Liaocheng Office Chair Specifications

The specifications for office chairs in Liaocheng should be considered in combination with specific procurement requirements and general standards, with core parameters including size, functional adaptability, and ergonomic design.

I. Specific Specification Requirements for the Procurement Project of Liaocheng Wenxuan Junior High School
According to the school's procurement standards for teachers' office chairs, the chairs must strictly adhere to ergonomic principles, with specific parameters as follows:

• Seat Cushion Thickness: Not less than 80mm, ensuring comfort during prolonged sitting and distributing pressure on the buttocks;
• Height from the Ground: Not less than 500mm, compatible with standard office desk heights (700-760mm), preventing shoulder and neck fatigue caused by sitting too high or too low;
• Seat Cushion Dimensions: Width not less than 500mm, depth not less than 500mm, providing sufficient support area to prevent thighs from hanging or pressure on the back of the knees.

II. General Specification Ranges for Conventional Office Chairs
In addition to specific procurement requirements, the specifications for conventional office chairs should meet the needs of different usage scenarios and user groups, with core parameters as follows:

• Seat Height: 400-550mm, compatible with standard office desk heights, ensuring users' legs hang naturally and feet rest flat on the ground;
• Seat Depth: 400-500mm, supporting the length of the thighs, preventing pressure on the back of the knees, and accommodating users of different body types;
• Seat Width: 450-600mm, providing ample lateral space to ensure comfortable sitting, especially suitable for users with wider body types or shared use scenarios;
• Backrest Height: 500-700mm, covering the lumbar to thoracic regions of the body, with some high-end models featuring adjustable lumbar supports for precise spinal support;
• Armrest Height: 200-300mm, coordinated with desk height to allow natural arm placement and reduce shoulder pressure.

III. Core Principles for Specification Selection

1. Ergonomic Fit: Prioritize matching seat height and depth with the user's height, e.g., users under 170cm in height are recommended to choose chairs with a seat height of 400-450mm;
2. Functional Requirements: Select additional features based on usage scenarios, such as focusing on adjustable lumbar support and breathable mesh fabric for prolonged office work;
3. Space Constraints: In limited office spaces, balance seat width with available movement space to prevent chairs from being too large and obstructing passage.

The above specifications serve as general references, and specific procurement or selection should be based on actual needs, budget, and usage scenarios for comprehensive evaluation.