1. Fall of Steel Plate Displaced from Hook during Carriage
2010-교육미디어-1024
Safety–Training
Media Dev
Grave Accident Case (Manufacturing)
Fall of Steel Plate Displaced from Hook during Carriage

2. Contents Fatal Electric Shock during Mixer Clean-up
Overview of Accident I
Object Causing Accident II
Details of Accident
III
Cause of Accident IV
Prevention of Accident V
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3. Overview of Accident
On Feb. 25, 2008, 20:30, OO Company located in Ulsan City
Crane hook
Chain
Hook
The victim was using a crane to carry a steel plate hung on a lifting hook.
Steel plate
The lifting hook dropped the steel plate, which struck the victim’s shoulder and the victim died during medical treatment.
Overview
Process
Object
Details
Cause
Prevention

4. Process of Accident Process of accident Plate received Plasma cutting
Carriage
Improvement
Sorting
Release
Process of accident
This process involves cutting the steel plates to a set size with a CNC plasma cutter, piling the steel plates on the workshop floor with a crane and moving them with a forklift to the outside storage area.
Overview
Process
Object
Details
Cause
Prevention

5. Object Causing Accident
Object: Lifting hook
Object: Lifting hook
Width: 110mm
Length: 250mm
Hanging type: double
Manufacturer: in-house
Remarks: Lifting magnet (3,000kg)
not used
Overview
Process
Object
Details
Cause
Prevention

6. CNC plasma cutting process
Details of Accident
CNC plasma cutting process
Accident site
The victim hung double chains connected to both sides of the steel plate at the lifting hook to move the steel plate placed on the surface plate of the plasma cutting process.
※ Steel plate size: 3,050mm*3,000mm*14mm, 1,000kg
Overview
Process
Object
Details
Cause
Prevention

7. Steel plate transported during accident
Details of Accident
Object lifting hook
Steel plate transported during accident
The victim was operating the crane (10 tons) with a remote control to lift the steel plate when it was displaced from the hook and struck the victim on the shoulder.
Overview
Process
Object
Details
Cause
Prevention

8. Details of Accident
Crane (10 tons) that carried the steel plate
during accident
Lifting hook and lifting magnet
The lifting magnet (permanent magnet) was connected to the crane hook, but it was not intended for a number of layers of smaller materials on the steel plate. A lifting hook that was designed and made in-house was normally used to carry large steel plates.
Overview
Process
Object
Details
Cause
Prevention

9. Cause of Accident Inappropriate lifting hook
When moving a steel plate with a crane, a lifting hook designed in-house (double chain, non-fixed) was used and this type of hook caused drooping and uneven loads, allowing the steel plate to become displaced from the hook.
Overview
Process
Object
Details
Cause
Prevention

10. Cause of Accident Lack of supervision during crane operation
Although there were risks of fall and moving objects, no work plan was prepared for carrying the steel plate with a crane, and supervision was not available to assist in hanging the chain.
Overview
Process
Object
Details
Cause
Prevention

11. Prevention of Accident
Proper lifting hanger
When a crane is used to carry a steel plate, a steel plate carriage clamp or lifting magnet among other lifting hangers should be used to secure the steel plate in place.
Overview
Process
Object
Details
Cause
Prevention

12. Prevention of Accident
Work plan for handling heavy objects
A work plan should be prepared to specify the shape and type of load, handling method and sequence, and work place’s width when a crane is used to handle heavy objects. Also, the work should be supervised to ensure that the plan is followed and the workers should receive safety training.
Overview
Process
Object
Details
Cause
Prevention

13. Thank You!