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Supertalls Discussions of projects under construction between 300-599m/1,000-1,999ft tall.
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Old September 26th, 2014, 05:45 PM   #4661
thejacko5
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yes.

I would expect the concrete crane to come earlier.

Once the crawler becomes useless they will switch to the tower. Same thought process as 30 Park.

A tower crane, especially in new york city is extremely costly when compared to a conventional crawler. Its always the objective to use it for the shortest period possible, when possible.
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Old September 26th, 2014, 07:47 PM   #4662
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Quote:
Originally Posted by thejacko5 View Post
A tower crane, especially in new york city is extremely costly when compared to a conventional crawler. Its always the objective to use it for the shortest period possible, when possible.
Why are tower cranes so much more expensive in NYC? In most places they are actually cheaper to operate because they are so much more efficient!
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Old September 26th, 2014, 08:08 PM   #4663
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As i understood till now, core is the toughest element of building. It also supports and bears whole building. Regarding this, i really don't understand how core can be built without steel. Maybe i didn't understood what you meant in your posts, did you mean that core will be built without steel at all, only with concrete? This would be impossible, because concrete it self doesn't have any supporting capability. Maybe the core in this case will be built different than in case of it's previous neighbours, but without steel at all, i don't think it's possible.
Core + steel rebar goes first. then steel beams like

This project RIC Chicago
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Old September 27th, 2014, 03:21 AM   #4664
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Why are tower cranes so much more expensive in NYC? In most places they are actually cheaper to operate because they are so much more efficient!
massive engineering and permitting process, trucking, inspections, weekend assemblies, weekend jumps, street closures, mta and dot analysis, high scrutiny, climbing time for operators, and on and on...

to get a tower crane approved and operational you should figure 300-400,000, not including getting the cranes registration with the DOB (CD), rental, fuel, tax, operation or removal.
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Old September 27th, 2014, 06:07 AM   #4665
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Quote:
Originally Posted by thejacko5 View Post
massive engineering and permitting process, trucking, inspections, weekend assemblies, weekend jumps, street closures, mta and dot analysis, high scrutiny, climbing time for operators, and on and on...

to get a tower crane approved and operational you should figure 300-400,000, not including getting the cranes registration with the DOB (CD), rental, fuel, tax, operation or removal.
Of course, all of those items also go into the cost of using a tower crane in any other city yet in most places tower cranes are much cheaper to operate than lattice boom cranes like the one being used now. I guess the increased costs in NYC are due to the unions and the increased city requirements for them.
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Old September 27th, 2014, 06:58 PM   #4666
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Quote:
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Why are tower cranes so much more expensive in NYC? In most places they are actually cheaper to operate because they are so much more efficient!
Everything considering construction is more expencive in New York.For example, one supertall like 1 Wtc costs 4-5 billion, while in China or UAE one supertall like Burj Calipha costs only 1 billion. That is the reason why China and other parts of the world are so much fertile ground for supertalls. It's somekind of paradox: as one area is more developed, costs for developing this area rise, thus slowing and constraining further development...
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Old September 27th, 2014, 09:48 PM   #4667
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Quote:
Originally Posted by Ivan the Immigrant View Post
Everything considering construction is more expencive in New York.For example, one supertall like 1 Wtc costs 4-5 billion, while in China or UAE one supertall like Burj Calipha costs only 1 billion. That is the reason why China and other parts of the world are so much fertile ground for supertalls. It's somekind of paradox: as one area is more developed, costs for developing this area rise, thus slowing and constraining further development...
The comment wasn't about the actual cost because that's understandable. The comment was regarding the cost ratio between Tower Cranes and Conventional Lattice Cranes. In most places tower cranes are cheaper to operate but apparently in New York City they are more expensive. I was questioning what makes them more expensive in New York City than elsewhere.
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Old October 1st, 2014, 05:53 AM   #4668
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It's been a while since anybody posted on this page...
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Old October 1st, 2014, 06:57 AM   #4669
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Anyone know what's going on with access to Cortland? They opened it for a week, then built scaffolding to protect passageway, and then it's been closed ever since. Like what was the point?
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Old October 1st, 2014, 08:20 PM   #4670
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Correct me if I'm wrong, but I'm assuming the platforms going up around the core are so workers can reinstall the core forms?
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Old October 1st, 2014, 09:10 PM   #4671
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No, those are part of the automatic climbing form system. The rails on the platforms are so the forms themselves can slide while moving the platforms as a whole vertically.
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Old October 2nd, 2014, 12:05 AM   #4672
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I'm still confused, those wooden platforms don't look like they will be rising with the structure...
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Old October 2nd, 2014, 12:27 AM   #4673
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They are the worker platforms, which is part of climbing formwork... They are attached to the side of the core vs scaffolding, which was used before as temporary platforms.




That whole unit is automatically jumped, not just the forms.
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Old October 6th, 2014, 07:30 PM   #4674
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Looks like it's a done deal?

http://www.bondbuyer.com/news/region...1066751-1.html

N.Y. Liberty Development Corp. Approves WTC Bonds
BY ROBERT SLAVIN
OCT 6, 2014


The New York Liberty Development Corp. board Monday approved selling $1.78 billion in tax-exempt bonds to complete 3 World Trade Center
.
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Old October 6th, 2014, 08:02 PM   #4675
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I think so. 1.78Bn should be more than enough.
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Old October 6th, 2014, 08:08 PM   #4676
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HOORAH!

When should we be expecing the tower crane to come in btw? Wasn't it said to be towards the end of September?
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Old October 6th, 2014, 08:19 PM   #4677
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Quote:
Originally Posted by iamtheSTIG View Post
HOORAH!

When should we be expecing the tower crane to come in btw? Wasn't it said to be towards the end of September?
I dont think so.... Its going to be a while ( couple months plus..) before we see a tower crane. It is really not needed now that why they have crawler in place
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Old October 6th, 2014, 08:27 PM   #4678
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There was never a doubt in my mind about the approval. Good news indeed and this means imo, Silverstein can start focusing finding a tenant for 2 WTC.
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Old October 6th, 2014, 08:28 PM   #4679
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There was never a doubt in my mind about the approval. Good news indeed and this means imo, Silverstein can start focusing finding a tenant for 2 WTC.
The true jewel of the complex. Good news.
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Old October 6th, 2014, 09:42 PM   #4680
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So how are things doing there atm? any news?
Also wanted to thanks everyone who post pictures and news of the tower!
Without you, people from abroad (like me) wouldnt be able to watch NY towers rise as we do!!!
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