This was the first building in Chicago to use a raised-floor pressurized plenum system, allowing for air to be pumped in through the floors for individuals to control their climates using floor diffusers.
The basement levels were constructed to allow for the future opening of a major transit station, connecting the Blue & Red subway lines.
This is the second Chicago skyscraper by Catalan architect Ricardo Bofill, following the R.R. Donnelley Building.
Do you need more information about this building and its related companies?