Washington, D.C.’s sustainable, modern glass box


Photos by Ron Blunt Photography, Washington, D.C.

The basics: Washington, D.C.'s 1050 K St. office building is a sustainable interpretation of a modern glass box. The all-glass, 11-story, 136,000-square-foot building earned Gold certification from the U.S. Green Building Council's Leadership in Energy and Environmental Design program, and features glazing systems designed to maximize daylighting while minimizing solar heat gain and glare.

The players: Architect, Hickok Cole, Washington, D.C.; curtain wall, window systems and sunshade supplier, Wausau Window & Wall Systems, Wausau, Wis.; glass fabricator, Viracon, Owatonna, Minn.; glazing contractor, Harmon Inc., Minneapolis; point-support glass and system manufacturer, Pilkington North America, Toledo; general contractor, Fairmont Builders, Bethesda, Md.

The glass and systems: Blue, insulating low-emissivity floor-to-ceiling glass with a 50 percent ceramic frit used up to the sill mullion in the Unit Wall Series curtain wall; 4250-LP Low Profile Series fixed windows; low-iron point-support lobby enclosure; and a sloped-glass roof. The building features ClearStory sunshades on the south elevation, and custom, extended covers were installed on the west elevation. The sunshades were engineered and factory-assembled as integral to the curtain wall system, for smooth installation and field attachment. 

Read a complete project feature about this building.