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9.10.20.2.(2)
OS1OP1+
ObjectiveOS1 Fire Safety
Attribution
[F12-OS1.2,OS1.5] Applies to portion of Code text: " Access required in Sentence (1) ... provides an opening not less than 1 100 mm high and 550 mm wide, the sill height of which shall not be more than 900 mm above the floor."
Application
Application 1: 
Minimum opening size, and maximum sill height above floor level, of the access [for firefighting] required in Sentence 9.10.20.2.(1) [direct access to the outdoors to at least one street from unsprinklered basements exceeding 25 m in length or width].
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of delays or ineffectiveness in fire emergency response operations, which could lead to:
  • delays in the evacuation or movement of persons to a safe place, and
  • the spread of fire to other parts of the building.
This is to limit the probability of harm to persons.
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