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  #261  
Old Posted Jul 27, 2016, 5:21 PM
BuildThemTaller BuildThemTaller is offline
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Originally Posted by The Lurker View Post
^Looks like we missed each other by minutes, James

I'm no structural engineer, but it looks like the cross bracing between the vertical posts is capable of sliding. Is that the case? They are not riveted in place.

Here's what that section, along the north end of Randolph, is supposed to look like:

     
     
  #262  
Old Posted Jul 27, 2016, 5:54 PM
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Originally Posted by BuildThemTaller View Post
I'm no structural engineer, but it looks like the cross bracing between the vertical posts is capable of sliding. Is that the case? They are not riveted in place.

Here's what that section, along the north end of Randolph, is supposed to look like:
Not riveted, welded - they aren't going anywhere.


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  #263  
Old Posted Jul 27, 2016, 7:36 PM
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I'm incredibly curious now with all that steel bracing to the core in James' pic. Those steel joints above the cross bracing in Harry's pic makes it look like they are planning on building out over the sidewalk.

Anyone seen the diagrams for this thing? .... spyguy?

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Not riveted, welded - they aren't going anywhere.
     
     
  #264  
Old Posted Jul 27, 2016, 7:57 PM
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Originally Posted by rlw777 View Post
I'm incredibly curious now with all that steel bracing to the core in James' pic. Those steel joints above the cross bracing in Harry's pic makes it look like they are planning on building out over the sidewalk.

Anyone seen the diagrams for this thing? .... spyguy?
Could it be for the crane ? [ 111 W Wacker Mar 2013 ]
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  #265  
Old Posted Jul 27, 2016, 8:10 PM
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It must be for the crane? They haven't made a spot for it within the core. Although that steel seems pretty permanent.
     
     
  #266  
Old Posted Jul 27, 2016, 10:05 PM
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Could it be for the crane ?
It's gotta be for the crane... nice call Harry
     
     
  #267  
Old Posted Jul 28, 2016, 2:20 PM
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Originally Posted by rlw777 View Post
It's gotta be for the crane... nice call Harry
Wow, that's crazy. That crane's going to be really far out in the street then -- it's already protruding out over the temporary sidewalk. Updates as of 9:05 today (7/28):



     
     
  #268  
Old Posted Jul 28, 2016, 2:35 PM
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Confirmed with a surveyor ( SW corner of garage in JM's shot above ) that the extra steel is indeed for the crane.
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  #269  
Old Posted Jul 28, 2016, 3:43 PM
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Originally Posted by harryc View Post
Confirmed with a surveyor ( SW corner of garage in JM's shot above ) that the extra steel is indeed for the crane.
Wow. This has been a fun little mystery to solve. I wonder if the crane had to be positioned so far out onto the street to accommodate the crane from 215 W Lake. Fascinating.
     
     
  #270  
Old Posted Jul 28, 2016, 4:11 PM
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^ Yeah, I wonder why they didn't just position it within the core......could that really be the reason (even if this crane for 151 is one with a luffing jib - as I would expect, though I suppose not a certainty?)

^^ At any rate, nice work getting to the bottom of this one - you called it - and confirmed it!
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  #271  
Old Posted Jul 29, 2016, 5:35 PM
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12:30 today (7/29):

     
     
  #272  
Old Posted Aug 1, 2016, 2:23 AM
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Core beginning to rise crane base being installed above sidewalk to allow site traffic to pass underneath.

July 24
Steel !




July 25







July 28










A similar configuration was used on 111 Wacker where the crane was also mounted above the sidewalk.


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  #273  
Old Posted Aug 1, 2016, 3:01 AM
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I think the crane was being erected today.
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  #274  
Old Posted Aug 1, 2016, 2:23 PM
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Here it is, in all its craney glory.

     
     
  #275  
Old Posted Aug 1, 2016, 3:43 PM
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Wow, that's impressive. This one is sprouting like a weed.
     
     
  #276  
Old Posted Aug 1, 2016, 6:12 PM
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Woah that crane assembly is impressive.
     
     
  #277  
Old Posted Aug 1, 2016, 6:24 PM
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Originally Posted by Hayward View Post
Woah that crane assembly is impressive.
Even more impressive - it will be moved to 130 N Franklin when that job starts.
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  #278  
Old Posted Aug 1, 2016, 7:52 PM
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Even more impressive - it will be moved to 130 N Franklin when that job starts.
Whoa where did you hear that?
     
     
  #279  
Old Posted Aug 1, 2016, 10:25 PM
SamInTheLoop SamInTheLoop is offline
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Quote:
Originally Posted by harryc View Post
Even more impressive - it will be moved to 130 N Franklin when that job starts.

Harry, I might be being a little dense here, but what is it exactly you're saying will be moved to 130?
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  #280  
Old Posted Aug 1, 2016, 11:24 PM
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