning as a crane lifting items fom the pit on the corner of Park and 56th and dropping them near the real crane. I have never seen this before, and it's really bizarre. Does anyone know what it is?
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Old January 7th, 2013, 05:06 PM   #5093
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I take that back. The weird crane is picking up items by 56th Street. However the main crane is picking up people and dropping them in the pit!
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Old January 7th, 2013, 05:17 PM   #5094
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are my eyes playing tricks on me or has the core forms moved up?
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Old January 7th, 2013, 05:59 PM   #5095
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I just noticed it myself. It's crawling
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Old January 7th, 2013, 08:08 PM   #5096
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Quote:
Originally Posted by Costa&Ribeiro View Post
This deserves a re-post on this page. Simplicity in a very pretty way...

like it
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Old January 7th, 2013, 08:20 PM   #5097
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Quote:
Originally Posted by Rich-E36 View Post
are my eyes playing tricks on me or has the core forms moved up?
I believe it's really moving up
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Old January 7th, 2013, 08:29 PM   #5098
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yesterday:



today:



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Old January 7th, 2013, 09:00 PM   #5099
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Perfect! New York should get more of these huge penciltowers.
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Old January 7th, 2013, 10:04 PM   #5100
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Quote:
Originally Posted by ZZ-II View Post
I believe it's really moving up
Definitively moving up. 1 more floor and they'll have to adjust the angle of the webcam.
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