Master Key System Design Guide - Sargent Locks

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PlanningPlanningSystem StructureBegin sketching out a key system schematic using descriptiveterms appropriate for the job at hand. Typically these wouldbe departments, buildings or geographic areas. It is notnecessary to account for every change key at this early stage.The schematic often looks like an organizational chart.When planning the system, don’t forget the building core.Core areas are generally maintenance areas: stairwells,mechanical rooms, electrical, phone and HVAC areas.Normally, individual floor or department masters DO NOToperate these areas. Group them all under their own MK(or use changes under the grand, etc.).Key all similar core areas alike: one key symbol for all electricalareas; a second one for all pipe chases; a third for allmechanical rooms, etc. This reduces the need to issuemaster keys to maintenance personnel. Once the structure isdetermined, the next step is to determine the level of keying.SYSTEM WIDEADMINISTRATION RESEARCH CORE AREASAREAS AREAS AREASLevels of KeyingFirst, we must understand theconcept of levels of keying. Thinkof it as levels of authority in anorganization. All systems shouldhave a structure like that of acorporate organizational chart.EXECUTIVESUPERVISORY SUPERVISORY SUPERVISORYEMPLOYEEEMPLOYEEEMPLOYEE4NOTE: 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.
Planning2-Level SystemThe simplest master key system has two levels of keyingand is considered the lowest level of master keying. The lesspowerful keys at the bottom are called change keys. Each oneoperates only one lock, or one group of keyed alike locks. Themore powerful key at the top is called the master key.Even the largest, most complicated keying systems forhospitals and universities can be broken down into piecesthat fit this simple model.MKCKCKCKPlanning3-Level SystemA 3-level system is nothing morethan two or more 2-level systemstied together under a higher levelkey called a grand master key.MKGMKMKMKCKCKCKCKCKCKCKCKCK4-Level SystemA 4-level system ties two or more3-level systems together under ahigher level key called a great grandmaster key.Even though large jobs tend torequire more levels of keying thansmall jobs, most systems do notneed more than 4 levels of keying.MKGMKMKGGMKMKGMKMKIn a 4-level master key system, it isespecially important to consider thetraffic flow throughout the building.CKCKCKCKCKCKCKCKCKCKCKCKNOTE: 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.5
Page 1 and 2: Master Key SystemDesign GuideGuidan
Page 3: Careful planning is key to the long
Page 7 and 8: Key SymbolsGrand Master Pie “A”
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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