Additional Information about: [Backrest] [Height] [Seat Pan]
Backrest
A proper backrest should:
- support the entire back including the lower region and provide a comfortable posture that permits frequent variation in a sitting position.
- have the backrest angle and height easily adjustable. The backrest should be able to tilt at least 85 degrees to 100 degrees while still able to maintain at least a 90 degree sitting angle.
- have range height of 16-20 inches from the seat pan and at least 13 inches wide.
- have sufficient tension to provide adequate support for the lumbar area as well as the middle and upper back.
- have a lumbar support that protrudes 1-2 inches and runs across the backrest. The width of the lumbar support should be at least 12 inches and the height of the lumbar support (measure at the center of the lumbar support) from the seat should be adjustable to a range of 6-10 inches. A range of adjustability of more than 3 inches is desirable if the lumbar support height is adjustable.
