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Old March 19th, 2010, 08:57 AM   #13481
Spartan_X
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Why is the new steel a different colour ?
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Old March 19th, 2010, 02:46 PM   #13482
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Quote:
Originally Posted by percy07 View Post
Will the core start rising above the steel now? Or, will the core and steel be constructed successively, one floor at a time rather?

Just interested to know, seeing as London Bridge Tower's core shot up 20 floors and then the steelwork was erected...
Different construction methods and different scheduling.

1WTC initially sounded (from the outside) like it would be core-first, with everything apparently waiting for the core that was over the path tracks, which was very tricky / slow to start. Then the steel just went up without the core anyway, and the core stopped to wait for the steel to go ahead. It will proceed from here with steel first and core following - so the latest wait on the core kind of makes sense to allow the steel to get up to the standard floors where everything can then get into a nice rhythm.

They are on the standard (although they change shape as they go up) floors now, and the steel looks to be going up two floors at a time. LBT is doing that too - it's probably the optimal point in terms of how much gets done at once, and convenient size of steel to lift and work with.


At LBT, some steel actually went up first while the base of the core and the slipform rig got started. Then the core went up and the steel is now following as soon as the core was cured to attach to. The core is now stopped (upwards) to let the steel catch up but also to build the core and basements downwards. So everything (concrete and steel) is still proceeding at once but in different areas. The whole core that we see at LBT is sitting on steel columns set into the piles, while they dig out the basement and build the lower levels of the core, above/around the underground train lines that I believe are down there. All that is now happening out of our sight, where we saw it happen in the open as the first stage with 1WTC. I don't know if the LBT core could have gone up to full height without the basement levels being completed - quite possibly not.
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Old March 19th, 2010, 03:44 PM   #13483
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Quote:
Originally Posted by NewYorker2009 View Post
Great News Folks! The answers from www.wtcprogress.com regarding One World Trade Center are now on there. [...] So feel free to examine some of the questions and answers.
Well it just seems, to me, to add to the confusion on the "floor 20" thing.

Now we can see the standard floors going up, scaling crudely from posted photos it looks like about 12 standard floors equivalent in the base - about 15ft per floor which roughly fits with overall height/floors. 20 floors might add up right if you started counting from the bottom of the basement - I thought that they might be doing that for some reason.

According to these answers though, it's based on the 200ft above ground and a typical 10ft floor height. That just doesn't make sense looking at the actual standard floors in the photos. It would also be extremely agressive (maybe impossible) in a skyscraper.

I don't believe 10ft can be the floor height in this building, equally I don't understand how a program director for the building doesn't know or can't find out (for a public response) the real floor height. Makes no sense to me.
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Old March 19th, 2010, 03:44 PM   #13484
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The construction photos of this building give me the impression of solidity and permanence - as if the form is saying, "this building will still be standing here come doomsday!"

LBT's construction, on the other hand, evokes a somewhat more delicate "leaping for the sky with poise" image.

Given the setting of each, and the symbolic role this building occupies as part of the 9/11 legacy, I think these differences make perfect sense.

I'm finding both buildings fascinating.
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Old March 19th, 2010, 04:51 PM   #13485
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Quote:
Originally Posted by Spartan_X View Post
Why is the new steel a different colour ?
Different types of fireproofing. The lower levels use a red fireproof paint that foams up when heated. The upper floors will have standard spray-on fireproofing which is applied after the steel is erected.
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Old March 19th, 2010, 05:14 PM   #13486
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What is the height of the building without the spire? I heard something around the 1300 foot range.
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Old March 19th, 2010, 08:54 PM   #13487
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Wikipedia says the roof height is 417m (1370ft)
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Old March 19th, 2010, 09:04 PM   #13488
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Quote:
Originally Posted by uakoops View Post
Different types of fireproofing. The lower levels use a red fireproof paint that foams up when heated. The upper floors will have standard spray-on fireproofing which is applied after the steel is erected.
Will the lower floors have more fire protection then the higher floors?
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Old March 19th, 2010, 10:59 PM   #13489
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03/18

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by Fernando Maclen on Flickr.
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Old March 19th, 2010, 11:28 PM   #13490
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Yankees 1#


Does anyone know what they placed over this one part on 1WTC?


Last edited by Draegen; March 20th, 2010 at 12:42 AM.
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Old March 20th, 2010, 01:23 AM   #13491
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Quote:
Originally Posted by rda View Post
Well it just seems, to me, to add to the confusion on the "floor 20" thing.

Now we can see the standard floors going up, scaling crudely from posted photos it looks like about 12 standard floors equivalent in the base - about 15ft per floor which roughly fits with overall height/floors. 20 floors might add up right if you started counting from the bottom of the basement - I thought that they might be doing that for some reason.

According to these answers though, it's based on the 200ft above ground and a typical 10ft floor height. That just doesn't make sense looking at the actual standard floors in the photos. It would also be extremely agressive (maybe impossible) in a skyscraper.

I don't believe 10ft can be the floor height in this building, equally I don't understand how a program director for the building doesn't know or can't find out (for a public response) the real floor height. Makes no sense to me.
The office floor height is 13 feet 4 inches.
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Old March 20th, 2010, 02:37 AM   #13492
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Quote:
Originally Posted by Blue Flame View Post
What is the height of the building without the spire? I heard something around the 1300 foot range.
It'll be 1,368 feet to the top of the parapet, same hight as the First Tower One's roof.

Quote:
Originally Posted by Agent Vengence View Post
Wikipedia says the roof height is 417m (1370ft)
Wikipedia is wrong, there's a shock . The roof hight is 1,334' 8".

Quote:
Originally Posted by Draegen View Post
Will the lower floors have more fire protection then the higher floors?
No, the entire building well have the same, high standard, of fire protection.

Great pics Momo1435 !

Last edited by Zensteeldude; March 20th, 2010 at 02:42 AM.
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Old March 20th, 2010, 02:45 AM   #13493
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March 19th, 2010

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Old March 20th, 2010, 03:35 AM   #13494
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"Best Steel Porn Pic" of the month !!!!!!!
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Old March 20th, 2010, 05:05 AM   #13495
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Quote:
Originally Posted by Draegen View Post
Yankees 1#


Does anyone know what they placed over this one part on 1WTC?

Could you narrow it down a bit, that pic covers most of the WTC site.
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Old March 20th, 2010, 06:41 AM   #13496
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Quote:
Originally Posted by Zensteeldude View Post
Could you narrow it down a bit, that pic covers most of the WTC site.
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Old March 20th, 2010, 02:29 PM   #13497
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Those are just the new floorplates.... All the floors beneath it have had the same.
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Old March 20th, 2010, 08:32 PM   #13498
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Those are just the new floorplates.... All the floors beneath it have had the same.
Oh i didn't know this is the first floor iv watched being built
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Old March 20th, 2010, 11:18 PM   #13499
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That's amazing progress. I had no idea it was this far along.

As I understand it, most of the area shown in this photo will be greenspace surrounding the two huge fountains in the original towers' footprints. This will be nice.






Last edited by RobertWalpole; March 20th, 2010 at 11:38 PM.
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Old March 21st, 2010, 10:16 AM   #13500
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I was at the trade center yesterday and all i can say is wow what beams they are using at 1 WTC. so so so thick, i was amazed u know. I left the D line at chambers street and approached GZ from the WTC7 Plaza and the small and fragile looking structure on pictures came out as a big big "tower " already. Am keen to see it finished and than come back.
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