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Old February 25th, 2009, 06:21 AM   #7661
adam-albany
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Quote:
Originally Posted by OptomistOne View Post
Okay, I am no expert either but it seems to me that no way is the steel work seen so far hefty enough to support a 500m high building.
That's just the concrete core. The building's footprint will be much larger:
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Old February 25th, 2009, 02:53 PM   #7662
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They could probably build the tower without using this steel if they wanted. But it will give the core more tensile strength, which is important during hurricanes, earthquakes and collisions, and since the floors will be attached to the steel frame instead of just being bolted to the concrete, it will distribute the load of something hitting the tower over a much larger core area and make the core a lot more resistant to damage from direct impacts to it. At least, if the steel frames go all the way up the core, which I can't swear to. Bet ZenSteelDude knows though.
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Old February 25th, 2009, 04:13 PM   #7663
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so relived to see north core risen. Looks like the south core's crane is choking, it has to jump sometime soon.
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Old February 25th, 2009, 05:32 PM   #7664
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Yes!!! We lift off!!!!!




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Old February 25th, 2009, 06:19 PM   #7665
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Quote:
Originally Posted by Gendo View Post
I guess if you changed your settings. I could restate that I'm not combing through 7665 replies to find the info he refers to.

Seems to me its Meh_CD doing the moaning and whining about those of us who asked the question (I noticed I wasn't the only one in the last 2 pages).
Try the search function. And just to prove my point I tried the search function and the answer to your question was the second result and it was only a whopping four pages back from your original post.
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Old February 25th, 2009, 06:24 PM   #7666
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Yes! Now it's moving along faster! Can't wait to see what it looks like at the end of the year!
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Old February 25th, 2009, 07:17 PM   #7667
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Quote:
Originally Posted by buildmilehightower View Post
so relived to see north core risen.
4 floors more and the north core has the same level as the south
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Old February 26th, 2009, 02:07 AM   #7668
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Gendo, here is the information you seek. The columns hanging in space are waiting for the north half of the core to catch up.


Quote:
Originally Posted by Zensteeldude View Post
One of the reasons for the erecting steel is to give the floor beams something to bolt too,(notice all the shear tabs for floor beams) this speeds construction because the steel erection doesn't need to wait for the core cement (to a point, there is a height limit before it's encased in concrete). The beams also act as headers above core wall openings.
Below is a plan view of the floor framing, it's not of any particular floor.

http://www.flickr.com/photos/3512479...n/photostream/

Everything below the second floor except the perimeter columns is cast concrete, there's no need to bolt floor beams to the core because there are none.


Nomadd22, concrete is much stronger than steel under compression. Steel is much stronger than concrete under tension. If not for the above stated purposes the erecting steel would just take up room that could be filled with cement and re-bar.

Geez, I go on vacation for a few days and the place goes to hell.

As others have stated I have a full set of prints for Tower One and am happy to answer any questions as long as they do not involve classified information.

Last edited by Zensteeldude; February 26th, 2009 at 02:13 AM.
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Old February 26th, 2009, 09:40 AM   #7669
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I'm in the city right now no camera so no pics. I don't think I'll be visiting ground zero anytme soon I'll have to really think it over
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Old February 26th, 2009, 02:35 PM   #7670
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Quote:
Originally Posted by ZZ-II View Post
4 floors more and the north core has the same level as the south
sounds like such a short amount of time, but...
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Old February 26th, 2009, 05:33 PM   #7671
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It looks like they're starting on the last final piece of the South Tower pool today (the northwest corner) not over the PATH tracks. This is really puzzling... They still have the entire east half of the pool (the part over the PATH tracks) to complete. I understand they can only work on this half when the PATH trains are shut down, but if they continue to build up the other half of the pool, how are they eventually going to reach the east side??? Won't it put the red crawler crane too far out of reach?

Anyone know how they will install the steel over the PATH tracks? And, also, WHEN will the steel over the tracks be installed?
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Old February 26th, 2009, 07:49 PM   #7672
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Quote:
Originally Posted by RKOwens View Post
It looks like they're starting on the last final piece of the South Tower pool today (the northwest corner) not over the PATH tracks. This is really puzzling... They still have the entire east half of the pool (the part over the PATH tracks) to complete. I understand they can only work on this half when the PATH trains are shut down, but if they continue to build up the other half of the pool, how are they eventually going to reach the east side??? Won't it put the red crawler crane too far out of reach?

Anyone know how they will install the steel over the PATH tracks? And, also, WHEN will the steel over the tracks be installed?
they just install another crane on other side ( or move current one after his done with his job) This also why PATH train will be shut down in summer months ( weekend only)
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Old February 26th, 2009, 09:10 PM   #7673
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Quote:
Originally Posted by webeagle12 View Post
they just install another crane on other side ( or move current one after his done with his job) This also why PATH train will be shut down in summer months ( weekend only)
Thanks, that makes sense. So they won't start installing the steel over the PATH tracks until summer? I'd like to see the steel for the majority of the memorial in place by the next anniversary, and it certainly looks like they'll be able to achieve that. It'll be so nice to see the outlines of the two towers and literally half of the site in place (at least structurally)... plus it should silence those who complain that nothing has been built once and for all.
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Old February 26th, 2009, 09:21 PM   #7674
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try #2: looks like they finally start pumping concrete to fulton st again( at least concrete trucks this time are there )

Last edited by webeagle12; February 26th, 2009 at 10:03 PM.
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Old February 26th, 2009, 09:36 PM   #7675
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which one is fulton street?
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Old February 26th, 2009, 09:51 PM   #7676
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Quote:
Originally Posted by Uaarkson View Post
which one is fulton street?
south side of a freedom tower
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Old February 27th, 2009, 07:54 AM   #7677
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Quote:
Originally Posted by adam-albany View Post
That's just the concrete core. The building's footprint will be much larger:
Cheers Adam-Albany

That's cleared that up for me...I must admit that I did go back through the thread trying to work it out but there's like 150 plus pages....!!!

Thanks again.
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Old February 27th, 2009, 11:43 AM   #7678
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A few shots from valentine's day.










- A
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Old February 27th, 2009, 06:59 PM   #7679
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From two days ago..
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Old February 27th, 2009, 07:10 PM   #7680
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rebuildgroundzero.org Cam

rebuildgroundzero

CAM up and running after 5 day hiatus


http://www.rebuildgroundzero.org/mod...am/rgz_000.jpg



Fulton street deck continues to be a stepped up work in progress

It is likely we will see tower cranes installed soon at the T4 site. Thanks to the RGB cam
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