1 Scope
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a) incorporates a lock conforming to BS EN 12209:2016 [no rendering defined for element: std-id ] 10.3403/30298569 that can be locked from both sides with a key thereby only allowing key egress; and
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b) is used in doors, window doors and entrance doors in buildings.
NOTE 1 Thief-resistant lock assemblies that provide keyless egress or assemblies that provide a secure (no egress) mode in addition to keyless egress are specified in BS 8621 [no rendering defined for element: std-id ] 10.3403/03168047U and BS 10621 [no rendering defined for element: std-id ] 10.3403/30167592U (respectively), because they are sufficiently different in terms of what they offer for means of escape (from fire) and security.
NOTE 2 It is possible that lock assemblies conforming to this standard might not be suitable for use on doors constructed from certain types of material, e.g. plastic or aluminium. See 9.2, which specifies the information to be provided on the marking on the packaging of the lock assembly.