Developers and building owners are constantly searching for pathways to extend their buildings to the great outdoors.  

Take the case of the iconic Willis Tower in Chicago, whose owners recently announced a $500 million facelift of the nation’s second-tallest building. That renovation will include a 30,000-sf outdoor deck and garden and a new three-story, all-glass structure that will sit on top of the skyscraper’s existing street-level stone plaza. The new design will break the barrier that currently separates the building from the urban streetscape.






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