Suzhou Office Chair Standard

The Suzhou office chair standard primarily refers to general ergonomic principles and national standards, with core dimensions and requirements as follows:

1. Seat Height
Seat height is a key parameter affecting sitting comfort, with a standard range of 400-500 millimeters, and it is recommended to have adjustable functionality. This design can accommodate people of different heights, ensuring that the user's thighs are basically parallel to the ground when seated, with feet firmly on the ground, avoiding blood circulation obstruction caused by suspension or excessive bending. For example, people with a height of 160-180 centimeters can find the most comfortable sitting posture by adjusting the seat height.

2. Seat Depth and Seat Width

• Seat Depth: Refers to the horizontal distance from the front edge of the seat to the backrest. It should be based on the data of smaller-bodied individuals (such as women or teenagers) to ensure that most people's lower backs can touch the backrest and receive support. If the seat depth is too long, it may cause the waist to be suspended; if it is too short, it restricts leg movement space.
• Seat Width: It should refer to the data of larger-bodied individuals to ensure sufficient lateral movement space. Some models are designed with a seat width of 57 centimeters, which can accommodate users of different body types and avoid a sense of confinement during long sitting.

3. Backrest Height
The reference range for the backrest height of office chairs for work is 46-61 centimeters, with the design goal of effectively supporting the lower back area, especially the lumbar spine. The backrest should conform to the natural S-shaped curve of the spine, dispersing pressure by fitting the back's contour and reducing fatigue from prolonged sitting. For example, a medium-high backrest design can support both the thoracic and lumbar spines, suitable for long-term office scenarios.

4. Armrest Height
The standard armrest height is 21-22 centimeters, and its function is to provide elbow support when the user's arms hang naturally, relieving shoulder and neck pressure. If the armrests are too high or too low, it may cause the arms to be suspended or the shoulders to be shrugged, which can easily lead to muscle strain with long-term use.

5. Desk-Chair Matching Dimensions
The height difference between the desk and the chair should be controlled within the range of 280 to 320 millimeters. This proportion can maintain a natural and relaxed arm posture for work, avoiding arm elevation or lowering caused by an excessive height difference, which in turn can lead to shoulder, neck, or wrist fatigue. For example, an office chair with a seat height of 45 centimeters should be paired with an office desk that is 73-77 centimeters high.

Additional Requirements
The dimensions of office chairs should comply with the national standard GB/T 38733-2020 Office Furniture - Office Chairs - Dimension Measurement Methods. When measuring, use tools with clear graduations (such as steel tapes) and ensure that the tape is tightly attached to the object being measured to reduce errors and ensure data accuracy.