Fire-rated, from above and below

Photo by Perkins+Will, New York City

The basics: New York University’s subterranean Stern School of Business features an innovative glass exterior walking surface/ceiling. The 2,000-square-foot load-bearing skylight floods natural light from the outside plaza into the underground school. The glass floor system also acts as a ceiling, and had to meet the city’s 1-hour fire-rated requirements for roof assemblies.

The players: Architect, Perkins+Will, New York City; glass system supplier, Greenlite Glass Systems Inc., Port Coquitlam, BC; textured glass supplier, Saint-Gobain, France; fire-rated glass supplier, Vetrotech Saint-Gobain, with North American headquarters in Auburn, Wash.; general contractor, Structure Tone, New York City; contract glazier, A-Val Architectural Metal Corp., Mount Vernon, N.Y.

The glass and systems: LiteFlam glass system that features a textured walking surface glass and 60-minute fire-rated glass. The structural system can handle loads up to 100 pounds per square foot, according to an article from Architectural Products.