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Furniture. Chairs with electrically operated support surfaces. Requirements Ingestion-build-50790 BS EN 14764 specifies safetyWhat is this standard about? It specifies requirements and test methods for chairs with support surfaces the position of which can be adjusted electrically by the seated person and or a responsible person. Who is this standard for? Designers manufacturers suppliers of chairs with electrically operated support surfaces Users of such chairs Testers of such chairs Why should you use this standard? It specifies the safety, strength, stability and