International Journal of Safety

The Korean Society of Safety (한국안전학회)
권호 표지

Effect of Trunk and Upper Arm Angle on Lifting Capacity

  • Received : 2011.03.02
  • Accepted : 2011.06.12
  • Published : 2011.06.30
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Abstract

Lifting capacity and difficulty of task are influenced by body posture. In RULA and REBA, the body was divided into segments which formed two groups, A and B. Group A includes the upper and lower arm and wrist while group B includes the neck, trunk and legs. This ensures that whole body posture is recorded so that any awkward or constrained posture of the legs, trunk or neck which might influence the posture of the upper limb. This study aimed to measure MVC (maximum voluntary contraction) and subjective judgment in psychophysical method (Borg's scale) according to trunk and upper arm angle and to analyze results statistically. The results of this study were that lifting capacity was more influenced by interaction of body posture rather than angles of each part, and MVC variation according to trunk and upper arms angles should different patterns. This means that we consider the interaction of trunk angles and upper arm angles when we access risk factors of the postures. This survey would be also the basic data to evaluate difficulty of lifting tasks according to body postures ergonomically.

Keywords

References

  1. Borg, G., Psychophysical of Perceived Exertion Med. Sci. Sports and Exercise, vol. 14, pp. 377-381, 1982.
  2. Borg, G., Psychophysical Scaling with Application in Physical Work and the Perception of Exertion, Scand. J., Work Environment Health, vol. 16, supply 1, pp. 55-58, 1990. https://doi.org/10.5271/sjweh.1815
  3. Burdorf, F. J., Govaert, G., and Elders, L., Postural load back pain of workers in the manufacturing of prefabricated concrete elements, Ergonomics, vol. 34, pp. 909-918, 1991. https://doi.org/10.1080/00140139108964834
  4. Chang, S.R., Bae, D., and Kim, Y., Ergonomics program in DSME, 2006.
  5. Chang, S.R. and Bae, D., Ergonomic intervention in LG electronics company, 2006.
  6. Hazard Evaluation System and Information Service, A physician's Guide to the California ergonomics standard, Hazard Evaluation System and Information, 2001.
  7. Heinsalmi, P., Method to measure working posture loads at working site (OWAS). In: E. N. Corlett, J. Wilson, I. Manencia, (Eds.), The Ergonomics of Working Postures, Taylor & Francis, London, pp.100-104, 1986.
  8. Hignett, S. and McAtammey, L., Rapid Entire Body Assessment (REBA), Applied Ergonomics, vol. 31, pp. 201-205, 2000. https://doi.org/10.1016/S0003-6870(99)00039-3
  9. Karhu, O. and Kuorinka, I., Correcting working postures in industry : A practical method for analysis, Applied Ergonomics, vol. 8, pp.199-201, 1977. https://doi.org/10.1016/0003-6870(77)90164-8
  10. Lim, H.K., Chang, S.R. and Lee, K., Ergonomic intervention in Ssangyong motor company, 2004.
  11. Lim, H.K., Chang, S.R., Lee, K., and Kim, Y., Ergonomic intervention in Samsung heavy industry, 2006.
  12. McAtammey, L. and Corlett, E.N., RULA : a survey method for the investigation of work-related upper limb disorders, Applied Ergonomics, vol. 24, pp.91-99, 1993. https://doi.org/10.1016/0003-6870(93)90080-S
  13. Tzu-Hsien, L., Static lifting strengths at different exer-tion heights, International Journal of Industrial Ergonomics, vol. 34, pp 263-269, 2004. https://doi.org/10.1016/j.ergon.2004.04.006
  14. Waters, T.R., Putz-Anderson, V., Garg, A. and Fine, L.J., Revised NIOSH Equation of the Design and Evaluation of Manual Lifting Tasks, Ergonomics, vol. 36, pp. 749-776, 1993. https://doi.org/10.1080/00140139308967940
  15. Waters, T.R., Putz-Anderson, V. and Garg, A., Applications manual for the revised NIOSH lifting equation, Cincinnati, OH: DHHS (NIOSH), 1994.