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Project

GSA Headquarters Renovation and Courtyard Infill

We provided structural design services for the renovation of an existing 665,000-square-foot structure and the addition of 134,000 square feet of new office space in the 1917 building’s courtyards.

Lead Contact

Project Details

Project Partners
Shalom Baranes Associates
Owner
General Services Administration
Location
Washington, D.C.
Completion Date
Area
799,000 ft²
Sustainability
LEED Gold Certification
GSA Headquarters Renovation and Courtyard Infill in Washington, D.C. Thornton Tomasetti

Overview

We provided structural design services to Shalom Baranes Associates for the renovation of an existing 665,000-square-foot structure and the addition of 134,000 square feet of new office space in the 1917 building’s courtyards.

Highlights

  • The modernization replaced outdated building systems, modified the structure to comply with modern ADA regulations and improved its environmental performance.
  • The project included standards for GSA secure facilities. The infill construction was designed for progressive collapse, while both infill space and exiting structure will incorporate blast-mitigation windows.
  • In 2009, the renovation design was revised to incorporate additional sustainability features to meet the criteria for LEED Gold certification, including structural support for photovoltaic roof panels and a wastewater retention system.
  • Phase one construction, which includes the renovation of most of the existing building and the new construction in one courtyard, began in 2010.

Capabilities