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JICOSH Home > Case Studies > Case No.82
Case No.82

Fall from mobile crane bucket during descending

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[Description of the Accident]

This accident occurred during work to dismantle some suspended scaffolding that had been used to carry out repair work on a signboard.

The work was started by using a mobile crane to lower the beam that had supported the suspended scaffolding. In order to remove the scaffolding flooring, the victim then rode the bucket of the mobile crane and started to sling and lower the flooring to the ground by the crane.

During this operation, the bucket carrying the scaffolding got caught on an angle fitting used to support the signboard, and the victim tried to free the bucket by swinging it back and forth.

Immediately thereafter, the bucket came loose from the hook of the crane and the victim fell to the ground.

[Causes supposed]

1. The operator of the crane lifted the bucket while the victim was riding atop the suspended scaffolding in the bucket.

2. When trying to free up the caught flooring, the worker rode atop the suspended scaffolding flooring while swinging the bucket back and forth.

3. Adequate arrangements were not made in advance regarding the working methods, etc., to be used in dismantling and removing the scaffolding.

[Type of business] Other building construction work
[Caused by] Mobile crane
[Type of accident] Fall
[Number of victims] One fatality