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JICOSH Home > Case Studies > Case No.77
Case No.77

Fall because the hook of the safety belt rope came off from its mounting during assembly of steel power transmission tower

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[Description of the Accident]

This accident occurred during work to construct a steel tower for power transmission lines.

On the day of the accident, framing materials for the tower had been assembled on the ground and transported to the site by a drag shovel. These materials were lifted by hoisting equipment, and were bolted to the tower.

From the time they started work in the morning, the victim and a coworker had been riding the hoist as they moved framing materials to a location that would permit easy installation. During an attempt to ascend, the rope of the safety belt was caught on a bolt of the steel tower.

When the victim tried to remove the rope, the hook of the safety belt rope came off from its mounting, and the victim fell to the ground.

[Presumed causes]

1. The method to attach the safety belt was not appropriate.

2. Only one rope was attached to the safety belt.

3. Netting to prevent falls had not been installed.

4. Procedures to attach the rope to the safety belt were not properly prepared.

[Type of business] Telecommunications construction work
[Causal object] Other tools
[Type of accident] Fall
[Number of victims] One fatality