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Old March 4th, 2010, 10:28 AM   #13241
MontanaGuy
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mclancer wrote:
Quote:
I'm thinking as I'm looking at the pictures...
Don't you think they over built this thing?
I remember reading somewhere that the base of this building was going to be constructed in such a way that it could withstand an explosion from a truck bomb. I'm sure they're taking every precaution they can because it's such a high profile location.
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Old March 4th, 2010, 12:50 PM   #13242
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Quote:
Originally Posted by RKOwens44 View Post
That's because it's been the middle of winter the past few months and they can't pour concrete unless the temperature is above 32 degrees F,
Been below that a lot of this year in London and yet the Shard core has gone up 20 stories - seem to be pouring 24hrs and the nights are definitely freezing.

Maybe some other reason (london uses slave labour ?).
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Old March 4th, 2010, 08:44 PM   #13243
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Been below that a lot of this year in London and yet the Shard core has gone up 20 stories - seem to be pouring 24hrs and the nights are definitely freezing.

Maybe some other reason (london uses slave labour ?).
There is a technique in which chemicals are added to the concrete mixture which allows for the concrete to harden even during freezing temperatures, but the downside to this technique is that it makes the concrete less strong and therefore its use is prohibited in the construction of 1WTC.

Actually though, another technique which they used on 1WTC to pour the concrete core all throughout the previous winter was that they wrapped these huge, heated "blankets" around the entire section of the core that was being poured. But I haven't seen them use these at all this past winter. So, I dunno why the core didn't rise higher throughout this past winter.
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Old March 4th, 2010, 09:53 PM   #13244
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Quote:
Originally Posted by rda View Post
Been below that a lot of this year in London and yet the Shard core has gone up 20 stories - seem to be pouring 24hrs and the nights are definitely freezing.

Maybe some other reason (london uses slave labour ?).
It's two completely different methods of construction by the same structural engineering firm. Guess which one is going to be stronger? The one with a completely concrete core or the one with a concrete core completely integrated with the core steel?

Obviously both towers are being built to the highest standards, so why do Shard people insist on coming in here and talking garbage? I have nothing for praise for the Shard when I visit the thread.
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Old March 4th, 2010, 11:09 PM   #13245
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First visit to this thread for a month or so...

I'll check back in another month to play my monthly game of spot-the-difference.
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Old March 5th, 2010, 12:49 AM   #13246
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Work stopped on the core to allow the steel to get far enough ahead so that both the steel and the core could rise uninterrupted.

As stated, work on the core has resumed and should be continuous from here on.

It turns out that the very strong concrete being used generates more than enough heat while curing to prevent freezing even in temps as low as 20 degrees F. Insulation is usually enough. In the heat of summer icing the mix and chiller blankets may be needed.
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Old March 5th, 2010, 01:46 AM   #13247
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Quote:
Originally Posted by MontanaGuy View Post
mclancer wrote:

I remember reading somewhere that the base of this building was going to be constructed in such a way that it could withstand an explosion from a truck bomb. I'm sure they're taking every precaution they can because it's such a high profile location.
You are correct, the lobby well be protected by blast walls and the structure is redundant. This is probably the safest tower ever designed.
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Old March 5th, 2010, 03:28 AM   #13248
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Quote:
Originally Posted by Zensteeldude View Post
You are correct, the lobby well be protected by blast walls and the structure is redundant. This is probably the safest tower ever designed.
I like hearing how it's the safest building...but alas the Titanic was also "unsinkable."
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Old March 5th, 2010, 03:45 AM   #13249
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The Titanic was a ship, and a flawed ship at that. There is considerable question as to the quality of the material used in her construction.

Nothing is "unsinkable" but some things are more unsinkable than others.

Nothing is indestructible, but some things are safer than others.

http://www.youtube.com/watch?v=9za5xzGKxNo

Last edited by Zensteeldude; March 5th, 2010 at 03:59 AM.
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Old March 5th, 2010, 03:47 AM   #13250
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Picture by Joe Woolhead on wtc.com. 3-3-10.

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Old March 5th, 2010, 06:10 PM   #13251
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looks like east crawler crane will be moved this weekend
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Old March 5th, 2010, 08:45 PM   #13252
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Looks like they are removing the big white tent from the North pool that has been there forever! Oh well, it was just for holding equipment used during concrete pours, and now that almost all of the concrete has been poured for the memorial and museum (at least, within a few hundred feet of the North pool), I guess they don't need it anymore.

I wouldn't be surprised if we see it pop up inside the South pool shortly, where there is still a lot of concrete pouring necessary.
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Old March 5th, 2010, 09:49 PM   #13253
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Core thingy jump! Southwest corner.
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Old March 6th, 2010, 01:23 AM   #13254
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Core thingy jump! Southwest corner.
Yup, the scaffolding moved up. Hopefully we'll see some core steel this weekend. And maybe a crane jump.
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Old March 6th, 2010, 07:34 AM   #13255
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they should leave it in red like golden gate
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Old March 6th, 2010, 10:28 PM   #13256
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West Street (southbound) has been realigned (new pavement near 1WTC), so that must be good!
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Old March 7th, 2010, 12:59 AM   #13257
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no new steel for the core yet? why it's taking so long?
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Old March 7th, 2010, 06:44 AM   #13258
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Quote:
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they should leave it in red like golden gate
It well all be encased in sheet metal column covers.
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Old March 7th, 2010, 07:22 AM   #13259
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Quote:
Originally Posted by spectre000 View Post
Picture by Joe Woolhead on wtc.com. 3-3-10.

I am neither architect nor engineer, but in my non-expert view, I guess the metal (red color) are small and perhaps are not strong enough for the weight and height of this building in case of earthquake or alike.


Thx.
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Old March 7th, 2010, 07:31 AM   #13260
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Quote:
Originally Posted by @Flores View Post
I am neither architect nor engineer, but in my non-expert view, I guess the metal (red color) are small and perhaps are not strong enough for the weight and height of this building in case of earthquake or alike.


Thx.
We'll be sure to let the engineers know about your non-expertise, then.
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