On Aug. 9, the National Transportation Safety Board released the latest update on its investigation into the March 15 Florida International University pedestrian bridge collapse. It still, however, isn’t ready to identify the probable cause of the structure’s failure despite photo evidence of cracks — some fissure-like — in the bridge deck and other areas, presumably that developed after the prefabricated span was set in place just a few days before the fatal incident.
The bridge was transported into position from its offsite location on March 10 to much fanfare, while its building method, accelerated bridge construction, was touted as a way to deliver such structures with minimal interruption to traffic. Five days later, the bridge collapsed onto vehicular traffic below, killing six — one bridge worker and five vehicle occupants — and injuring several others.
The collapse occurred while workers were tightening, or re-tensioning, steel rods at the bridge’s north end, including at diagonal member 11, after they were de-tensioned on the day of the move.
Keep reading this article at: https://www.constructiondive.com/news/new-ntsb-report-on-fiu-bridge-collapse-stops-shy-of-naming-a-culprit/530346/
See NTSB reports at:
- Mar. 25, 2018 Initial Report: https://www.ntsb.gov/investigations/AccidentReports/Pages/HWY18MH009-prelim-.aspx
- Aug. 9, 2018 Updated Report: https://www.ntsb.gov/investigations/AccidentReports/Reports/HWY18MH009-investigative-update.pdf