The evaluation of a hand-handle interface tool (HHIT) for reducing musculoskeletal discomfort associated with the manual handling of gas cylinders

This paper reports the evaluation of a tool designed by the workforce to reduce the physical strain imposed by the manual handling of gas cylinders. The design of this tool had not been subject to ergonomics during its participatory design. The aim of this case study was to assess the potential benefits of using such a manual handling tool for gas cylinder deliveries and to investigate any potential problems associated with the use of the tool. Questionnaires, diaries, video observations, goniometer and force measurements were used in the workplace and the laboratory to assess the tool with respect to usability and any musculoskeletal discomfort on 20 male delivery drivers. The tool showed few benefits for delivering gas cylinders underground and the tool may increase physical strain. It is recommended that participatory groups use expert ergonomic knowledge and methods to redesign the job as a priority measure before designing and implementing tools that attempt to reduce the physical strain of manual handling gas cylinders.