If the number of dwelling units served by a vertical circulation core and corridor on each story does not exceed the number set forth in the following table, 50 percent of the square feet of the corridor serving such dwelling units on such story may be excluded from the definition of floor area.

Dwelling units with entrance doors on more than one corridor (duplex and triplex units), may count each entrance door as a fraction of the total number of doors to such dwelling unit when determining the number of dwelling units served per corridor.

DENSITY OF DWELLING UNITS PER CORRIDOR