What chair load ratings actually test
'Rated to 150 kg' is meaningless without the test behind it. Here is what the two standards commercial buyers actually reference put a chair through.
Published by JP Furniture · Chair manufacturer in Foshan, China · 2026-09-26
EN 12520 vs BIFMA X5.1
Both standards test seating strength and durability, but they differ in scope and market:
- EN 12520 — the European domestic-seating standard. Covers static and fatigue loading of the seat, back and legs. Widely accepted across the EU and referenced in most export specifications.
- BIFMA X5.1 — the US commercial standard. Heavier cyclic loading and more drop-test cycles; typically required by North American hospitality groups.
We test to BIFMA and EN assemblies on request and can supply the report with the shipment.
Reading a load rating
A rating tells you the test mass, not the guest limit. A chair certified at 110 kg has been cycled with a 110 kg mass tens of thousands of times — it has not been proven to collapse at 111 kg. The margin is real but it is not a specification you should design around.
For restaurants, specify the fatigue level, not the static number. Fatigue is what separates a chair that lasts three years from one that lasts eight.
Which level to specify
- Café, light service: EN 12520 domestic level is usually adequate.
- Full-service restaurant, hotel: contract / severe-use level, or BIFMA X5.1.
- Banquet and events: severe-use plus a stacking-cycle test — banquet chairs fail at the joints long before they fail in the seat.
Ask for the test report number, not a marketing claim. Our quality control page lists what we inspect and what we send with each container.
