William Randolph Hearst had demanded that his six-story corporate headquarters in New York City be engineered to support a future skyscraper.
Sir Norman Foster, an English architect, followed through with his design of the 46-story Hearst Tower.
The diagonal motif is also expressed in the angular positioning of the escalators that slice through a water sculpture carrying visitors up to the main lobby. Ice Fall, by artist/designer James Carpenter, involves 50 tons of cast glass prisms and accent blocks arranged in a multitude of diagonal patterns that capture light from above and projects it diagonally, extending the theme of the “tower’s diagonal grid structure.”
 This arresting design feature (called bird’s mouths) required the development of a special window cleaning system that itself cost $3M to build and 3 years to develop.
 Fabricator: John Lewis Glass, Oakland, CA. He works with a low iron, clear, soda lime glass as confirmed by Lynn Zboyovsky, Chief Operating Officer, John Lewis Glass.