The architectural and engineering teams behind the renovation of 600 Fifth Street in Washington, D.C., updated a concrete-framed 1970s Brutalist building with a concrete frame into a modern corporate headquarters, and steel additions were at the center of the design. The design team anticipated the design and construction challenges, and based off those, incorporated more than 1,500 tons of steel framing into the concrete structure because of stee's weight, ease of installation, and ability to be installed retroactively.
Architects Pickard Chilton and Kendall/Heaton Associates, alongside structural engineer Thornton Tomasetti, were charged with delivering a modern, trophy-class building with 400,000 sq. ft of cutting-edge office space and 20,000 sq. ft of ground-floor retail.