NEW YORK | World Trade Center Memorial & Transit Hub

[JRinSoCal]

Looking great so far! Can someone post a rendering of what the completed product will look like please?

[The Grand Architect]

Originally Posted by JRinSoCal

Looking great so far! Can someone post a rendering of what the completed product will look like please?

Gladly. Here's a couple of mine:

[toymatz121]

Originally Posted by JSsocal

^^The plywood isn't the floor, it is simply a form for the concrete to be poured onto, at which point the wood will be removed. Since the underground columns in the east bathtub are not steel, there is no place for steel floor plates to be bolted onto as there was in the west bathtub. This just has to do with the fact that the west bathtub has large open spaces underground and a lot less to support, (a plaza as opposed to a tower), so steel made more sense. Here it's just reinforced, poured concrete throughout.

Thanks for that detailed clarification, Sir.

[animatedmartian]

The pools look perfect with a little bit of rain water in them.






http://evsdatacenter.netfirms.com/kpitv/silver.htm

[xnyr]

^^ Pardon my ignorance and the length of this post. But I'm glad this question came up because it's been nagging me...

In my experience, all office highrises were completely steel construction, while residential construction were completely reinforced concrete columns and post tensioned concrete slabs.

What I'm seeing in the east bathtub the WTC (and possibly other sites) is a mashup up of steel columns supporting concrete slabs.

So,

A. I don't understand why commercial bldgs are steel skeletons vs. reinforced concrete for residential.

B. Why are concrete slabs (for basement levels) here chosen over steel & concrete. Is one method cheaper than the other? I'm assuming there will be an underground loading docks/garages/driveways for commercial deliveries between the bldgs.

C. I'm seeing MAJOR concrete walls in the basement of 3 WTC - what's that about? Will it have a concrete core like 1WTC?

Basically when is one method chosen over the others? I appreciate any clarification of these questions..

[Roadcruiser1]

1) Steel is much stronger then concrete, and if a steel beam is provided with strong fireproofing like concrete the beam can withstand heavy fires. Also you can use steel beams to build taller structures.

2) I am assuming that concrete is much stronger, and would provide much more support for the basement floors. People can correct me if I am wrong.

3) 3 WTC will use a concrete core.

[animatedmartian]

I remember reading about it in a One57 thread since that tower is all concrete residential supertall. I think it was that a concrete tower is heavier so there's less swaying which would obviously be more noticeable inside a residential tower.

Now that I think about it,

Oh hay look what I found:

http://forum.skyscraperpage.com/showthread.php?t=122219

[Roadcruiser1]

Well that is possible. The Empire State Building is an example of a building that composes mostly of reinforced concrete and steel along with it's tough limestone exterior. The building sways less then 2 inches in a 50 MPH wind. However the original World Trade Center Twin Towers swayed noticeably in a strong breeze, and that was due to the steel, and the drywall which is much lighter then the concrete and limestone on the Empire State Building.

[xnyr]

Originally Posted by Roadcruiser1

Well that is possible. The Empire State Building is an example of a building that composes mostly of reinforced concrete and steel along with it's tough limestone exterior. The building sways less then 2 inches in a 50 MPH wind. However the original World Trade Center Twin Towers swayed noticeably in a strong breeze, and that was due to the steel, and the drywall which is much lighter then the concrete and limestone on the Empire State Building.

Sorry for getting OT...but, I don't think the limestone plays a role in building sway; it is merely a decorative skin and wouldn't strengthen the building; if anything, the limestone would break off if swaying was in issue in the ESB. I think it is more due to the the tapering mass of the ESB.

[jd3189]

Hey guys. This is my first post to this thread. It seems that 1WTC isn't and never was the greatest thing about the new World Trade Center. This memorial is beautiful.

[STR]

Originally Posted by xnyr

Sorry for getting OT...but, I don't think the limestone plays a role in building sway; it is merely a decorative skin and wouldn't strengthen the building; if anything, the limestone would break off if swaying was in issue in the ESB. I think it is more due to the the tapering mass of the ESB.

