1st, 5th and 9th Floors of Small Residential Building The 1st, 5th and 9th floors of this building would be lined with post office boxes in the hallways and would have access to the high-volume express elevators that would take passengers to the various sky lobbies. The elevators would be located in buildings adjacent, both north and south. See also: The Postal System section of the Residents Guide. Illustration by Orville Simpson II. Click on the thumbnail photo above to see it full-size. Press your browser's "back" button to return to this page.