Thread: CHICAGO | CNA Center (151 N. Franklin) | 568 FT | 36 FLOORS
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  #265  
Old Posted Jul 27, 2016, 8:10 PM
Northwest Northwest is offline
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Join Date: Oct 2007
Location: Chicago
Posts: 413
It must be for the crane? They haven't made a spot for it within the core. Although that steel seems pretty permanent.