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3.2.7.9.(1)
OS1OP1OP3OS3
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Design, with respect to the minimum duration of operation under a full load, of emergency generator power supplies for:
  • elevators:
    • serving storeys above the first storey in a building that is more than 36 m high measured between grade and the floor level of the top storey, and
    • for firefighters in conformance with Sentence 3.2.7.9.(2),
  • water supply for firefighting in conformance with Article 3.2.5.7., where the supply is dependent on electrical power supplied to the building,
  • fans and other electrical equipment that are installed to maintain the air quality specified in Article 3.2.6.2., and
  • fans required for venting by Article 3.2.6.6.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
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Intent
Intent 1: 
To limit the probability that, during a failure of the normal power supply in a fire emergency situation, emergency generator power supplies to certain building services will not be capable of performing their intended functions for a length of time sufficient for emergency responders to carry out their duties, or for persons to evacuate or move to a safe place, which could lead to:
  • the inability of elevator systems to be used in emergency response operations, which could lead to delays in emergency response operations, which could lead to delays in the evacuation or movement of persons to a safe place,
  • firefighting operations being ineffective, which could lead to the fire not being controlled or suppressed, which could lead to the spread of fire, and
  • the inability of smoke management systems to control smoke conditions, which could lead to delays in emergency response operations, which could lead to delays in the evacuation or movement of persons to a safe place.
This is to limit the probability of harm to persons, including emergency responders.
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