The Biomechanics Assessment of Musculoskeletal Disorders for Scaffolders
| Autor: | Chung-ming Lin, 林徵明 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 When scaffolders are working, they use several muscle gruops to twist at different angles and use different force. These act changes can be observe or assess by biomechnical detection equipment to record digital information, in order to find a correct way to improve the workers'' musculoskeletal discomfort symptoms. This research used an EMG instrument to analyse and assess the musculoskeletal disorders of ten professional scaffolders. They each have more than three years of scaffolding and eleven healthy college students, they have no previous experience ---(non-professional scaffolders). In this research, we found that these scaffolders were working in very narrow places and have to work in a confined space with restricted height for long period of time. At the same, they have to manouvre heavy metal scaffolds. All of the above reasons increase the risk of injury at work. As they are working in this limited space, they have to bend their wrists and strain their backs at an excessive angle. In muscle force, they primarily use the flexor carpiradialis. However, non-professional scaffolders used more power than professional scaffolders, this may be because they do not use their power in a correct way. From this research we know that the scaffolding assembly task causes both non-professional and professional worker’s Maximum Voluntary Contraction(%MVC ) over 35%. That is very dangerous to workers. However, when both of them disassemble the scaffold, their %MVC was higher than 35%. That is because when workers disassemble a scaffold, their wrist and back have to twist or bend at a more excessive angle than assembly. It will cause workers some injury: such as lower-back pain and muscle strain. Moreover, it may cause permanent muscle and bone injury. In conclusion, we know that a construction scaffolder is a high risk profession. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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