What are the basic criteria for an ergonomically designed chair?
When an employee spends six to eight hours in the chair, the height of the chair and the work surface are critical. The human body dimension that provides a starting point for determining correct chair height is the “popliteal” height. This is the height from the floor to the crease behind the knee. The chair height is correct when the entire sole of the foot can rest on the floor or a footrest and the back of the knee is slightly higher than the seat of the chair. This allows the blood to circulate freely in the legs and feet. Armrests: Armrests should be large enough to support most of the lower arms but small enough so they do not interfere with chair positioning. Armrests should support your lower arms and allow your upper arms to remain close to the torso and made of soft material and have rounded edges. Backrests: Backrests should support the entire back including the lower region. The seat and backrest of the chair should support comfortable postures that permit frequent variati
