Bolts fail, trailer disconnects from truck and crashes in ditch

Safety Alert Type: 
Log Hauling
Canfor Woodlands Operations (Prince George area)
Date of Incident / Close Call: 
Company Name: 
Details of Incident / Close Call: 

A B-train truck driver was rounding a corner on a forest service road when the mounting bolts for the scale pads failed. The trailer became unattached from the tractor, crossed the center line and went off the left side of the road, crashing in a deep ditch and causing over $40,000 in damage to both trailers.

The driver stated that he had slowed to below the posted speed limit of 80 km/h when rounding the corner. The driver had been travelling over rough roads, which is believed to be what led to the stress and wear on the bolts, causing them to eventually break off.

Key Learnings:

  • This could have been a very serious incident had there been oncoming traffic or if it had occurred somewhere else.
  • It is very important to complete Pre/Post-Trip truck inspections as bolts can become worn through use.
  • Follow-up inspections should be completed to ensure drivers are completing their required inspections.


Learnings and Suggestions: 
  • A good maintenance program which includes Pre/Post-Trip truck inspections can help to identify potential problems before they reach the point of failure.
  • Simply hitting bolts with a hammer can help detect if the bolts are broken or loose.
  • Visual inspections may not be sufficient. They can be deceiving when the bolts are covered with ice, snow or mud so keeping critical areas clean for visual inspections should also be part of any maintenance program.


For more information on this submitted alert: 

For more information, contact: Tyson von den Steinen Canfor Woodlands 250-962-3229

File attachments
Bolts fail, trailer disconnects from truck and crashes in ditch.pdf
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