The January 2026 issue of Modern Steel Construction features the repositioning of 600 Fifth Street NW in Washington, D.C. The 1970s brutalist building with a concrete frame served as the former HQ for WMATA, the DMV’s public transit agency. Working with architect Pickard Chilton, Thornton Tomasetti transformed the building into a modern corporate environment – and steel additions were at the center of the design. Learn more about the repositioning and engineering work involving steel here or at the linked PDF.