Project Key Systems for Builders
Keyed Alike Systems
Keyed Alike Systems are available where two or more locks are to be operated by the same key. There is no limit to the number of locks which can be supplied keyed alike.
Master Keyed System
A Master Keyed System is one in which each lock has its own owner (or individual) key, which operates that lock only and no other. Within the system each lock is built to a master key which will open all locks in the group. Within the master keyed system, locks can be grouped and keyed alike if required. These locks would still be operated by the master key.
Grand Master Key System
Each lock has an owner key which operates that lock only and no other, but the locks are divided into two or more groups. Each group is operated by a master key which opens all locks in that group, but will not operate other groups. However, all locks are operated by a Grand Master Key which operates all locks in all groups. Within each group, locks can be keyed alike if required. These locks would still be operated by the G.M.K system.
Maison Key System
A Maison System is one in which two or more owner keys that differ from each other operate a common lock. This system is ideally suited for apartment house and flat use for main entry, garage, etc. This system, if required, can be included in a master key system.
Project Key System
A Project Keyed System is one in which one or more locks are operated by a common key (project key) and an individual owner key supplied to each lock. Owner key is not used during construction (Fig.1). The use of owner key cancels out the project key and renders it inoperative in that particular lock on any future occasion (Fig 2).