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Manual Material Handling (MMH) is a risky activity that causes low back pain and has become a worldwide phenomenon, not only in developed countries, but also occur in developing countries. One effort to reduce the injury caused by MMH is the Reccomended Weight Limit (RWL) equation, published by NIOSH. However, NIOSH equation is more tested and researched in European and America. Therefore, it is necessary adjustment for Indonesia people. In this paper, the author analyze the vertical multiplier factor in NIOSH equation for male workers in Indonesia. Multiplier factor is assessed using three criterias. There are biomechanics, physiology, and psychophysical. The result of this study is form of vertical multiplier equation, i.e VM = 1 - 0.0310083 (68-V) and VM = 1 - 0.00708215 (68-V) for an elevation below the knuckle.

advanced engineering forum

Analysis of Vertical Multiplier on Revised National Institute for Occupational Safety and Health (NIOSH) Lifting Equation for Male Workers in Indonesia Industry