Design guidance for furniture sitting heights

Design guidance for furniture sitting heights

The sitting height of furniture refers to the vertical distance from the front edge of the sitting surface to the ground, that is, the height of the front edge of the sitting surface. Sitting height is one of the most important factors affecting sitting comfort, and it is also the benchmark for determining a series of scales such as backrest height, armrest height and table top height.

Unreasonable sitting height will lead to unscientific sitting posture, which is easy to cause fatigue in the human waist. If you sit too high, your feet will hang in the air, which will compress the soft tissues in the front half of the thigh near the knee fossa, and the blood circulation will be poor, and the tendons will be swollen and numb.

Sitting too high, arching the knees, not being able to provide support if the thighs do not touch the chair, and the body pressure is too concentrated in the ischial tuberosity, which will cause pain after a long time; At the same time, the human body forms a forward bending posture, which will increase the load on the back muscles, and the center of gravity is too low, which will cause difficulties when getting up, especially for the elderly.

Proper sitting height can make the human body reach a relaxed and natural state. The national standard GBT326 stipulates that the sitting height of general seats is 400~440mm, and the sitting height requirements are different for seats with different uses. Generally, the sitting height of the work chair is higher than that of the rest chair, and it is mostly designed to be adjustable in height, and the adjustment range is 50~460mm, so as to meet the needs of people of different heights.

The height of the rest chair (such as sofa, recliner, etc.) can be slightly lower so that the legs can be stretched forward and leaned back, which is conducive to the natural state of the spine and the relaxation of muscles, and also helps to stabilize the body. The sitting height of the sofa is generally 360~420mm; When the stool height is 400mm, the back muscle mobility is the largest, that is, the most prone to fatigue, so the stool height should be slightly higher or slightly lower than this value.