There should be an area that is common to all floorplates, if you overlay each plan. Within this area you can set up a standard column grid, and then any protrusions of the floorplate beyond the "common area" are cantilevered. (This may not work, depending on HOW much the tower zig-zags)
__________________
la forme d'une ville change plus vite, hélas! que le coeur d'un mortel...
|