Analysis of Physical Workload and Biomechanics in the Construction of Roofs in Wooden Frames

ABSTRACT With the growing use of wooden frames in construction, particularly in the roofs, companies are concerned with workers quality of life and safety. The research aimed to analyze the physical workload (heart rate monitor) and posture (MICHIGAN methodology). The study was conducted in the municipalities of Alegre, Jerome Monteiro and São José do Calçado, located in southern Espírito Santo. Data was collected in three construction sites during the months of September 2010 to May 2012, analyzing 18 workers. In the analysis of physical workload, activities for the installation of trusses, purlins, rafters and battens, were classified as heavy, requiring rest times. Workers’ posture during the slats assembly favors injuries and requires the adoption of urgent ergonomic measures.

摘要：随着木结构在建筑领域，尤其是屋顶工程中的应用日益广泛，相关企业愈发关注作业人员的生活质量与作业安全。本研究旨在通过心率监测仪分析作业人员的体力负荷，并采用密歇根（MICHIGAN）方法评估其作业姿势。本次研究在位于巴西圣埃斯皮里图州南部的阿莱格里、热罗姆·蒙泰鲁与圣若泽杜卡尔萨杜三个市镇开展。数据采集工作于2010年9月至2012年5月期间，在三处建筑工地完成，共对18名作业人员进行了数据分析。针对体力负荷的分析结果显示，桁架、檩条、椽子及挂瓦条的安装作业被归类为重体力劳动，作业过程需安排必要的休息时段。作业人员在挂瓦条组装作业中的姿势易引发职业损伤，亟需采取紧急的人机工程学改进措施。