Precedents / Marina City put caption here http://duranvirginia.wordpress.com/2012/11/15/architecturemarina-city-the-first-circular-apartment-buildings-in-history/ Marina City Project Overview Architect: Bertrand Goldberg Location: Chicago, Illinois, USA Project Year: 1959-1964 Marina City, at the time, was the tallest residential projects in the world and still remains one of the densest inhabited developments. Unlike any project before it, Marina City was an experiment of allocating diverse programs into a city within a city. Although, it is not as widely recognized as the Sears Tower or the John Hancock Building, Marina City s distinctive corn-cob shape has a strong presence among modern architecture, as well as Chicago s skyline. In 1959 when Bertrand Goldberg was commissioned for the project, he had no prior experience designing at such a large scale; he mainly worked on smaller scale residential and institutional projects. However, the developer, William McFetridge, president 2
of the Building Service Employees International Union, entrusted Goldberg to design a complex that would slow Chicago s urban exodus. At the beginning of the 1960s, those that lived in the city were growing tired of the dense, overcrowded conditions and had taken flight to the suburbs for a more open and accommodating way of life. Marina City was an attempt at combating and reversing the flow of people back into the city, so close to the Loop. It was a model of efficiency and convenience for modern living in a metropolitan area. put caption her 3
Precedents / Marina City put caption here The two towers contain identical floor plans. The bottom 19 floors form an exposed spiral parking ramp operated by valet with 896 parking spaces per building. The 20th floor of each contains a laundry room with panoramic views of the Loop, while floors 21 through 60 contain apartments (450 per tower). A 360-degree open-air roof deck lies on the 61st and top story. The buildings are accessed from separate lobbies that share a common below-grade mezzanine level as well as ground-level plaza entrances beside the House of Blues. Originally rental apartments, the complex converted to condominiums in 1977. 4
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Precedents / Marina City put Towere caption core here rising with Linden Crane Precedents Marina city / Marina City Building Systems + Construction Marina City was the first building in the United States to be constructed with tower cranes. The building s circular form had many economies. It offered the highest ratio of usable floor space to exterior skin. It reduced actual wind loads as well as the wind loads needed to be accommodated by building codes. The towers were built at the amazing speed of one floor per day on alternating towers - or one floor every two days on each tower. As the cores were poured, cranes moved up one floor and a construction elevator rose within each shaft to supply building materials. The concrete beams were poured using both regular and lightweight concrete. Regular strength concrete in columns and beams was necessary to prevent spalling when the fiberglass molds were removed; in the beams it was only used for a two-inch bottom layer, with lightweight concrete filling the remainder. The use of lightweight concrete allowed for a floor-to-floor height of eight feet six inches and smaller dimensions for the structural frame. This in turn led to savings that more than compensated for the delays due to pour stoppages on very cold days. 10
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Precedents / Marina City put caption here Rhino model in progress, 12
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