Thornton Tomasetti provided structural services for the redevelopment of a 10-acre site in downtown Washington. Work included design for two 11-story office buildings and below-grade parking for 1,555 vehicles. The development is pursuing LEED Silver certification.
The project’s two commercial buildings will provide a total of 520,000 square feet of offices and 185,000 square feet of retail and dining and will include green roofs. The structures consist of post-tensioned concrete with shear-wall lateral systems.
A four-level underground parking garage was designed as four separate structures connected by expansion joints. Occupying the entire site, the conventionally-reinforced concrete structure serves as the foundation for the office buildings, four residential buildings (designed by others), a public plaza, and a major city street.
Additional residential components of the $700 million development were designed by a partner structural engineering firm.
Location: Washington, D.C.
Owner: District of Columbia
Architect: Foster + Partners (Design), Shalom Baranes Associates (Architect of Record) and Gustafson Guthrie Nichol, Ltd. (Landscape)
Area: 700,000 sf
Completion Date: 2013