Seating at work: ergonomic selection and adjustment

Health and Safety Executive Process work (see figures 8 and 9) 50 If a job involves a series of tasks, the work can be arranged in a semicircle around the worker rather than in a straight line. A swivel chair can be provided so that all points on the semicircle can be reached from a sitting position. It is easier and quicker for the work to be at close hand; turntables, jigs and holders can all be used to ensure this. Chairs with a forward-tilting seat and backrest can provide support if the task requires reaching. Using a slightly sloping work surface or sloping component trays can also provide support as well as added comfort. Precision work 51 Workers on precision work which requires a great deal of concentration tend to lean forward and adopt a tense posture (also see figure 9). Chairs with a forward- tilting seat and backrest, and/or a work surface which slopes towards the worker help to avoid this problem and are recommended for this type of work. Keyboard work/visual display unit (VDU) work 52 Paragraphs 14 and 15 can be followed to check that seating for keyboard or VDU work is suitable. The Health and Safety (Display Screen Equipment) Regulations 1992 (see Appendix 1) and associated guidance provide further information. In general: n seating should be adjustable to allow the hands to work at elbow height. There should be room for the legs to fit comfortably under the desk (see figure 10); n armrests should not prevent the user from getting close to the workstation when using a keyboard or other input device (eg mouse); n it should be possible to place the feet flat and comfortably on the floor, otherwise a footrest should be provided; n the backrest should be adjustable and provide adequate support for the user. The small of the back should be supported by the chair and the shoulders should be relaxed. n Figure 8 Workstation where a series of tasks can be arranged in a semicircle Figure 9 Tilting seat - shown here with sloping worktop - to improve comfort and reach Seating at work Page 16 of 22