All-glass One Bryant Park achieves LEED Platinum
The basics: The 55-story, $2 billion One Bryant Place, or Bank of America Tower, in New York City is the first commercial high-rise to earn Platinum certification from the U.S. Green Building Council's Leadership in Energy and Environmental Design program. The crystal-like tower is designed to maximize daylight, while minimizing glare and heat gain. A silk screen pattern on the floor-to-ceiling glass, along with an automatic interior shading system of louvered blinds, helpregulate heat gain and glare. To capitalize on the natural lighting, the building features lighting fixtures that are energy efficient, dimmable and zoned to provide energy savings, according to a March 2009 article from Architectural Lighting Magazine. The building interior also features glass partitions and walls to allow deeper light penetration. Structural glass encloses the lobby, and a deep wood-clad overhang provides shading.
The players: Architect, Cook+Fox Architects, New York City; general contractor, Tishman Construction Corp., New York City; glass fabricator, Viracon, Owatonna, Minn.; point-supported wall system supplier, installer, W&W Glass, Nanuet, N.Y.; curtain wall glazing contractor, Permasteelisa Cladding Technologies Ltd., Windsor, Conn.
Photos by Andy Ryan Photography Inc., New York City, courtesy of W&W Glass, Nanuet, N.Y.
The glass and systems:The tower features silk-screened VE 13-2M glass, low-iron Starphire glass with a double silver low-emissivity coating. "The floor-to-ceiling glass features a graduated silk-screen pattern on the top and bottom portion of the glass," says Don McCann, architectural design manager, Viracon. "The silk screen starts with a tight dot pattern and, essentially, fades away as it moves toward the central viewing area of the glass." The top portion of the silk-screen pattern, a white ceramic frit, provides daylighting control, mitigating glare. The bottom portion of the pattern, which rises up to about desk level, is for aesthetics, "hiding desk clutter," McCann says. The lobby features a Pilkington Planar structural glass system.