segment of the building. Wright's floor plan of the 528th floor shows it would be served by only one elevator shaft. The elevators were to be "atomic-powered", capable of mile-per-minute speeds, and running on ratchets instead of suspended by cables. But a realistic design would be powered by a "third rail" like subways. The elevator banks extend beyond the sloping exterior walls at various points, giving the building the appearance of an elongated pyramid with protruding parapets. He said these elevators would enable the building to be evacuated in one hour, in combination with escalators that would serve the five lowest floors. In his 1957 book, A Testament, Wright described the proposed structure with floor plans of the "base", 320th, and 528th (highest) floors. The floor plan for the 320th floor shows a single, open staircase, not separated from the surrounding office space in any way, not even with a door. The floor plan of the 528th floor shows that access is solely by a single elevator, with no staircase at all. Wright believed that because his building was fireproof, any fire precautions would be moot. Cultural references Fang Island released a song called "The Illinois" on their 2010 self-titled album that was inspired by the design. In 2014, Chicago-based Goose Island Brewery began bottling an IPA named The Illinois in honor of Wright's design, with label art featuring a hop cone design rendered to appear as if it were one of the architect's trademark stained glass windows. See also List of visionary tall buildings and structures List of tallest buildings and structures in the world X-Seed 4000 Shimizu Mega-City Pyramid Sky Mile Tower Burj Khalifa Jeddah Tower Chicago Spire Arcology Barad-Dûr References External links One mile high tower Video: A peaceful day in Broadacre city Wright information page Italian page on the Illinois Qualcomm Stadium renovation in San Diego may include Illinois-like supertall Details several tall building designs, including The Illinois High resolution image of The Illinois drawing Frank Lloyd Wright buildings Unbuilt buildings and structures in the United States Proposed buildings and structures in Illinois Proposed skyscrapers in the United States Unbuilt skyscrapers