28 Dec Basic Office Ergonomics
Whether you work at a desk or in an office cubicle, workstation ergonomics are critical to establishing and maintaining a healthy and productive work environment. (The following information and above graphic came from Ergonomic University found on the Office Master website).
1. Monitor Height – Place top edge of screen at eye level. – This can be achieved using an adjustable monitor arm, or monitor stand.
2. Wrist Postures – Keep wrists flat with little or no bending. This can be achieved using an adjustable keyboard platform.
3. Mouse Placement –Place at same level of keyboard and as close to sides as possible. See #2 above – a proper keyboard platform will have a “mousing area”.
4. Thigh Position – Keep thighs parallel to floor. A well designed ergonomic office chair will have a “seat slider”, which allows the depth of the seat to be independently adjusted (to accommodate for shorter or taller users).
5. Document Holder – Place document at same level as monitor. Avoids neck strain – a document or “paper-holder” can integrate into the monitor stand in #1 above, or can be a separate piece of equipment.
6. Feet Position – Place feet flat on floor or footboard. This one gets tricky, because if shorter users adjust the height of their chair lower, it can throw off monitor height and keyboard position. A foot-rest can be used to achieve this position.
7. Monitor Distance – Keep at proper distance for screen size.
The Work Chair – Ultimate Test For Fit
1. Seat Height – Users should be able to sit with their feet comfortably on the floor or footrest without undue pressure on the underside of the thighs. The thigh-to-torso angle should not be less than 90°.
2. Seat Depth – Users should be able to sit in the chair without undue pressure against the back of the knees, their back properly supported by the backrest and with adequate buttock and thigh support.
3. Seat Width – The seat should be wider than the hip breadth of the user with allowance for movement and clothing. The seat width should not limit the ability to use the armrests comfortably.
4. Seat Pan Angle – This should allow users to support their feet on the floor or footrest. They should not cause the user’s torso-to-thigh angle to be less than 90°. Forward seat pan angles should not cause users to shift excessive weight to their feet or experience the sensation of sliding out of the chair.
5. Back Support :
Seat Backrest Height:
All backrests should provide adequate lumbar support and buttocks clearance. For tasks requiring upper body mobility, the backrest should not interfere with the user’s movement. For users who prefer reclining postures or greater upper back support, the back height should provide support for the shoulder blades.
The width of the backrest should provide adequate support for the curvature of the user’s back without causing localized pressure points.
The height and shape of the lumbar support should coincide with the lumbar curve (“the small”) of the user’s back. The support should be firm, but not cause localized pressure points.
6. Movements of the Seat Pan and Back Support – The user should be able to sit in a position where the torso-to-thigh angle is equal to or greater than 90°. The seat and backrest angles should accommodate the varying postures assumed by the user throughout the day.
7. ARM SUPPORT
This should allow users to sit in a variety of postures while supporting their forearms and/or elbows in a manner that avoids lifting the shoulders (armrests too high) or leaning to the side to reach the armrest (armrests too low). The armrest height should allow accessibility to, and performance of, tasks.
The length of the armrest should allow users to sit close enough to the work surface to perform their tasks while maintaining contact with the backrest.
Inside Distance Between Armrests:
Armrests should allow users to sit in a variety of postures while supporting their forearms in a manner that avoids lifting the shoulders and/or excessive outward positioning of the elbows. Armrests should allow accessibility to, and performance of, tasks. The inside distance between the armrests should allow the user to enter and exit the chair easily. The hips should comfortably fit between the armrests or supports.