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Detached height clearance bar found on HV cable carriage way

What happened - icon

What happened?

Operators performing inspections found a height clearance bar attached to a high voltage (HV) cable carriage way had become detached at one end and was suspended in the vertical position.

Further investigation found the D shackle and the bracket that attaches the D shackle to the carriage way fixing point on the ground disassembled.

Disassembled D shackle and bracket found on the ground in the drop zone
What happened - icon

Why did it happen?

The carriage way for the HV cable and associated height clearance bar was installed as a modification to the existing gas plant.

Both fixing components (D shackle and bolted angle bracket) had come undone and were found on the ground.

D shackle did not have a secondary fixing device such as a split pin in the shackle bolt.

A potential contributing factor was high winds over the previous few days.

Detached height clearance bar suspended in the vertical position
What happened - icon

What did they learn?

Identify and inspect D shackles and mounting bolts used to retain clearance bars and other objects at height.

Employ a secondary securing device such as a split pin on D shackle bolts used to retain objects at height.

What happened - icon

Ask yourself or your crew

Do you have height clearance bars and other objects at height retained by D shackles on your site? Are these D shackles secured by secondary retention? How do you report cases where this secondary retention is missing (potential dropped objects)?

Do you carry out periodic inspections of D shackles and mounting bolts used for these types of applications?

Are the inspection criteria for D shackles and mounting bolts clearly defined? (e.g. correct type of shackle for application; secondary retention fitted).

  • What happened?

    Operators performing inspections found a height clearance bar attached to a high voltage (HV) cable carriage way had become detached at one end and was suspended in the vertical position.

    Further investigation found the D shackle and the bracket that attaches the D shackle to the carriage way fixing point on the ground disassembled.

    Disassembled D shackle and bracket found on the ground in the drop zone
  • Why did it happen?

    The carriage way for the HV cable and associated height clearance bar was installed as a modification to the existing gas plant.

    Both fixing components (D shackle and bolted angle bracket) had come undone and were found on the ground.

    D shackle did not have a secondary fixing device such as a split pin in the shackle bolt.

    A potential contributing factor was high winds over the previous few days.

    Detached height clearance bar suspended in the vertical position
  • What did they learn?

    Identify and inspect D shackles and mounting bolts used to retain clearance bars and other objects at height.

    Employ a secondary securing device such as a split pin on D shackle bolts used to retain objects at height.

    What learn - icon
  • Ask yourself or your crew

    Do you have height clearance bars and other objects at height retained by D shackles on your site? Are these D shackles secured by secondary retention? How do you report cases where this secondary retention is missing (potential dropped objects)?

    Do you carry out periodic inspections of D shackles and mounting bolts used for these types of applications?

    Are the inspection criteria for D shackles and mounting bolts clearly defined? (e.g. correct type of shackle for application; secondary retention fitted).

    Ask your crew - icon
Published on 30/10/24 60 Views

Operators performing inspections found a height clearance bar attached to a high voltage (HV) cable carriage way had become detached at one end and was suspended in the vertical position. Further investigation found the D shackle and the bracket that attaches the D shackle to the carriage way fixing point on the ground disassembled.

Original material courtesy of Safer Together (Australia)

To access the PDF and PowerPoint versions, please visit https://www.safertogether.com.au/resources/sharing-library/working-on-near-fixed-equipment-person-in-line-of-fire-leb-toolbox