To supersede the requirements of Sentence 3.6.2.1.(7), which would otherwise require a minimum 1 h fire separation, and require a higher minimum rated separation, on the basis that there is a higher risk of fire or explosion where there is an incinerator.
To limit the probability that a fire will spread from a service room containing an incinerator to other parts of the building, which could lead to harm to persons in the other parts of the building.
To limit the probability that a fire originating in a location outside a service room containing an incinerator will spread into the service room, which could lead to the disruption and discontinuation of service from equipment located in the service room, which could lead to an undue fire hazard in the building, which could lead to harm to persons.