Known popularly as the ‘corn cob’ buildings, the semi-circular balconies that define these towers’ exteriors are the outgrowth of space-efficient, wedge-shaped apartments within. The theme of semi-circles is carried out in the lower story parking decks as negative space, defined by curved support structures. During design and planning, architect Bertrand Goldberg was striving for unprecedented levels of efficiency and economy, which led to the use of reinforced concrete. The resulting expanse of unadorned concrete was not only groundbreaking at the time, but still differentiates the building today.
