Abstract
A simulated drywall plastering task was used in this study to evaluate the potential health and safety benefits of using a pneumatic drywall finishing system. The plastering task was performed in a controlled job setting. Muscular exertion while performing the plastering task was measured using electromyography (EMG). Usability questionnaires were given to all participants. Mixed findings were observed for the EMG dependent variables. Significant reduction in the number and duration of muscular rest and static load level were observed for the left forearm flexor muscles when working with the pneumatic tool. However, significant increase in the median and peak load level were observed in the right forearm flexor muscle when working with the Apla-Tech pneumatic tool. The usability questionnaire indicated that a majority of the workers preferred the pneumatic tool. The use of ladders and rolling scaffolds was reduced when working with the pneumatic tool because the tool allowed all workers to reach higher corners and ceiling height. Based on the EMG measures, tool preference and reduction of risk of traumatic slips and falls indicate that the pneumatic tool is an effective tool for applying compound onto drywall joints. Further studies in the field setting to verify the effectiveness of the pneumatic tool should be conducted.