I don't know but that small base for the canotilever supporting the top looks agressivily dangerous. I am sure it would never be built unless it was pure and safe but to me from a distance looking at the renders it looks unstable.
I will miss the overall height but
any action on this suspended tower will be an improvement over what it is right now.
I just wish they could have add or have added in their plan for a high end hotel [ ala a shashangri-la
http://www.shangri-la.com/ which was the first choice or some other Asian top end equivalent of the Shangri-la should have a Chicago presence even if it is not at this site anymore. ] to the deal due to the fact that it was to handle one before the collapse and it has more than enough parking and dead space to handle such an accomidation.
Too bad for Tang for not timing the market at the right time. I do not blame them, when it was drawn up it was high times... I even looked at a partial hotel portion before that model collapsed in the area months before. That partial hotel concept never took off in the Chicago region and it is a big reason why Trump took a bath on his nice tower north of the river.
The best thing for this parking base is to be built into something... Right now I am not too picky but I would like something that will at least stand the test of time. Does this new renders do this...I do not know, I think the jury is still out on this one.