The health risk assessment of musculoskeletal disorders for cement masons

• Main Authors: Kuang-fon Lee, 李光豐
• Other Authors: Miin Chiu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/17729995341161563274

碩士 === 大仁科技大學 === 環境管理研究所 === 96 === To evaluate the health risk of Cement masons personnel in by questionnaires、survey and monitoring.These samples were collected from cement masons who had full more than one year work experience and complete a self-reported unwell questionnaire,recording image for whole work periods and let 18 cement masons wear electromyogram who volunteers to participate actual measurementto examine the variation of each muscles %MVC and wrist angles during work period. The prevail rate of musculoskeletal disorders from the NMQ questionnaire was 98.95% and unwell body parts are Low-back/waist（51.1%）、right shoulder（48.9%）、right wrist（34.0%）、neck（31.9%） and upper back（19.1%）。The maximal voluntary contraction of four different muscles was monitored by the electromyogram in whole shift for cement masons. The result showed %MVC value was higher than 40% in whole work period(material handling、transfer materials、spading、agitating、daubing). And the arms repeats operative frequency were over 20 times while daubing the wall, as a result cause high prevalence of the right hand elbow-wrist. Because the arm often needs to encourage to exceed shoulder, causing right shoulder unwell prevalence be up to 51.1％.The highest unwell prevail of musculoskeletal is Low-back /weist,the main reason is most of the cement masons doing the manual material handing in awkward posture and carry on spread ground bricks need to bend from the waist at work for a long period, with the result that there are more than half the labors having a low back pain symptom occurred.