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Old February 5th, 2013, 05:49 PM   #5641
theAlone
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I don't always visit this thread, but when I do I'm expect that 432pa raises at 10-12 levels.
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Old February 5th, 2013, 06:43 PM   #5642
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Yes, a very busy site today...perimeter columns poured yesterday...core being poured today...more perimeter steel going up today...maybe tomorrow they will pour the slab...

Got a peek at the exterior surface walking by this morning (most is covered with tarps) some parts of the surface concrete is getting quite white now...still some patches of blueish purple color...
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Old February 5th, 2013, 08:59 PM   #5643
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The 57th crane is busy setting up columns on the west side. And they are still busy with pouring the core so I assume there will be a rise the day after tomorrow or maybe even tomorrow.
[IMG]http://i48.************/t5hh1g.png[/IMG]
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Old February 5th, 2013, 09:08 PM   #5644
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I would assume the core concrete has to set for at least 2 days before they can raise the form, no? I has to have a fair amount of strength as it has to support that superstructure.
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Old February 5th, 2013, 09:20 PM   #5645
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Indeed, I forgot that. But this week it is.

edit: and last days they have also put rebar on the floor. So if they put away all these stuff on it we might see a floor pour soon. That is quite a while ago that has happened.

Last edited by tim1807; February 5th, 2013 at 09:26 PM.
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Old February 5th, 2013, 11:10 PM   #5646
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this is because the first floor is two stories tall...so this is the first slab above grade slab
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Old February 5th, 2013, 11:11 PM   #5647
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Greeting from Portland everyone - I've been following this project over at SSP and just got up to speed on this thread.

Must say I've impressed with the quality of street level shots and expert info here. I was dumbfounded by those shots of the entire perimeter rebar beam being installed as one piece!!

And that shot looking up Park is fantastic. I used to work at 270 Park and it was nice to revisit that view.

Couple questions...

How is the floor slab attached to the core? Is there rebar jutting out from the core pour?

Also, when they pour the floor slab, how do the keep the grey concrete from mingling with the white perimeter mix? I imagine they do not want a "layer cake" effect occurring.
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Old February 5th, 2013, 11:15 PM   #5648
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[QUOTE=Dbronx;99963335]
How is the floor slab attached to the core? Is there rebar jutting out from the core pour?

QUOTE]

Very good question. I've been wondering that myself. I don't see how it attaches nor do I see any supports for the floor.

Your second question is also good - I had never thought of that.
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Old February 5th, 2013, 11:20 PM   #5649
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Quote:
Originally Posted by Dbronx View Post
Also, when they pour the floor slab, how do the keep the grey concrete from mingling with the white perimeter mix? I imagine they do not want a "layer cake" effect occurring.
If I am right the different pours are separated by temporary partitions.
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Old February 5th, 2013, 11:43 PM   #5650
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the exterior color is poured first...the slab butts up against the exterior and is poured after the ext has set so there is no issue with mixing.
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Old February 6th, 2013, 05:40 PM   #5651
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[QUOTE=600West218;99963464]
Quote:
Originally Posted by Dbronx View Post
How is the floor slab attached to the core? Is there rebar jutting out from the core pour?

QUOTE]

Very good question. I've been wondering that myself. I don't see how it attaches nor do I see any supports for the floor.

Your second question is also good - I had never thought of that.
It is a combination of two keyway and splicing methods:

1. Dayton Superior D55 Metal Strip. This uses a traditial lap splice method. http://www.buildsite.com/pdf/daytonr...ata-336900.pdf

2. Form Saver Mechanical Couplers and lumber key-way. This mechanically engages the spliced bars via threads: http://www.erico.com/public/library/Concrete/LT0098.pdf

Hope this helps.
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Old February 6th, 2013, 06:33 PM   #5652
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Thanks for the info. I'll have a look at the links when I can.

Lots of pouring again today but so far I can't tell what they are pouring. Not the floor slab that I can see.
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Old February 6th, 2013, 06:38 PM   #5653
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[QUOTE=Builder37;99991309]
Quote:
Originally Posted by 600West218 View Post
It is a combination of two keyway and splicing methods:

1. Dayton Superior D55 Metal Strip. This uses a traditial lap splice method. http://www.buildsite.com/pdf/daytonr...ata-336900.pdf

2. Form Saver Mechanical Couplers and lumber key-way. This mechanically engages the spliced bars via threads: http://www.erico.com/public/library/Concrete/LT0098.pdf

Hope this helps.
Also known as:

1. Pull out starter bars
2. Screw in starter bars
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Old February 6th, 2013, 07:06 PM   #5654
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[QUOTE=Builder37;99991309]
Quote:
Originally Posted by 600West218 View Post
It is a combination of two keyway and splicing methods:

1. Dayton Superior D55 Metal Strip. This uses a traditial lap splice method. http://www.buildsite.com/pdf/daytonr...ata-336900.pdf

2. Form Saver Mechanical Couplers and lumber key-way. This mechanically engages the spliced bars via threads: http://www.erico.com/public/library/Concrete/LT0098.pdf

Hope this helps.
Thanks! I knew I'd get the scoop here.
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Old February 6th, 2013, 07:43 PM   #5655
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Probably a week "old"..


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Old February 6th, 2013, 08:24 PM   #5656
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Wow, is that 10 stories?
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Old February 6th, 2013, 09:35 PM   #5657
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no, it isn't that quick.
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Old February 6th, 2013, 09:59 PM   #5658
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Still, this is growing rapidly!
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Old February 6th, 2013, 10:22 PM   #5659
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they are pouring the perimeter sill...you can really see the difference in the color of the concrete...and how the slab bumps up to the sill (57 st camera) very cool
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Old February 6th, 2013, 11:18 PM   #5660
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[QUOTE=Builder37;99991309]
Quote:
Originally Posted by 600West218 View Post
It is a combination of two keyway and splicing methods:

1. Dayton Superior D55 Metal Strip. This uses a traditial lap splice method. http://www.buildsite.com/pdf/daytonr...ata-336900.pdf

2. Form Saver Mechanical Couplers and lumber key-way. This mechanically engages the spliced bars via threads: http://www.erico.com/public/library/Concrete/LT0098.pdf

Hope this helps.
The Lumber key way looks like a great solution, however it also looks very time consuming screwing all them threads in. This must take alot of man hours to do?

Are the outer perimeter columns going to keep up with the core as we see at the moment all the way to the top? (ie. the core 1-2 floors above perimeter columns)

Thanks for all the info Builder37
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