Key Systems - Corbin Russwin

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How to Establish Key SystemsKey SystemsConvenience May Reduce CylinderSecurity and Hinder System ExpansionWhenever two or more different keys suchas AA1 and AA2 are both required tooperate the same cylinder, the cylinder'ssecurity is reduced. This is called crosskeying. When the cross keying occursunder all the same higher level keys, suchas AA1 and AA2, it is known as controlledcross keying. When it combines keys underdifferent higher level keys, such as AA1and AB1, it is known as uncontrolled crosskeying.In addition to reducing the security ofthe cylinder, cross keying usually imposeslimits on the flexibility and expansion ofthe overall keying system. This is especiallytrue of uncontrolled cross keying. Forthese reasons, it is strongly recommendedto allow personnel to carry more than onekey. Cross keying should be discouragedwhenever possible. However, whencross keying is required, it is specified asfollows, and should be summarized at thebeginning of each order.Case #1Cylinder requires its own change key.The illustration depicts part of a smallmedical building where two doctors sharea common receptionist. The receptionistgets the AA3 key. Each doctor carries akey which operates only one office, butis also cross keyed into the entrance fromthe corridor.Determine the symbol of the change key(example: AA3). Then prefix the letter X(example: XAA3). Then list all keys whichare to operate in an “operated by . . .”phrase. Example: “XAA3 operated byAA1, AA2, AA and A”. Note that X is acylinder specification only. The keys forcylinder XAA3 are designated AA3.XAA3Case #2Cylinder does NOT requireits own change key. Thisillustration depicts a sectionof a floor in a dormitory.Each student's bedroom keyAA1 AA2AA3operates the hall door lock.There is no need to constructX1Xa key which operates onlythe hall door.In this case, place an X atboth the beginning and endof the symbol and a numberAA4 AA5AA6between them. Example:X1X operated by AA1 through AA6, AA and A.X1X, X2X, etc. Again, alwaysinclude the “operated by . . .” phrasewith a complete listing of key symbols tooperate.AA2AA1ReceptionistOffice 1 Office 2XAA3 operated by AA1, AA2, AA and A.Key Systems.5245078-3/14
NotesKey Systems45078-3/14Key Systems.53
Page 2 and 3: ApplicationsKey SystemsTable of Con
Page 4 and 5: Key Wizard ®Key SystemsKey Managem
Page 6 and 7: Cylinder and Key StampingKey System
Page 8 and 9: ConventionalKey SystemsMortiseMorti
Page 10 and 11: ConventionalComponent (Key-in-Lever
Page 12 and 13: ConventionalKey SystemsComponent (K
Page 14 and 15: Interchangeable CoreKey SystemsFast
Page 18: Security Cylinders (Inactive - For
Page 24 and 25: PyramidKey SystemsMortiseMortise Cy
Page 29 and 30: Key BlanksKey SystemsHow to OrderL4
Page 31 and 32: KeywaysKeyway TypesKey SystemsMulti
Page 33 and 34: KeywaysKey SystemsRestricted62 Seri
Page 35 and 36: KeywaysKey Systems57 Series8 keyway
Page 37 and 38: KeywaysKey SystemsRusswin ® Inacti
Page 39 and 40: KeywaysKey SystemsPyramid (Patented
Page 41 and 42: Cylinder AccessoriesKey SystemsStan
Page 43 and 44: Plug Diameters/Quick CodesKey Syste
Page 45 and 46: Service EquipmentKey SystemsPin Kit
Page 47 and 48: Service EquipmentReplacement Pin fo
Page 49 and 50: Policies and ProceduresKey SystemsP
Page 51: How to Establish Key SystemsKey Sys

Key Systems - Corbin Russwin

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