The 6th Street Viaduct replacement project in Los Angeles has concluded the hanger installation of the first span and the removal of the falsework underneath, says COWI, an engineering consulting group. At 3,060 ft long and 100 ft wide, the bridge redevelopment, by architect Michael Maltzan and HNTB, includes 10 network arch spans, with a total of 388 hangers supporting the bridge deck. The original structure, built in 1932, is famed for its appearance in the movie “Grease.” COWI worked with the joint venture of Skanska-Stacy and Witbeck to develop a constructable erection sequence, which includes step-by-step camber and stress analyses, and hanger installation and stressing procedure.