| Case Name |
A workman mistook his step and fell on the steel column during an inspection. |
| Pictograph |
|
| Date |
May 1979 |
| Place |
The Kasugai City, Aichi Prefecture. |
| Location |
2 floors of iron frame construction work. |
| Overview |
On checking the conjunction of the bolts using ratchet over the steel column, A workman mistook his step and fell down to concrete floor 4.5m below . |
| Incident |
A workman mistook his step and fell down 4.5m belowon checking of binding conjunction of the volt on the steel column. |
| Sequence |
On the construction work of 2 floors of iron frame, the main work was almost completed by the subcontractor in the morning. The vitim was the chief of the contractor came from other place in the afternoon.He did temporary tightening and brace involving raising steel building.
The victim was checking the bolts by using rachet around 17:20, then he missed the step and fell down to the concrete ground 4.5m below, and died next day. |
| Cause |
He wore the safty belt, but it was not fixed.
He wore helmet, but it was for the guard from the falling materials,not for self falling.
Falling prevention net was not installed at that time.
The shortage of the safety and recognition of risks. |
| Countermeasures |
The installation of the fall prevention net. The execution of education and training of the safety belt use. It must be imposed that the helmet for hazard control by the crash is worn in the high-place work. |
| Knowledge Comment |
The safety belt must be used, when the security can not be confirmed. Helmets must be selected and be worn according to the kind of works. Main rope first disaster prevention net is second. |
| Background |
Crash prevention net must be installed immediately after the steel is installed, but in this case, it was installed when the suspension scaffold was installed before main tightening, which was mistaken order of process. |
| Scenario |
| Primary Scenario
|
Ignorance of Procedure, Disregard of Procedure, Carelessness, Insufficient Understanding, Poor Value Perception, Poor Safety Awareness, Ignorance, Insufficient Knowledge, Regular Movement, Dangerous Movement, Malicious Act, Rule Violation, Regular Movement, Dangerous Movement, Bodily Harm, Harm to Physical Well-being, Bodily Harm, Death
|
|
| Sources |
Disaster case, KENSAIBOU Aichi VOL.S54.12.1
|
| Number of Deaths |
1 |
| Field |
Civil Engineering
|
| Author |
IKAI, Seiji (ICHITEC CORPORATION)
BABA, Kanji (ICHITEC CORPORATION)
|
