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Old August 30th, 2013, 11:44 PM   #2621
Steve92691
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Quote:
Originally Posted by thejacko5 View Post
otie, are the cantilevered rafters single pieces? or will sections have to be preassembled on site?

doing a little math here, there appear to be roughly 90 subportals that have not had any portal sections added on top of them.

taking just those 90 locations, and adding 90 portals, 90 transition sections, and 90 rafters, that gives us 270 pieces (assuming rafters come in one piece). Say there are another 30 pieces to fill out the areas that have already been started. Call it 300 total

Assuming they are average 5 pieces per week (taking into consideration the winter coming up and the likely slower production for pieces higher in the air, that leaves us with 60 erection weeks remaining...

It will be a long haul.

If your erection lasts more than 60 weeks, consult your physician...SORRY, THAT WAS INFANTILE AND INAPPROPRIATE. BUT I COULD NOT RESIST....
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Old August 31st, 2013, 05:47 AM   #2622
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Quote:
Originally Posted by Otie View Post
No.
Damn. Any reason why is it taking so long?

Is the engineering and construction too complex?
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Old August 31st, 2013, 08:45 AM   #2623
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Quote:
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Damn. Any reason why is it taking so long?

Is the engineering and construction too complex?
There were similar periods of installing and removing parts of the lower portal steel on this project before they "got the hang of it" and progress eventually sped up.

Every new phase of this project involves a very steep learning curve for the construction crews ... and they are doing some of the most complex parts of the assembly now on either end of the structure ...

Once they learn the choreography of this, I'm pretty sure that the middle sections of this will be done at a faster rate.
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Old August 31st, 2013, 09:35 AM   #2624
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Hello Folks.

Erection schedule will be definitly faster while getting toward the top of the arches.
In facts:
1. after the 10th segment in each quadrant, arches will be bolted (not welded)
2. members will be lighter and geometric tollerances approcing the top wil be easier to accomplish
3. erector will have found a faster way to erect, tight and check items

So I believe the 60 weeks erection extimation for the steel structures could be too rough

Cheers
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Old September 1st, 2013, 04:51 AM   #2625
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Thanks for the info!
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Old September 3rd, 2013, 04:12 PM   #2626
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#5 NW 09/03/2013 9:10AM

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Old September 5th, 2013, 05:00 AM   #2627
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Looks like for past couple nights they are working during a night. Cranes are not working but there is movement on the ground which is surprise. Usually that never happens.
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Old September 5th, 2013, 05:07 PM   #2628
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Quote:
Originally Posted by webeagle12 View Post
Looks like for past couple nights they are working during a night. Cranes are not working but there is movement on the ground which is surprise. Usually that never happens.
I said this a few pages back. They started overnight crews to do late night interior work and for preparations for next morning lifts. Trying to move the schedule a little (very little) bit faster.
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Old September 6th, 2013, 04:24 AM   #2629
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Old September 6th, 2013, 05:03 AM   #2630
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they may be welding around the clock as required.

some of these joints are very big. when the joints get very thick, they require preheating. a piece this big is like a giant heat sink, so when you do get it up to temperature, you dont want to stop the weld until it is complete.
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Old September 6th, 2013, 01:35 PM   #2631
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new upper portals on site!
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Old September 6th, 2013, 04:50 PM   #2632
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Old September 7th, 2013, 02:21 AM   #2633
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#6 SW 09/06/2013



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Old September 7th, 2013, 03:26 AM   #2634
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Here's a article that mentions a little something about The World Trade Center Transportation Hub.
http://www.newsday.com/911-anniversa...lity-1.6020583
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Old September 7th, 2013, 05:57 PM   #2635
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The Transportation Hub still doesn't look a lot like the renderings.
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Old September 7th, 2013, 07:53 PM   #2636
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Quote:
Originally Posted by onewtclover View Post
The Transportation Hub still doesn't look a lot like the renderings.
???????
You do realize that so far there are only about 4 or 5 transitions beams on each side, that's out of 100s of beams yet to be placed in. This is not gonna "look like the renderings" for quite some time based on the pace of construction. I think by the end of next year we will be able to have that conversation.
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Old September 8th, 2013, 03:24 AM   #2637
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The Hub is now visible from my apartment.

image hosted on flickr

Hub from JC by drken10003, on Flickr
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Old September 9th, 2013, 05:46 PM   #2638
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#5 SW



I'll post better quality pictures at around 7 PM tonight
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Old September 9th, 2013, 05:57 PM   #2639
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I have a feeling that they have just one crane crew which operate or West or East crane. Just one at the time.
Please tell me that I an wrong! Please!
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Old September 9th, 2013, 08:08 PM   #2640
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Actually they do sometimes use both cranes at once, usually when they are unloading new deliveries of steel. But when they are erecting the big pieces they only use one at a time. So they probably only have one crew of steelworkers.
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