Fifth Floor Modernization, U.S. General Accounting Office

As part of a complete building modernization, the 210,000 SF Fifth floor of the General Accounting Office was renovated to provide for technology-friendly general office spaces, several executive suites and video teleconferencing rooms. Of the many unique challenges, the design was held to an aggressive schedule, and had to insure that the building would remain in service throughout the construction.

The General Accounting Office building consists of a total of seven occupied floors. Therefore, in order to renovate the fifth floor, careful coordination with the building infrastructure was required. The mechanical system was upgraded and tied directly into the existing vertical duct risers. The medium pressure duct distribution served a total of 290 fan powered supply air terminal units. The utilization of direct digital controls allowed for global reset capabilities with a totally digital installation. The toilet rooms were completely upgraded with new fixtures, sanitary, vent and domestic water piping. Plumbing risers were replaced on this floor and sized for the renovated toilet rooms.

Project Features

• Administrative space
• Video teleconferencing
• Occupied space renovation
• 290 fan powered air terminal units

Services Provided

• Mechanical
• Electrical
• Plumbing
• Fire protection


• 210,000 SF


• Peck Peck & Associates