Lucas Jackson / Reuters / Yahoo! News
Ooops... there are at least 2 of them... Found another one, which is located at the NE section of the tower. Seems like I was wrong and there will be indeed 4 columns, each located at the NE, SE, SW, NW areas respectively, each connecting one perimeter column to a corner of the core. Apologies for the guessing, but drawings are a bit outdated.
Originally Posted by chris123678
So You Mean that there's only one and not four jumps?
Wouldn't it be 2?
The steel that they raise in place fits one or two floors?
You're confused! Still 4 jumps to reach the roof.