Fall of Steel Plate Displaced from Hook during Carriage 2010-교육미디어-1024 Safety–Training Media Dev. 2009-5-21 Grave Accident Case (Manufacturing) Fall of Steel Plate Displaced from Hook during Carriage

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 The copyright of this material is owned by the Korea Occupational Safety and Health Agency (KOSHA) and unauthorized and arbitrary use hereof is strictly prohibited. However, if an individual wishes to use it for a non-commercial objective, he/she may use do so by revealing its source. If a corporation wishes to use it, permission must first be obtained from KOSHA. Any unauthorized use hereof constitutes a breach of copyright law and such action is subject to legal sanctions.

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

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

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

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

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

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

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

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

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

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

Thank You!