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Volume 6, Issue 4 ( Iranian Journal of Ergonomics 2019)                   Iran J Ergon 2019, 6(4): 46-57 | Back to browse issues page


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Habibi E, Mirsalimi E, Darabi F, Ebrahimi K. A Survey lifting the cylindrical things and comparing them with the NIOSH lifting index. Iran J Ergon 2019; 6 (4) :46-57
URL: http://journal.iehfs.ir/article-1-616-en.html
1- Professor, Department of Occupational Health, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
2- Graduate Student, Department of Occupational Health, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran , emad.mirsalimi@ymail.com
3- Graduate Student, Department of Occupational Health, School of Public Health, Shiraz University of Medical Sciences, Shiraz, Iran
4- Graduate Student, Department of Occupational Health, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract:   (6805 Views)
Background and Objectives: This study focused on lifting drill rods. Drilling is a repetitive and heavy mining operation with a high incidence and severity of musculoskeletal injuries. The purpose of this study was to examine how to lift a vertical drill bit (1.61m and 35kg in height) using two types of rod height and four feet positions, and finally compare them with the Lifting Index (LI).
Methods: Seven workers participated in this study. Each person raised a rod and held it vertically. Reflective markers were installed on each person, and from three cameras and an Ergo-meter plate for record forces and Movement of the limbs. In this case, four positions of the foot and pressures on the lower back were Investigated (position0=to the rod, position45=diagonally to the rod, position90=right side of the bar and free posture). In addition, two positions of the height of the rod were Investigated, at the first, the end of rod was on the ground (height of the rod was 83 m), and in the following the end of rod was on the Basket with height 20cm (rod height of 1.03 m).
Results: The Lifting Index (LI) for each person was equal to 1.4 in the NIOSH lifting equation. It was found that the vertical height of the rod had the greatest effect at the load on the lower back. Some workers use techniques that endure less pressure on their waist.
Conclusion: Finally, it was found that the asymmetric loading Condition (90 ° angle) was the worst case compared to the Lifting index and NIOSH standard.

 
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Type of Study: Research | Subject: Other Cases
Received: 2019/02/19 | Accepted: 2019/06/8 | ePublished: 2019/06/8

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