Chair size design has a lot to do with body size, before you understand the size of the chair, you must first understand the following concepts: body size, sitting height, sitting depth size, sitting width size and sitting tilt.
What is body size?
The size of the human body can be divided into static size of the human body and dynamic size of the human body. Static size of the human body has a greater relationship with objects directly related to the human body, such as furniture, clothing, equipment, etc., mainly for a variety of furniture, equipment to provide data;
Sit tall in size
Sitting height refers to the vertical distance from the seat surface and the ground, because the chair surface is often tilted back, the chair sitting height is usually the previous sitting height as the chair sitting height. Proper sitting height: Keep your thighs horizontal, your calves vertical, and your feet flat on the ground.
Seat depth dimensions
Sitting depth refers to the front to back edge distance of the chair surface, and the depth of sitting depth has a great influence on the comfort of the human body’s sitting position. If the chair sits deeper than the horizontal length of the thigh, the upper back of the human body will have a great tilt, while the waist lacks support points and hovers, aggravating the strength of muscle activity in the waist and causing fatigue, while sitting too deep, so that the knee socket produces a numbing reaction, and is not conducive to standing up. China’s human sitting position of the average thigh horizontal length: 445MM for men, 425MM for women, and then ensure that the sitting edge away from the knee inside a certain distance (about 60MM), so that the general sitting depth size between 380 to 420MM.
Seat wide size
The width of the chair seat is based on the person’s sitting position and movement, often in the shape of the front width and back narrow, the front width of the sitting surface is called the front width, and the width of the back edge is called the width of the back. Sitting width is generally not less than 380MM, for armchairs, to consider the human arm of the armrest,to the inner width of the armrest as the size of the seat width, according to the average shoulder width size of the human body plus an appropriate balance, generally not less than 460MM, but also should not be too wide, should be the comfortable posture of the natural arm shoulder width.
The chair is tilted
Sitting tilt: When a person is resting, the sitting position is tilted back, so that the lumbar spine has a support, so the general sitting surface is mostly designed to tilt back. The seat is generally tilted 3 to 5 degrees, and the opposite chair back is tilted back.
Back-to-back dimensions
The height and width of the backrest of the chair, the maximum height of the backrest can reach 480 to 630MM, the maximum width can reach 350 to 480MM. The size of the backrest is mainly related to the height from the bottom of the hip to the shoulder (decided to be high on the back) and the width of the shoulder (determined by the width of the back).
the height of the armrest
According to the human body scale, the vertical distance from the surface of the armrest to the sitting surface is more suitable when 200 to 250MM, while the front end of the armrest is slightly raised, with the tilt angle of the seat and the change of the basic back slope, the handrail tilt is generally 10 to 20 degrees, while the horizontal angle of the armrest is ±10 degrees, generally consistent with the shape of the sitting surface.
Table chair size
Table chair size selection is generally divided into square table chair or open and close table chair size or round table table chair size selection, to be considered separately according to the size of the dining table.
Common sizes are: (1) table height: 750-790mm; 450-500mm; (3) Round table diameter: two people 500mm, two people 800mm, four people 900mm, five people 1100mm, six people 1100-1250mm, eight people 1300mm, ten people l500mm 12 people 1800mm; (4) square table size: two people 700×850 (mm), four people 1350×850 (mm), eight people 2250×850 (mm) ;(5) table turntable diameter; 700—800mm。 Distance: (where the seat is 500mm) should be greater than 500mm. (7) Main channel width: 1200-1300mm. (8) Internal work width: 600-900mm.
