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Old August 25th, 2011, 07:50 PM   #25621
jhalsey
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Wow! It's fantastic all of a sudden and outshining all the towers around it.
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Old August 25th, 2011, 08:46 PM   #25622
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Hurricane Irene storm surge map coutesy of WNYC:

image hosted on flickr


As you can see, the potential inundation at WTC is serious.
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Old August 25th, 2011, 08:51 PM   #25623
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Only the orange area is going to be possibly flooded. The rest requires a direct hit by a Category 2 or higher hurricane which is unlikely.

Still I hope they secure the construction sites well. Dont' want to see damage from flying objects or people hurt. It would suck if cladding gets messed up.
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Old August 25th, 2011, 09:04 PM   #25624
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I cant wait to see this special tonight!!! I'll bet not a single member will be logged on this thread tonight; they'll be too busy with thier eyes glued to the t.v. ...I know I will
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Old August 25th, 2011, 09:22 PM   #25625
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Quote:
Originally Posted by Dominance View Post
My question is on One World Trade Center is what is it max threshold aka strength?

What is the highest earthquake level could it survive from 1.0 to 10.0?
What is the highest Tornado it can survive from a EF 1 to an EF5?
what is the higest Hurricane it can survive from CAT 1 to CAT 5?
last but not least can One World Trade Center survive the big 1000 foot plus tusnami that the discovery channel predicits for NYC?

What is the max this Power house of a building can withstand?
The entire spandrel framing system of WTC 1 are progressive collapse resisting moment frames. The members of which are much bigger than you would see in a lateral moment frame because they have to resist the very large forces that would occur if you lost a column at any given location. They aren't flexible connections though, so i doubt they would preform well in a 10.0 earthquake. That is a much bigger quake than you would ever see on the east coast, short of the apocalypse though.

As for wind forces, that system would perform extremely well. WTC1 would more than likely survive a category 5 hurricane, as would most highrise buildings in NYC.

If I understand tornado ratings correctly, the EF is based on how much damage is caused. Therefore, an EF-1 in the middle of Kansas could be an EF-3 if it went through New Jersey. Either way, a strong tornado would likely blow out the facade, but it wouldn't topple the tower.

As for the tsunami, go watch Deep Impact. Nothing survives this side of the Appalachians.

I did some research on the Force Protection design of WTC1 for a presentation and without getting into specifics of the design, the only thing I see bringing this baby down is an asteroid. They really did a good job with this one.
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Old August 25th, 2011, 09:27 PM   #25626
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Great update!
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Old August 25th, 2011, 09:33 PM   #25627
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soooo half of the WTC site can potentially be flooded this weekend.
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Old August 25th, 2011, 09:54 PM   #25628
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yes this tower is supposed to withstand the possibility of another attack the twin towers hadn't a central core b/c at the time the port authority wanted to maximize office space, so they used strong steel around the towers to even out the weight. (keep in mind there were only two instead of six). When the towers fell, the jet fuel melted the outer columns thus the towers collapsed into themselves (Also keep in mind the core was made of ~sheerock~, and although they were designed to withstand the impact of a plane, they were not designed to deal with Jet Fuel). I guess people in the 70's thought that planes just flew by themselves? Ignorance is the worlds curse. In any event, The Freedom tower is designed todeal with all of these possibilities and from what I hear, they have some sort of a ventilation system? correct me if I'm wrong.
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Old August 25th, 2011, 10:00 PM   #25629
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I dont think there's anything to worry about.
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Old August 25th, 2011, 10:04 PM   #25630
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Quote:
Originally Posted by AntneyAudacious View Post
yes this tower is supposed to withstand the possibility of another attack the twin towers hadn't a central core b/c at the time the port authority wanted to maximize office space, so they used strong steel around the towers to even out the weight. (keep in mind there were only two instead of six). When the towers fell, the jet fuel melted the outer columns thus the towers collapsed into themselves (Also keep in mind the core was made of ~sheerock~, and although they were designed to withstand the impact of a plane, they were not designed to deal with Jet Fuel). I guess people in the 70's thought that planes just flew by themselves? Ignorance is the worlds curse. In any event, The Freedom tower is designed todeal with all of these possibilities and from what I hear, they have some sort of a ventilation system? correct me if I'm wrong.
Sounds like this one would stand up pretty well in such an event then, it's what I assumed but I don't know enough about architecture to be sure, although I was pretty sure they had taken this into account when designing the new building. It would have been pretty ignorant not to have.