There's probably a dampening effect from the shear amount of masonry (columns are sheathed in brick, plus 1-2 layers of brick, THEN the limestone panels), but you're right in that it's still a curtain wall. It will, however, flex with the rest of the building without cracking. The main reason why the ESB is so stiff (roughly 1/2 to 1/3 of the sway of a modern building) is because it's so completely overbuilt. It uses something like twice the steel of a modern design. Steel was cheap, so was the labor used to put it up. Most of all, there were no computers to refine the design into something more economical.

There really isn't much concrete in the ESB (relatively speaking) compared to something like One57, or even 4 World Trade Center. It's a steel frame building, through and through. Then again, so is the memorial here. Actually, the basic framing system is quite similar between the ESB and the memorial, both being multiple span frames based on a roughly 30 foot column spacing. The scale of the columns, as well as the finishing materials (again, brick vs spray on insulation or concrete), are naturally different.

[wong21fr]

The last of the "ribs" for the PATH terminal is ready to be put in place.

[animatedmartian]

Originally Posted by wong21fr

The last of the "ribs" for the PATH terminal is ready to be put in place.

http://evsdatacenter.netfirms.com/kpitv/silver.htm

Also, from WTC's Twitter...
https://twitter.com/#!/WTCProgress

http://t.co/BEEj7i9


http://t.co/8e2RsAF


http://t.co/PMvd6FC


http://t.co/kC7KNGN

[xnyr]

^ Extraordinary detail shots... You definitely can't get that feeling of looking over someone's shoulder from the webcams.

Thanks for posting!

[animatedmartian]

The cams definitely don't give you a sense of scale either. This is 16 acres of space being built from inside out but the cams make it seem like 5.

From WTC.com


http://www.wtc.com/media/images/s/wt...memorial?sid=1

http://www.wtc.com/media/images/d/14...e-Woolhead.jpg

[animatedmartian]

Double posted so the text isn't stretched.

http://www.wtc.com/news/visitors-gui...ower-manhattan

Visitor's guide to 9/11 sites and Lower Manhattan
By Leanne Italie | August 11, 2011
Associated Press

Out of the ashes of 9/11 has risen a vibrant neighborhood packed with new restaurants and hotels, places to live and spots to shop, along with many ways to pay respects to an area some worried would never come back.

A decade after the attack on the World Trade Center, Lower Manhattan draws roughly 9 million of the city's nearly 50 million visitors a year, including the area around ground zero.
The neighborhood now has 18 hotels with more than 4,000 rooms, up from six hotels and 2,300 rooms on Sept. 11, 2001. For many tourists, it's a must-see, right up there with Times Square and the Statue of Liberty.

....

Access to the site can be confusing as construction continues. Many subway stops, including those at Chambers and Fulton streets, will bring you nearby. Timed tickets (free but required) can be reserved up to six months in advance at http://www.911memorial.org . About 250,000 passes have already been reserved. Print your tickets beforehand if you can. Enter at the northeast corner of Albany and Greenwich streets for check-in no more than 30 minutes ahead of your reservation.

Through Jan. 8, the memorial is open 10 a.m. to last entry at 7 p.m. weekdays; 9 a.m. to 7 p.m. weekends; last entry at 5 p.m. Jan. 9-March 10. No restrooms will be available on site until the museum opens in September 2012. The World Financial Center's glass-enclosed Winter Garden has public restrooms and there are some on the second floor of the Burger King on Liberty Street at Church.

...

[Otie]

Carolyn Cole / Los Angeles Times




"Minimalist lighting with monitoring cameras are a part of the design for the National September 11 memorial."


"The names of those killed at the World Trade Center are cut into the edge of the "Reflecting Absence" memorial."

[Otie]

Aberdeen Mayor Visits NYC 9/11 Memorial

...As the leaves change in the fall, the Swamp White Oak ranges from amber to golden brown and even sometimes pink. The trees can grow as tall as 60 feet, and designers hope that the trees will eventually form a canopy over the plaza. The trees will never be identical because of their different growth rates, serving as a physical reminder of living individuals...

Photos found on the same article, by Fred Tagliarini



Remains of one of the original staircase of the World Trade Center, often referred to as the Survivors' Stairs. This will be located in the Memorial Museum




Bill Baroni in the lowest level of the 9/11 museum which is the original foundation of Ground Zero

[animatedmartian]

2011-08-12 013 by in.formed, on Flickr

Notice the check-in plaza is almost paved.

[Otie]

PANYNJ on Twitter