(1)
A vertical service space containing a dumbwaiter shall be separated from all other portions of each adjacent storey by a fire separation having a fire-resistance rating conforming to Table 3.5.3.1. for the fire-resistance rating required by Subsection 3.2.2. for
(a)
the floor assembly above the storey, or
(b)
the floor assembly below the storey, if there is no floor assembly above.