This summer, crews set the first tub girders in Construction Package 2-3 at the Conejo Viaduct. Unlike the typical California Wide Flange girders already set on the pergola section, tub girders form an enclosed tube with multiple walls and are placed between the abutments, columns and pergola. Two girders are needed on each section to have enough room for two sets of high-speed rail tracks to be set on top. In May, six pre-cast tub girders were set on the south side of the Conejo Viaduct. Another 12 will be needed for the north. All tub girders are being manufactured internally at the Dragados-Flatiron Joint Venture Pre-Cast Tub Girder Facility in Kings County.
Crews can also be seen working to form the remaining edge beams on the west s Scan Me ide of the pergola section.