Some tips on dining tables and chairs
If the dining table and the dining chairs are not matched, it will make people uncomfortable to sit; the writing table is too high or the chair is too low, which will make people form a prone posture, shorten the sight distance, and easily cause spinal curvature and deformation over time. To this end, the furniture used for daily use must meet the standard.
For the height of tables and chairs, there are national standards. Among them, the height dimension standard of table furniture can have four specifications of 700mm, 720mm, 740mm and 760mm; the seat height of chair and stool furniture can have three specifications of 400mm, 420mm and 440mm. In addition, it also stipulates the standard size of tables and chairs, and the height difference between tables and chairs should be controlled within the range of 280 to 320 mm.
The correct height of the desk and chair should enable people to maintain two basic verticals when sitting: First, when the feet are flat on the ground, the thighs and calves can be basically vertical. At this time, the front edge of the seat surface cannot compress the lower plane of the thigh. The second is that when the two arms hang down naturally, the upper arm and the forearm are basically perpendicular, and the height of the desktop should just be in contact with the lower plane of the forearm. This allows people to maintain the correct sitting and writing posture.
If the height of the table and chairs is unreasonably matched, it will directly affect the sitting posture of the person, which is not conducive to the health of the user. To this end, the national standard also stipulates that the height of the space under the desk surface is not less than 580mm, and the width of the space is not less than 520mm, which is to ensure that people can have enough space for their legs when using.
As for the size of sofas, the national standard stipulates that the front width of a single sofa seat should not be less than 480mm. If it is smaller than this size, even if people can barely sit in, they will feel cramped. The depth of the seat surface should be in the range of 480 to 600mm. If it is too deep, the calf will not sag naturally, and the calf will be oppressed; if it is too shallow, you will feel unable to sit. The height of the seat surface should be within the range of 360mm to 420mm. If it is too high, it will feel uncomfortable when sitting on a chair; if it is too low, it will be difficult to sit down and stand up.
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