How the key levels fit together
A master key system lets different keys open different combinations of locks. An employee can have a key for an assigned room while a manager holds a key that opens several rooms. The person responsible for the property can hold a master that operates the doors included in that system.
The number of levels depends on the building, its departments and who needs access. The usual structure includes:
- Door key: Opens its assigned door or designated group of doors.
- Sub-master: Opens a group such as one department, floor or building.
- Master: Opens the doors within its assigned master system.
- Grand master: Operates across several master groups.
A small office may need only individual keys and one master. A property management portfolio with separate buildings may benefit from additional levels. More levels are not automatically better.
Decide who should open each door
The difficult part of master key design is usually not the lock hardware. It is agreeing on who needs to go where.
Start with a door inventory. Identify each entrance, office, storage room and shared area. Then list the people or job roles that need regular access. Include maintenance staff, managers and other authorized personnel whose responsibilities cross departments.
Separate daily access from management access. Someone who works in one office may need only that room and the shared entrances. A maintenance employee may need access across several floors without carrying every individual door key.
Some rooms should remain outside the general master system. Cash rooms, server rooms and records storage are examples. Their keys can be managed separately so a general master does not open them.
For Las Vegas businesses with multiple departments or managed properties, this planning also makes staff changes easier to handle without improvising access rules each time.
Leave room for future doors
A master key system should accommodate the property you expect to operate, not just the doors that happen to be installed when the work begins.
Consider whether another floor, unit, department or building may be added. Assigning every available key combination at the beginning can limit future expansion.
The locksmith uses the door schedule and planned access groups to develop a keying arrangement with room for additional locks. The number of practical combinations depends on the cylinder system and the access structure.
Changes to the building should be documented. Adding a door without updating the system records can make it difficult to confirm which keys are supposed to operate it.
Understand the security tradeoff
Master keying adds convenience by allowing more than one designated key to operate a cylinder. That flexibility slightly reduces the number of available pin combinations compared with a cylinder keyed for one operating key.
Restricted or high-security cylinders can offset this tradeoff. Restricted keys use controlled blanks that are not available for copying at ordinary hardware stores or kiosks. High-security hardware may also be appropriate for doors that need stronger cylinders.
The appropriate choice depends on how access is divided and how much control the business needs over additional keys. Not every door needs the same hardware or key level.
Keep records as people and properties change
A master key plan is only useful while the business knows which keys exist and who is authorized to receive them.
Maintain a current door schedule, key assignments and a list of people allowed to request additional keys. When employees change roles or leave, review the keys they held and whether the affected cylinders need rekeying.
Cairn keeps master key customer records in a locked file. Additional keys are released only to authorized contacts listed on the account, following a signed request.
For commercial projects, Cairn begins with a walkthrough, develops a written recommendation and proposal, and tests the completed system with the manager. The business receives a door-by-door record for ongoing key control.