When we talk about master suite systems they can be very confusing. A basic master key system comprises a Master Key which passes a group of locks, each with its own separate 'differ' key.
A larger group of locks may require dividing, into departments for example, and each departments' locks would have a separate 'sub' master key which would pass the locks in that department but not the locks in other departments. The master key would of course still pass all locks in all departments
Example 1:- A block of 16 flats in an area has a master key which passes all locks, tenants would be issued with a key that operated their individual flats but each tenant key would also pass a 'common' cylinder fitted to the external entrance door to the flats. Another key may be allowed to access the main entrance and a Cleaners cupboard only.
Example 2:- A High School in an area has five departments and ten buildings. The site manager requires one master key that passes all locks. He requires five sub master keys, each one passing locks in the relevant department. Each classroom has its own 'differ key'
Sub Master Keys are issued to the relevant Department Head and 'differ keys' are issued to teachers so that they have a key to their own classroom.
Separate keyed alike locks still passing the master key are fitted to Cleaners Cupboards, another keyed alike set to Store Cupboards.
Main entrance doors are fitted with keyed alike locks which remain outside of the main master key suite due to the consequences of a master key being mislaid or stolen. In these circumstances, only the outer door cylinders would need to be changed.
Lime Locks can offer a master key suite tailored to your requirements and budget. Introduce the system in stages. Let Paul help you plan your system. Below is a flow diagram of what can be achieved.