Lock assemblies in which the operating mode can be switched between the normal BS 8621 operating mode and a secure mode in which no egress is possible Ingestion-build-47786 deformation properties and shear strength

deformation properties and shear strength

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Lock assemblies in which the operating mode can be switched between the normal BS 8621 operating mode and a secure mode in which no egress is possible Ingestion-build-47786 deformation properties and shear strength1 Scope This British Standard specifies performance requirements and test methods for a thief resistant mechanically operated single point lock assembly (including locking plates, fixing screws, fitting instructions, cylinders and protective furniture, where appropriate) that: a) incorporates a lock conforming to BS EN 12209: 2016 that, under normal conditions, can be unlocked from the inside without the use of a key, thereby allowing keyless egress;