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  #1161  
Old Posted Jul 24, 2015, 10:38 PM
Clarkkent2420 Clarkkent2420 is offline
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Last edited by Clarkkent2420; Jul 25, 2015 at 2:37 AM.
     
     
  #1162  
Old Posted Jul 24, 2015, 10:43 PM
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Quote:
Originally Posted by LouisVanDerWright View Post
I am probably off on the actual scale of the weight we are talking about here, but there is, in fact, a balancing issue. It's not active loads they are worried about, it's static loads (I think I'm using these terms correctly?), i.e. having a million more (or some large number that I have no way of properly scaling, you get the point) on one side of the building would gradually tilt it out of level. This came from someone who had a discussion directly with Jim Goettsch about this design. It's not that having a bunch of people moving to one side of the building is going to harm it, it's that having a significantly higher load on one side of the building in combination with active loads will, over time, push the thing out of true. Goettsch was looking at doing something cooler with the setbacks on the top, but the limitations I described above made it impossible.

I wish I could remember the numbers he was citing, but he also told me how many millions (I think it was like 150 million or something, but that sounds absurdly high to me) of pounds each of these struts is going to be carrying. The point is the engineering here is very impressive.
Magnussen Klemencic is regarded as one of the top (if not THE top) tall building engineers in the world. I think they are the peer reviewer on Kingdom Tower - 4.5x the height of 150. Take a look at their office in Seattle (Google Ranier Tower, designed by MKA in 70's) and 150 N Riverside looks "normal".

150 million pounds would crumple that 65ksi column like tinfoil...Clark said the column load is like 9 kips (18 million pounds). But this engineering must be insanely complex. 18 million pounds is still about what all the steel in the entire building weighs (assuming 9000-10000 to da of steel).
     
     
  #1163  
Old Posted Jul 25, 2015, 6:13 AM
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  #1164  
Old Posted Jul 25, 2015, 1:52 PM
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This is definitely the coolest project happening right now. It's great how the building angle matches the steel angle of the Lake Street bridge. With the crane getting set up, I am even more excited to see how this will turn out.

O, and BVic, great shots all around. The last one above is excellent.
     
     
  #1165  
Old Posted Jul 25, 2015, 5:28 PM
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Tower Crane is up...

Screenshot from the construction cam...

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  #1166  
Old Posted Jul 25, 2015, 8:43 PM
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Since we're trading numbers, anyone know the math on how much that barge crane can lift without tipping? Or sinking?
     
     
  #1167  
Old Posted Jul 26, 2015, 9:29 PM
Clarkkent2420 Clarkkent2420 is offline
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Originally Posted by wierdaaron View Post
Since we're trading numbers, anyone know the math on how much that barge crane can lift without tipping? Or sinking?
If they picked up a quarter million pounds in that truss lift a couple weeks back, I'd imagine the ultimate capacity is at least double that amount. No way they'd try that though.
     
     
  #1168  
Old Posted Jul 27, 2015, 5:21 AM
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Quote:
Originally Posted by wierdaaron View Post
Since we're trading numbers, anyone know the math on how much that barge crane can lift without tipping? Or sinking?
Maybe this'll help.

http://www.allcrane.com/Articles/20

Quote:
660 tons of lifting capacity
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  #1169  
Old Posted Jul 27, 2015, 6:37 AM
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Great article. I've been lurking here for a decade now and this is by far the coolest project I've followed. Chicago or anywhere else. i'll be in town next weekend to catch some action.
     
     
  #1170  
Old Posted Jul 27, 2015, 2:26 PM
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Last edited by BVictor1; Jul 27, 2015 at 2:39 PM.
     
     
  #1171  
Old Posted Jul 28, 2015, 12:37 PM
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7/27
     
     
  #1172  
Old Posted Jul 28, 2015, 1:32 PM
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I'm guessing they will be done with that river monster once that steel bracing is up on the south end. Then this project should pick up some speed
     
     
  #1173  
Old Posted Jul 28, 2015, 2:53 PM
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The March of the Crane...

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  #1174  
Old Posted Jul 28, 2015, 5:38 PM
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^Nice angle on those last ones

Quote:
Originally Posted by rlw777 View Post
I'm guessing they will be done with that river monster once that steel bracing is up on the south end. Then this project should pick up some speed
Per OxBlue, that steel is being preassembled as we speak

     
     
  #1175  
Old Posted Jul 28, 2015, 6:33 PM
LouisVanDerWright LouisVanDerWright is offline
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Beat me to it, just drove by a minute ago and they have the angle joints installed on the base columns that they set the truss into. Cameramen at your ready! To your battle stations!
     
     
  #1176  
Old Posted Jul 30, 2015, 3:30 AM
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The neighborhood.

7/28/15
     
     
  #1177  
Old Posted Jul 31, 2015, 2:06 PM
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Pour today?

I saw 4 to 5, maybe more cement trucks along Wacker and Lake today, I don't always go this way to work, so it could be a daily thing for all I know.

What I do know, the photos capturing this process are bad ass, and in person, wow. The confluence is going to be epic.
     
     
  #1178  
Old Posted Jul 31, 2015, 3:34 PM
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pictures do not do this thing justice it is FREAKIN MASSIVE. Just look at it from across the river junction crossing the Franklin street bridge in person its like 'whoah that thing is gonna be huge'
     
     
  #1179  
Old Posted Jul 31, 2015, 7:14 PM
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They conveniently timed this during my lunch break today.

Video Link
     
     
  #1180  
Old Posted Jul 31, 2015, 7:43 PM
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Quote:
Originally Posted by Kngkyle View Post
They conveniently timed this during my lunch break today.

Video Link
I was on the river so I have shots from a different angle.
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