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Old February 12th, 2009, 07:26 PM   #7541
webeagle12
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gd bc of high winds today almost all work is stopped
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Old February 12th, 2009, 07:45 PM   #7542
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Quote:
Originally Posted by ZZ-II View Post
image hosted on flickr
This looks somewhat frightening, with the steel on the left floating in space.... how much higher can the steel rise before the north core rises?
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Old February 12th, 2009, 07:56 PM   #7543
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WTC Update:
Quote:
Steel on 1 WTC, the Freedom Tower, is now over 100ft high. To see the progress, visit www.wtcprogress.com.
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Old February 12th, 2009, 08:12 PM   #7544
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Quote:
Originally Posted by Carlo[NL] View Post
WTC Update:
105 feet to be exact.
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Old February 12th, 2009, 08:34 PM   #7545
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96' 3" to be exact. That site is just rounding up.


Oh wait, they are going from street level to the top, not the ground floor, and they're still off about 4 feet. Oh well, what's 4 feet on a 1,368 foot tower.

Last edited by Zensteeldude; February 12th, 2009 at 08:38 PM. Reason: fact checking
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Old February 12th, 2009, 08:44 PM   #7546
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Now, pic 2 and 3 are something to get worked up about, north core progress !

http://www.panynj.gov/wtcprogress/index.html
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Old February 12th, 2009, 09:15 PM   #7547
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great to read that the north core will finally rise soon
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Old February 12th, 2009, 09:46 PM   #7548
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Taken from http://www.wtcprogress.com:
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Old February 12th, 2009, 10:55 PM   #7549
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That proves that both cranes need to be erected soon.
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Old February 12th, 2009, 11:07 PM   #7550
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they keep talkin about this upcoming pour but I wanna know the date!
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Old February 12th, 2009, 11:18 PM   #7551
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Quote:
Originally Posted by Zensteeldude View Post
96' 3" to be exact. That site is just rounding up.


Oh wait, they are going from street level to the top, not the ground floor, and they're still off about 4 feet. Oh well, what's 4 feet on a 1,368 foot tower.
Zen, maybe they're adding 9 feet to the 196 feet by including the short pieces of steel sticking up above the horizontal beams at the very top. Who knows. They're probably just eager to show off the height after all those ridiculous MSNBC freedom tower bashing segments the week before last.

BTW, Zen, do you know why the steel beams and columns now being put into place within the concrete of the core only started at the street level? Why didn't they start doing this at the beginning, at bedrock level? If they're meant to make the core stronger against car bombs, it makes little sense as there's no protection from threats entering, for instance, in the loading docks below ground or even by the PATH trains running through the building. Also, it seems like the columns would have a better footing if they were set into the bedrock. What gives?
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Old February 12th, 2009, 11:45 PM   #7552
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They have a lot of work to do, but wow, this is getting exciting!
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Old February 12th, 2009, 11:53 PM   #7553
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Quote:
Originally Posted by RKOwens View Post
Zen, maybe they're adding 9 feet to the 196 feet by including the short pieces of steel sticking up above the horizontal beams at the very top. Who knows. They're probably just eager to show off the height after all those ridiculous MSNBC freedom tower bashing segments the week before last.

BTW, Zen, do you know why the steel beams and columns now being put into place within the concrete of the core only started at the street level? Why didn't they start doing this at the beginning, at bedrock level? If they're meant to make the core stronger against car bombs, it makes little sense as there's no protection from threats entering, for instance, in the loading docks below ground or even by the PATH trains running through the building. Also, it seems like the columns would have a better footing if they were set into the bedrock. What gives?
The base doesn't need more compression strength and whatever passes for the "ground" around the base of the building will probably brace it laterally, so there's no purpose for steel below ground level.
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Old February 13th, 2009, 01:12 AM   #7554
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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.

Last edited by Zensteeldude; February 13th, 2009 at 01:38 AM. Reason: added thoughts
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Old February 13th, 2009, 01:46 AM   #7555
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http://www.wcbs880.com/pages/3838915...d=937456#imgXR
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Old February 13th, 2009, 03:12 AM   #7556
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This is great the updates are outstanding. This going alot faster, then I could ever hope for.
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Old February 13th, 2009, 10:28 AM   #7557
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Quote:
Originally Posted by lakegz View Post
they keep talkin about this upcoming pour but I wanna know the date!
I think the Port Authority's learned better than to give exact dates when they don't have to.
Quote:
Originally Posted by ramvid01 View Post
Fantastic shots! It's an angle we don't get to see usually, too. The lighting really highlights the steel framework above grade.
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Old February 13th, 2009, 02:44 PM   #7558
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Thanks for the diagram Zensteeldude.
Apparently, they don't intend for the floor beams to pull away from the core in case of problem like the previous structures had. Not to mention the core itself being so much stronger than before.
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Old February 13th, 2009, 08:02 PM   #7559
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Great updates indeed
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Old February 13th, 2009, 11:26 PM   #7560
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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).
Do you know when the perimeter columns will start going up? The PA report in October said steel would begin in late 2009, but we're already seeing huge amounts of steel going up in the core. Does this indicate that they may also begin raising the height of the perimeter columns soon in order to keep pace (and allow for floor beams atop the lobby to be installed)?
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