Work Surfaces

Copy Stand -- Use of a copy holder-instead of resting copy on the table top-helps eliminate strain and discomfort by keeping the copy close to the monitor and at the same height and distance from the user's face as the screen.

Bi-Level -- User comfort (and strain avoidance) dictate that the keyboard should be at a lower level than the screen so that the screen can be viewed comfortably and the keyboard used comfortably. The familiar arrangement of stacking the monitor on the computer while keeping the keyboard on the table top can be successful.

Another possibility is to use a special lower shelf for the keyboard. This may be especially useful when the table top is also needed as a writing surface-writing height for an individual is usually higher than that person's keyboard height.

Height -- Correct table height depends upon the user of a workstation and upon the chair and other factors that interact with the user and table. The ideal is for the user to be able to sit at the table with the keyboard in place and be able to easily maintain a 90 degree elbow angle and straight wrists while typing. The height of an adjustable keyboard support should adjust between 23" and 28" to accommodate most-but not all-users. 26" is a recommended compromise position, while leg clearance must still be considered.

Surface Area -- The table top should be big enough to allow space not only for all computer-related necessary equipment, but also for paperwork, books, and other materials needed while working at the computer. Working with materials on chairs and at odd angles has the potential for neck and other body strain. Frequently used items should be kept close to avoid long reaches. A general recommendation is that the table top should be at least as big as the standard office desk -- 30" by 60". A depth of at least 30" allows flexibility in use/reuse of the table. Usable space may be maximized by good wire/cable management.

Leg Room -- Knee spaces should allow a worker to feel uncrowded and to allow some changes of position -- even with the keyboard support lowered to the correct level for use. The knee space should be at least 30" wide by 19" deep by 27" high to comply with the requirements of the Americans with Disabilities Act. Leg clearance should be greater than the height of the thigh and knee of the largest person using the workstation; for those using a footrest, clearance must be calculated with the legs in place on the footrest. Likewise, depth of the "clearance envelope" for both knees and toes should be evaluated while the workstation user is in a normal working position at the table (determined by the design of the seating system and the way the user sits). Drawers and support legs (for furniture) should not go where human legs need to fit.

Footrests -- Situations will arise in which a user is perfectly adjusted for keyboard use and with the monitor at a correct angle, but her/his feet do not rest flat on the floor.  A footrest may be used to correct this problem.

Edges -- Table edges should be smoothed or rounded to avoid discomfort on the part of the user as hands, arms, and wrists contact the table.

Construction -- Sturdily built tables help avoid irritating vibrations.

Surfaces -- Medium and light-colored surfaces may help avoid excessive contrast with printed materials. A non-shiny surface is recommended to help in reducing glare.

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