Master Key System Design Guide - Sargent Locks

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Key SymbolsStandard Key SymbolsA key symbol is an alpha and/or numeric (A, AA, 1AA)designation that is used to properly identify the correctkey combination for a door or group of doors.Key Symbols2-Level SystemHere are a few rules to consider when designinga 2-level system:Rule #1: Master keys get 2 letters and usuallystart at the beginning of the alphabet. Themaster key shown below is AA.Rule #2: Change keys have numbers added tothe letters of the master key they’re under. In2-level systems, the numbers come first.AA1AA2AA3AA3-Level SystemIn systems with more than 2 levels, the changekey numbers come last. Here we have a 3-levelsystem, a grand master key system.The change key numbers come last and themaster keys have 2 letters. The new item here isthe grand master key.Rule #3: GMKs have only one letter.Rule #4: Masters under the grand must startwith the letter of that grand. All masters undergrand A must begin with the letter A. Avoidthe use of the letters I, O and Q, as they are tooeasily confused with the numbers 1 and 0.When more than 23 masters are needed undera grand master, insert the rotation numberbetween the letters of the master key symbol.Example: AA through AZ for the first 23 masters,A2A through A2Z for the 24th through the 46 thmaster, etc.AAA AB ACAA1AA2AA3AB1AB2AB3AC1AC2AC36NOTE: See glossary on pages 13–16 for terms and definitions.For assistance, contact your local ASSA ABLOY Door Security Solutions team.Ask about Key Wizard ® key control software.
Key SymbolsGrand Master Pie “A”A keying system is like a pie. You can cut it into many pieces,but the more pieces, the smaller each piece and the morethere is to manage.The larger you make one piece, the less remaining pie available.AMANAPARASKeep It SimpleAAABACAAABKey SymbolsALADAKAEACADAJAHAGAFMany masters: “Top heavy”system with limited roomfor expansionFewer masters: preferabledue to more expansionopportunitiesThe following represents a schematic of a level three (GMK) system.Your system may vary somewhat from this.AGrand Master Key(HSKP) Housekeeping Key(Selective Master Key)PerimeterAAOperationsABManagementACServiceADFutureAEFutureAFEntrancesAA1StorageAA2SecurityAB1Lock ShopAB2HRAC1 – AC5ITAC6 – AC10W-ToiletsAD1M-ToiletsAD2FuturePlan 30FuturePlan 30A1–President'sOffice(Change underthe Grand)Roof AccessAA3Electric ClosetAB3FinanceAC11-AC15CafeteriaAD3 – AD6Phone ClosetAB4OfficesAC14-AC30(HSKP)JanitorAD7 – AD10Access Control OverrideSKD1Pipe ChasesAB5NOTE: See glossary on pages 13–16 for terms and definitions.For assistance, contact your local ASSA ABLOY Door Security Solutions team.Ask about Key Wizard ® key control software.7
Page 1 and 2: Master Key SystemDesign GuideGuidan
Page 3 and 4: Careful planning is key to the long
Page 5: Planning2-Level SystemThe simplest
Page 11 and 12: Step by StepDesigning Master Key Sy
Page 13 and 14: GlossaryThis glossary relates to AS
Page 15 and 16: GlossaryLARGE FORMAT INTERCHANGEABL
Page 17 and 18: Levels of KeyingThis chart shows th
Page 19 and 20: Sample SystemKS.3 System Schematic

Master Key System Design Guide - Sargent Locks

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