Yeh I read about the ventilation system, i'm pretty sure it was in the article i linked to on the discovery page website.
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Old August 25th, 2011, 10:08 PM   #25631
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August 24

image hosted on flickr

By DigitalGlobe-Imagery
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Old August 25th, 2011, 10:56 PM   #25632
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Quote:
Originally Posted by abuabu View Post
soooo half of the WTC site can potentially be flooded this weekend.
Weather models I have seen have been predicting up to a 15ft storm surge. The wind should not be a huge issue. However, NOAA reports say flooding could be expected up to Canal Street. Being, from Alabama, I have no idea where that is.

I bet this hurricane does end up causing delays on the site.
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Old August 25th, 2011, 11:06 PM   #25633
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Since I'm from Europe I guess I'll have to wait for the documentary to air here

Btw, I wonder how the pools would look like if the WTC site would get flooded
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Old August 25th, 2011, 11:06 PM   #25634
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Quote:
Originally Posted by Keepon View Post
August 24

image hosted on flickr

By DigitalGlobe-Imagery
Tower 1 looks so great in that picture (except for the flag).

What's with the different shades of orange on the WFC? Is it being painted?

I hope Tower 1 doesn't suffer from the hurricane.
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Old August 25th, 2011, 11:13 PM   #25635
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Quote:
Originally Posted by IanG View Post
Tower 1 looks so great in that picture (except for the flag).

What's with the different shades of orange on the WFC? Is it being painted?

I hope Tower 1 doesn't suffer from the hurricane.
I think they are applying a waterproof layer to the roofs...
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Old August 25th, 2011, 11:17 PM   #25636
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Bloomberg mentioned: if needed, they would evacuate BPC and other low laying areas of the city. Meanwhile, jerseys mayor declared state of emegency and is preparing for the worst.

http://cityroom.blogs.nytimes.com/20.../?ref=nyregion
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Old August 25th, 2011, 11:18 PM   #25637
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Quote:
Originally Posted by Keepon View Post
August 24

image hosted on flickr

By DigitalGlobe-Imagery
I think this is an old picture and not taken on the 24th 'coz i don't see grass near the vents.
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Old August 25th, 2011, 11:51 PM   #25638
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Quote:
Originally Posted by gcashwell View Post
Weather models I have seen have been predicting up to a 15ft storm surge. The wind should not be a huge issue. However, NOAA reports say flooding could be expected up to Canal Street. Being, from Alabama, I have no idea where that is.

I bet this hurricane does end up causing delays on the site.
If in fact we do get flooding up to canal street, that will be a large area of downtown flooded. Let's hope they are wrong with the forecast
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Old August 25th, 2011, 11:54 PM   #25639
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Quote:
Originally Posted by AntneyAudacious View Post
yes this tower is supposed to withstand the possibility of another attack the twin towers hadn't a central core b/c at the time the port authority wanted to maximize office space, so they used strong steel around the towers to even out the weight. (keep in mind there were only two instead of six). When the towers fell, the jet fuel melted the outer columns thus the towers collapsed into themselves (Also keep in mind the core was made of ~sheerock~, and although they were designed to withstand the impact of a plane, they were not designed to deal with Jet Fuel). I guess people in the 70's thought that planes just flew by themselves? Ignorance is the worlds curse. In any event, The Freedom tower is designed todeal with all of these possibilities and from what I hear, they have some sort of a ventilation system? correct me if I'm wrong.
Yeah but if they used strong steel it should have survived the jet fuel. Jet fuel is about 2000 degrees, and strong high grade steel can withstand 4000 degrees. Maybe they took short cuts on the first WTC ?
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Old August 26th, 2011, 12:08 AM   #25640
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there is a big difference between melting point and loss of structural integrity.

not to mention that WTC floors were made up largely of bar joists with some W shape headers mixed in. Bar joists are effectively useless against lateral forces.
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