12162018Headline:

Grand Master Keys

Building master key
a master key which operates all or most master keyed locks in a given building.
CMK'd
construction master keyed.
GGGMK
great great grand master key.
GGGMK'd
great great grand master keyed.
GGM
great grand master key.
GGMK
great grand master key.
GGMK'd
great grand master keyed.
GM
grand master key.
GMK
grand master key.
GMK section
grand master key section.
GMK'd
grand master key.
Grand master key
the key which operates two or more separate groups of locks, which are each operated by a different master key.
Grand master key system
a master key system which has exactly three levels of keying.
Grand master keyed
of or pertaining to a lock or cylinder which is or is to be keyed into a grand master key system.
Great grand master key
the key which operates two or more separate groups of locks which are each operated by a different grand master key.
Great grand master key system
a master key system which has exactly four levels of keying.
Great grand master keyed
of or pertaining to a lock or cylinder which is or is to be keyed into a great grand master key system.
Great great grand master key
the key which operates two or more separate groups of locks which are each operated by different great grand master keys.
Great great grand master key system
a master key system which has five or more levels of keying.
Great great grand master keyed
of or pertaining to a lock or cylinder which is or is to be keyed into a great great grand master key system.
Key system schematic
a drawing with blocks utilizing keying symbols, usually illustrating the hierarchy of all keys within a master key system. It indicates the structure and total expansion of the system.
Levels of keying
the divisions of a master key system organized into hierarchies of access.