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E. Barrett Prettyman Federal Courthouse

Owner: General Services Administration
Location: Washington, D.C.
Square Footage: 450,000 (new Annex)
Completion Date: August 2007
Role:  Subcontractor


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E. Barrett Prettyman Federal Courthouse

The E. Barrett Prettyman Federal Courthouse currently houses both the U.S. District Court for the District of Columbia and the U.S. Court of Appeals for the District. Singleton’s work on the building involved two separate projects – renovations to the existing building, which took place entirely at night, and building a new Annex.

The new Annex building consists of a new prisoner transportation tunnel connected to the existing courthouse, an underground parking garage, courtrooms, and prisoner detention areas, as well as office space for staff including the U.S. Marshals Service, legal counsel, the judges’ staff, and the judges’ personal chambers. The building’s penthouse area houses electrical and mechanical systems, where Singleton installed two 750kW generators, paralleling switchgear and a number of automatic transfer switches. The Annex’s main electric room, which contains three new network transformer vaults and new 15kV switchgear, is located on one of the parking levels.

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E. Barrett Prettyman Federal Courthouse

Singleton installed 114 different types of lighting fixtures in the Annex ceilings with custom architectural finishes, in courtrooms with custom millwork, and on the sidewalk, where each illuminated bollard was custom made for each individual location. The tenant floors included a full-service kitchen and dining area, a six-story glass atrium connecting the Annex to the existing courthouse and nine new courtrooms. Plans for the courtrooms featured elaborate custom lighting, dimming systems and specialized audio/visual systems, all of which had to be coordinated with very specific millwork details. Prior to construction, Singleton built a full-scale courtroom mock-up off-site to enable the judges to comment and make any necessary changes.

Singleton’s role expanded beyond power and lighting to include a complete fire alarm system, all of the telecom and data wiring, a large audio/visual package, a detention area security system, 20 dimming systems, and a new site lighting package including D.C. streetlights.