here's another reference to an
open-frame skyscraper idea (or in
this case, elevated trailer park):
archigram's trailer cage
http://www.arcspace.com/architects/archigram/images/archigram6_jpg.jpg
http://www.arcspace.com/architects/archigram/images/archigram_jpg.jpg
http://www.arcspace.com/architects/archigram/pages/archigram9_jpg.htm