A Study on the Preventive Measures against Fall Injuries in Manufacturing Industry Focusing on the Portable Ladders

이동식 사다리를 중심으로 한 제조업에서의 추락재해 예방대책 연구

  • Kim, Hyung-Seok (Occupational Safety and Health Research Institute, KOSHA) ;
  • Lee, Seok-Won (Occupational Safety and Health Research Institute, KOSHA) ;
  • Jung, Won-Jae (Occupational Safety and Health Research Institute, KOSHA) ;
  • Ryu, Bo-Hyuk (Occupational Safety and Health Research Institute, KOSHA)
  • 김형석 (한국산업안전보건공단 산업안전보건연구원) ;
  • 이석원 (한국산업안전보건공단 산업안전보건연구원) ;
  • 정원제 (한국산업안전보건공단 산업안전보건연구원) ;
  • 류보혁 (한국산업안전보건공단 산업안전보건연구원)
  • Published : 2009.12.31


The injuries as a result of fall accidents is the one of the most common kind of injuries in Korea, especially fall from height is the top most common kind for fatal injuries. Futhermore, the number of fall injuries in manufacturing industry has been steadily increasing from 2000 to 2007. In 2007 the number of fall fatal injuries increased 10.6 % in comparison with the number in 2006. These numbers are 6~17 times higher than those for foreign countries such as the U.K and the USA. So, it is needed to make a study to reduce these numbers for manufacturing industry. To get the goals, we did research as followings. First, this study analyzed statistics by industry, by fall height, by common agent and so on to gain an insight into real aspect of fall injuries. It showed that ladder is the commonly cited agent for manufacturing industry, and 3 risky activities ; the ladder work, the load/unload work, and the maintenance work. Secondly, this study made a survey of manufacturing workers for their understandings of the most 3 risky activities. It showed that 'tendency to work easily' and 'difficulty of applying measures due to inherent working conditions' are main reasons for workers not to implement the preventive measures against the fall accidents. Thirdly, this study tested the slip characteristics of ladder base and lungs. The tests were done based on ANSI standard and KS. In addition to the standard condition, this study performed slip tests in wet and sandy conditions and compared the results with the those of standard condition. It showed that friction coefficient is standard condition > wet condition > sandy condition, and the friction coefficient of ladder for sandy condition is measured to be reduced by 63.9% compared with that for standard condition. Finally, this study developed safety work models for using of portable ladders in consideration of the safety standards of foreign countries such as the U.K, the USA, and the Australia.


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  2. 산업재해현황통계자료('00-'07), 노동부
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  7. U.S Department of labor, U.S. Bureau of Labor Statistics, 2008
  8. United States Department of labor, National census of fatal occupational injuries in 2006