Assessment of Construction Worker’s Working Posture and Work Load－A Case Study on Form Assembly Work

• Main Authors: Huang-Hsien Chen, 陳皇賢
• Other Authors: Tao-ming Cheng
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/37125423099162697914

碩士 === 朝陽科技大學 === 營建工程系碩士班 === 97 === Workers have to execute works in continuously repeated actions or postures in a construction environment. Such condition has made the workers vulnerable to injuries in relating to muscles and bones. According to previous studies on physical energy metabolism, it was found that energy consumption continued increasing once a person was involved in the works consuming physical strength. Energy consumption varies based on workload while workers are doing their jobs. Previous studies in relating to the hazards brought by the construction industry mostly focused on working posture endangerment grading and on bringing up suggestions and improvement methods. As a result, no survey and discussions have been made on energy consumption at work. Therefore, this study tends to propose the posture endangerment grade evaluation and energy consumption assessment at work. The related conclusions and suggestions are also made according to the results obtained in this paper and serve as a reference for follow-up researchers and a guide for futher study. This study mainly explores working posture endangerment and workload while executing form assembly. On-site shooting and heart rate measurements were made upon executions. OWAS and REBA were applied to evaluate working posture endangerment. The software, Viewlog, was used to analyze heart rates. According to the OWAS and REBA evaluation on working postures, those dealing with columns, walls and plates ranked the top three hazards while taking various types of form assembly into consideration. In this study, it was hypothesized that there were or were no significant differences between heart rates categorized by the three types of form assembly under normal conditions. The results proved that there were no significant differences in fatigue rating influenced by the above mentioned three types of form assembly. Finally, the correlation between the posture endangerment grade evaluation and heart rates was explored via statistical correlation analysis. The results showed that the correlation function indicating the correlation between OWAS and REBA posture evaluation systems and the average heart rates is close to zero. Therefore, it was found that no significant correlation between posture endangerment grading and working energy consumption was shown in the construction industry.