fromwww.cbc.ca
6 days agoInsufficient rail screws behind days-long GO disruptions, Metrolinx CEO says | CBC News
A preliminary investigation into the incident found the derailment happened because nine screws holding down rail fastenings on part of the track leading into Union Station gave way under fatigue, Metrolinx CEO Michael Lindsay said. These lag screws should be fastened by four screws in the plate. At this particular location they were fastened by two, he said, citing the latest track standards, updated in 2016.
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