www.campbell-mccabe.com Master Key System Design Guide 1 Photo Courtesy Island Trunk Master Key System Design Guide Based on Industry Best Practices Planning the Master Key System .................................................................................................... 2 Master Key System Levels ............................................................................................................... 3 Create a Schematic System Layout ................................................................................................ 6 Special Keying Requirements ......................................................................................................... 7 Master Key System’s Capacity ........................................................................................................ 7 Cross Keying ..................................................................................................................................... 7 Design Your System - Keying Conference Preparation ................................................................ 9 Design Your System - Security Objectives .................................................................................. 10 Design Your System - Planning..................................................................................................... 11 Design Your System - Assign Key Symbols ................................................................................ 13 Appendix 1 – Example of Preliminary System Schematic .......................................................... 14 Appendix 3 – Example of Keying Conference Agenda ............................................................... 16 References....................................................................................................................................... 17 Introduction This Master Key System Design Guide was developed to assist client end users and contractors in the planning and development of master key systems on commercial structures. This guide does not supersede or override any contract document including but not limited to the design basis or hardware specification. This document is intended as guidance only and reflects industry best practice, and if followed, should assist in the smooth development of a keying strategy.
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www.campbell-mccabe.com Master Key System Design Guide
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Photo Courtesy Island Trunk
Master Key System Design Guide
Based on Industry Best Practices
Planning the Master Key System ....................................................................................................2
Master Key System Levels...............................................................................................................3
Create a Schematic System Layout ................................................................................................6
Special Keying Requirements .........................................................................................................7
Design Your System - Keying Conference Preparation ................................................................9
Design Your System - Security Objectives ..................................................................................10
Design Your System - Planning.....................................................................................................11
Design Your System - Assign Key Symbols ................................................................................13
Appendix 1 – Example of Preliminary System Schematic ..........................................................14
Appendix 3 – Example of Keying Conference Agenda ...............................................................16
References.......................................................................................................................................17 Introduction This Master Key System Design Guide was developed to assist client end users and contractors in the planning and development of master key systems on commercial structures. This guide does not supersede or override any contract document including but not limited to the design basis or hardware specification. This document is intended as guidance only and reflects industry best practice, and if followed, should assist in the smooth development of a keying strategy.
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Planning the Master Key System
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Master Key System Levels
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Master Key System Levels The Door & Hardware Institute (DHI) has developed an industry standard Alpha/Numeric coding system to formalize the process of assigning key codes in the development of master key systems. The lock manufacturers use these codes to then develop the actual key system bitting codes to key the cylinders and cut the keys. The chart shows the division of a master key system into hierarchies of access. The standard key coding system has been expanded to include key symbols for systems of more than four levels of keying. Note the unique coding for a Two Level System. The key symbols are explained in the next section.
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Key Symbols
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Create a Schematic System Layout After a review of the floor plan, door schedule, and functional use, a schematic is developed indicating an initial system layout. All systems vary. The first example shows the intent of a level three (GMK) system. The second example is a four level system (GGMK) without the functional use descriptions.
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Special Keying Requirements There are additional symbols used for special keying requirements.
Master Key System’s Capacity
Cross Keying
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Cross Keying
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Design Your System - Keying Conference Preparation The keying conference is a workshop where the key people confer about the design of the key system. The key people consult together, compare opinions, and carry on a discussion for the purpose of designing a system that meets the needs of the owner as well as allowing for proper manufacture of the key system. A successful keying conference depends on having the relevant people and building information on hand for the type of facility that is being Master keyed.
Relevant People: Locking System Supplier representative (required)
Building Owner representative (required)
Locking System Manufacturer representative
General Contractor representative
Architect representative
Tenant representative(s)
Building Information: Full Size Architectural Floor Plans
Architectural Door Schedule
Original Finish Hardware Specification
Approved Finish Hardware Schedule Submittal
Other Relevant Information: Locking System Supplier initial keying structure proposal schematic
Manufacturer’s Lock Function Chart
Key System Schematic Worksheet
Key Conference Worksheet
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Design Your System - Security Objectives
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Design Your System - Planning
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Design Your System - Planning
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Design Your System - Assign Key Symbols
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Appendix 1 – Example of Preliminary System Schematic
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Appendix 2 – Example of Key Conference Worksheet Special Keying Requirement Notes:
MASTER MASTER
AREA OR DEPT AREA OR DEPT
LIST DOORS IN KA GROUPS KEYSET QTY LIST DOORS IN KA GROUPS KEYSET QTY
Special Keying Instructions: Special Keying Instructions:
MASTER MASTER
AREA OR DEPT AREA OR DEPT
LIST DOORS IN KA GROUPS KEYSET QTY LIST DOORS IN KA GROUPS KEYSET QTY
Special Keying Instructions: Special Keying Instructions:
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Appendix 3 – Example of Keying Conference Agenda From: Keying Meeting Planner Location: Conference Room Date: One week from today Start time: 1:00 PM End time: 3:00 PM
Key People: Locking System Supplier representative (required) Building Owner representative (required) Locking System Manufacturer representative General Contractor representative Architect representative Tenant representative(s)
Building Information:
Full Size Architectural Floor Plans Architectural Door Schedule Original Finish Hardware Specification Approved Finish Hardware Schedule Submittal Manufacturer’s Lock Function Chart
Other Information:
Manufacturer’s Lock Function Chart Key System Schematic Worksheet Key Conference Work Sheet
Item 1 Locking System Supplier Schematic
Explain initial keying structure proposal o Recommendation based on initial plan review
Item 2 Owner Representative explain plans for building use
Redefine Schematic based on owner input
Item 3 Owner Representative work in conjunction with Lock System Supplier to define general areas for MK’s and specific direction for keysets
Note special keying requirements using worksheet Assign Key Symbols on select openings
Note: The information gained through this conference provides enough information to the Locking System Supplier to complete a door by door keying schedule for final Owner review and approval. Upon Owner written approval the key system may be released to manufacturing.
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References ANSI/BHMA A156.28 Recommended Practices for Mechanical Keying Systems (2007) Assa Abloy Master Key System Design Guide 2340-001 4/07 (2007). Best Access Systems Security B-252 HP804 (2004). Campbell Hardware, Inc. Meeting Minute Archives (1923-1965). Door and Hardware Institute Keying Systems and Nomenclature (1989). Door and Hardware Institute MK-1 Master Keying (1999). Ingersoll Rand Company Cylinders, Keys & Key Control MS-M/P1 (2006).
