non-occupiable room

Any room that is not used for department personnel. Examples of non-occupiable rooms are vertical penetrations areas, primary circulation (lobbies, and public corridors), file rooms, storage areas, and mechanical rooms. Other types of service areas, such as secondary circulation, meeting rooms, and lunch rooms can be classified as either occupiable or non-occupiable depending on your reporting goals - whether you want to document the areas current use or its potential use.

You designate a room as non-occupiable by assigning it to a room category that has its Occupiable? field set to No.