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Production process in the construction industry is mostly done by human labour in many manual material handling activities ranging from transportation, machine set-up, and workpiece arrangement. At our subject company, 33 workers have complaints about muscle parts, which are commonly referred to musculoskeletal complaints. NBM questionnaire is used to subjectively assess musculoskeletal muscle disorders. The method used is RULA, which targets upper body posture. The results shows that musculoskeletal complaints of the workers vary from low to high, mostly in the upper body parts. Whereas with the RULA method, it needs to improve the activities that have high scores of 7, that is when welding wire is lifted, and when the welding position is 3G and is 4G. Moreover, activities that need to be improved are those with high scores of 6, which when setting up the welding machine, and during the welding process 2G. Keywords—musculoskeletal complaints; postural stress; work

Musculoskeletal and Postural Stress Evaluation as a Basic for Ergonomic Work Attitudes on Welding Workers