The 2012 LSC for Existing Healthcare, CH 18.104.22.168.2 stipulates that Hazardous storage rooms over 50 s.f. need only be separated from other spaces by smoke parititions and the door shall be self-closing if the facility is protected by a fire extinguishing system. I am reviewing a facility built in the late 1990's that has a fully automated supervised fire sprinkler system. All of the storage rooms, regardless of size are indicated to be separated by one hour rated fire walls. Is this necessary now and was it necessary then? The 2012 code for Existing Healthcare does not make a distinction for rooms 100 s.f. or more. Do they only require smoke partitions as well per the 2012 code for existing facilities?