Office Chair Load Capacity

The load capacity of office chairs varies depending on the model, design, and certification standards, typically ranging from 100kg to 250kg, with some high-end models exceeding 400kg.

I. Differences in Load Capacity Among Specific Models

The load capacities of office chairs vary significantly across different brands and models, primarily depending on material strength and structural design:

1. Basic Office Chairs: Most models from brands like Deli and NetEase Yanxuan can support a maximum load of around 120kg, suitable for everyday office use.
2. Mid-to-High-End Ergonomic Chairs:
   • Products from the Gedeli Furniture Flagship Store feature a "reinforced explosion-proof chassis + steel five-star base," with a tested load capacity of 130kg;
   • The Sihoo C300 is officially rated for a 150kg load, with user feedback indicating no wobbling even after prolonged sitting for 200 jin (100kg);
   • The Hebiao Diao X7 achieves 100kg load stability through a "four-stage gas lift + reinforced aluminum alloy five-star base".
3. Heavy-Duty Professional Chairs:
   • The Xiangyaojia H6 employs a "thickened steel tube frame + integrated die-cast aluminum alloy five-star base," with a static load capacity of 1248kg and passing a 250kg impact test, suitable for users weighing between 220 jin and 400 jin (110kg-200kg);
   • Some models meet the SGS heavy-duty testing standard (OD-FT0001.2), with impact tests up to 204kg and verification tests up to 250kg.

II. International Certification Standards for Load Requirements

BIFMA (Business and Institutional Furniture Manufacturers Association) certification is a crucial standard for measuring office chair safety, covering tests for static strength, dynamic impact, and more:

1. Static Tests:
   • The backrest must withstand a pressure of 1334 Newtons (approximately 300 pounds or 136kg) for 1 minute;
   • The five-star base must withstand a pressure of 11120 Newtons (approximately 2500 pounds or 1134kg) for 1 minute.
2. Dynamic Tests:
   • A 136kg weight is dropped freely from a height of 6 inches to test structural impact resistance;
   • A 102kg weight undergoes 60,000 rotation tests to verify durability.

III. Comparison Between Domestic and International Standards

The domestic standard QB/T 2280-2016 only requires a 102kg impact test, whereas BIFMA X5.1 raises the impact standard to 136kg. SGS further introduces a heavy-duty standard (OD-FT0001.2), with impact tests up to 204kg and verification tests up to 250kg, suitable for high-end heavy-duty office chairs.

Summary: When selecting an office chair, choose a load capacity rating based on the user's weight and prioritize products certified by BIFMA or SGS to ensure safety.