I have a long skinny 5 story building that has (4) building cores spaced equally across the building, each core with toilet rooms, stair shaft and elevator. At some point in the past the building cores located on the (2) extremes ends of the building, (on some of the upper floors), have been totally encompassed by a tenant. Access into the tenant spaces is by card reader only, however, they are fail-safe and in an emergency someone could exit through the tenant space to the exit stair if needed. Pg 37 of the 2017 BOMA states the BBC path needs to connect all "essential" circulation, Service and Amenity areas and the illustration on pg 70 (ill36d) clearly shows a BBC that occurs inside of a tenant space. I have also read another post on this site (July 11, 2018) where it was suggested that the BBC needs to connect each of the essential building cores, even when there are multiple cores. The "essential" part of access to the encompassed building cores would be in an emergency.
Now to my question:
Following 2017 BOMA Standard for Office Buildings, would a BBC "path" be required to the building cores that are located inside, and totally encompassed by, a tenants space? Or would that "path" just be considered as part of the tenants S.F. because other than an emergency situation, the tenant would be the only one with access to the building core?