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JICOSH Home > Case Studies > Case No.17
Case No.17

Logs falling from a barker table during work using an overhead traveling crane to hoist logs into position for processing

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[Circumstances of Incident]

The accident occurred on the drainage deck adjacent to a lumberyard at a factory that manufactures and sells construction materials.

The work on the day of the accident involved using a radio-controlled overhead traveling crane with a lifting load of 10 tons to hoist sling-loads containing six logs each from the drainage deck to the 3.3-m high table of a drum barker located adjacent to the drainage deck. The victim was carrying out this work by himself.

When the victim was carrying out slinging work on the drainage deck, one of the six logs in the fourth load that had been piled atop the barker table fell back to the drainage deck, striking the victim in the back. The victim died the next day due to bleeding in the abdominal cavity.

While stopper wedges had been installed in four places at the edge of drum barker table to prevent logs from falling back to the drainage deck, these wedges were only 43 cm thick-raising the danger that raw logs could roll off the table when they were piled two layers high.

The following can be cited as the causes of this accident.

1 While the table is big enough to hold three sling-loads (a total of 18 logs) at a time without piling if they are of uniform shape, only two sling-loads (12 logs) could be reasonably accommodated without stacking if the logs had any curves or bends. Despite this fact, it is assumed that the victim had placed three sling-loads of logs on the table, and that one of the logs rolled over the stopper wedges and fell.

2 It is also assumed that because the victim was carrying out the slinging work alone with his back to the table, he did not notice the falling of the log.
[Type of business] Lumber industry
[Type of accident]Crushed
[Number of victims] One fatality