The Influences of Slope and Slipperiness on Subjective Rating of MMH

Abstract:

This study investigated the influence of slope and floor slipperiness on subjective rating of manual material handling (MMH), and identified the consistence between the subjective rating and objective measurement of floor slipperiness under various physical workloads. The COF measurements under slopes (0 ̊~10 ̊), three different floors and two surface conditions were conducted in this study. Thirty adults were recruited to carry four kinds of loads (0~15 kg) and walk on the slope. A survey was immediately conducted to obtain their rating of perceived exertion and perceived sense of slip while handling the loads. The results showed that the influences of gender, slopes, and loads on subjective ratings were significant statistically. The correlation between subjective rating and objective measurements of slipperiness was significantly high. Furthermore, the results also suggested that the floor materials should be selected to avoid the slip accidents. The limitations of slope and load also should be considered for different gender to prevent the disorders on the slopes for MMH tasks. As a result for obtaining the rating of perceived exertion, it was suggested that the combinations of slope angle and load are 5o and 15 kg for male and 5oand 10 kg for female.

• Periodical: Advanced Materials Research (Volume 1028)
• Pages: 321-326
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1028.321
• Online since: September 2014
• Authors: Yao Wen Hsu*, Lieh Chen
• Keywords: MMH, Rating of Perceived Exertion, Slipperiness, Slope, Subjective Rating

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