Marina City is a thirty-six-million-dollar project built on only three acres of land in the heart of Chicago's Loop. A dramatic landmark in the Chicago skyline, it culminated thirty years of thought and development for Goldberg. Each of the twin, sixty-story towers has four hundred and fifty apartments in its upper two-thirds, the lower third is a continuous parking ramp that spirals upwards, accommodating four hundred and fifty automobiles. Since the residential level starts at the twenty-first story, magnificent views of the city are enjoyed from every apartment...Goldberg felt that there were advantages to using circular forms because of the aerodynamic properties of cylindrical high-rise structures: : the aerodynamic properties in a cylindrical high-rise structure; the structural equidistance from the center, and therefore uniform function of all parts; the absence of special corner conditions; and the creation of centrifugal or 'kinetic' spaces resulting from non-parallel walls. The towers derive much of their rigidity from the 35-foot-diameter cylindrical core that houses each building's services and utilities like a vertical street. Service spaces in apartments were grouped toward this core, giving living areas the light and view. The construction of the core preceded that of the floors, providing a rising foundation for the erection crane, thereby saving many working days. The project is all-electric, with heat and hot water individually produced in each apartment...Also housed in these magnificent structures are a sixteen-story office building, a 1750 seat theater, an auditorium, stores, restaurants, bowling alleys, swimming pool, skating rink, a gymnasium, a sculptured garden, and a marina that accommodates 700 small crafts. Source: Paul Heyer. Architects on Architecture: New Directions in America. p51-52 / 'this development's two audacious, 60-story, petal-ringed towers were the tallest residential buildings and tallest concrete structures in the world.' Source: Sylvia Hart Wright. Sourcebook of Contemporary North American Architecture: From Postwar to Postmodern. p 36.
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