Kinesis KB210USB Adjustable Ergonomic USB/PS2 Keyboard - Manual (Page 21)

21
If you like to sit forward, try it now. If you must tuck your feet in or stick them out in
front of you, consider raising your chair. If you feel the chair seat gives too much,
consider tightening your chair’s tilt tension. When you have adjusted your chair, take a
look at the standard ranges recommended by ANSI. Compare the position of your chair
with the ANSI ranges.
ANSI-Recommended Seating
1. Seat height should range from 16” to 20.5”. This refers to how high the chair seat
should be with a person’s weight pressing on the cushions.
2. Seat depth for chairs with rectangular cushions or chairs made of hard materials
should range from 15” to 17”. Seat depth refers to the distance from the front edge
to the back edge of the seat cushion. Seat depth can be greater if the front edge of
the seat is soft or curved.
3. Seat width should be at least 18.2” measured across the middle of the seat. Seat
width refers to the side-to-side distance across the seat cushion.
4. Distance between armrests should be at least 18.2” measured between the inner
edges of the armrests.
5. The backrest should be at least 12” wide in the lower back area. Now go on to
adjusting your work surface.
Adjusting your work surface
The proper height of the work surface is related to the clearance you have beneath it to
accommodate your legs while in a seated position.
1. Pull up to the work surface while seated. With your feet flat on the floor, adjust the
height of your work surface so that your knees do not bump the edge of the work
surface, pencil drawer, or keyboard support tray (when the tray is in its working
position). The tops of your thighs should not touch the underside of the work
surface.
2. When pulled up to the work surface, your feet or knees should not bump against
the back of the work surface or wall supporting the work surface.
3. Swivel to grasp something within easy reach on your work surface. You need
enough clearance beneath your work surface to move freely. Your knees should
not bump against storage drawers or support brackets.
4. While sitting in an upright position, your forearms should rest comfortably on the
work surface.
If the height of the work surface causes your shoulders to be raised up or hunched,
consider lowering your work surface. If you must slump or hunch over your work
surface, consider raising it so that you can work in a comfortable, upright position.
Check the height of your work surface against the standards recommended by ANSI.
According to ANSI