Beginning post-tensioning
Standing on scaffolding nearly 30 feet above the casting basin floor, crews worked to thread hundreds of steel strands through the length of a 360-foot-long longitudinal pontoon in preparation for post-tensioning. Photo taken March 14, 2013.
Construction is complete on the second cycle of SR 520 bridge pontoons in Aberdeen. In this cycle, crews built six total pontoons:
• Three longitudinal pontoons (360 ft. x 75 ft. x 29 ft.)
• One cross pontoon (270 ft. x 75 ft. x 33 ft.)
• Two supplemental stability pontoons (98 ft. x 60 ft. x 28 ft.)
Beginning post-tensioning
Standing on scaffolding nearly 30 feet above the casting basin floor, crews worked to thread hundreds of steel strands through the length of a 360-foot-long longitudinal pontoon in preparation for post-tensioning. Photo taken March 14, 2013.
Construction is complete on the second cycle of SR 520 bridge pontoons in Aberdeen. In this cycle, crews built six total pontoons:
• Three longitudinal pontoons (360 ft. x 75 ft. x 29 ft.)
• One cross pontoon (270 ft. x 75 ft. x 33 ft.)
• Two supplemental stability pontoons (98 ft. x 60 ft. x 28 ft.)