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3.1.8.12.(3)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Method of release of hold-open devices on doors in required fire separations where such devices are used on:
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A, and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] as stated in Sentence 9.10.13.11.(1).
Exceptions: 
except as stated in:
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Intent
Intent 1: 
To limit the probability that a hold-open device will not release a door and maintain the integrity of the fire separation [in which the door is located] when there is sufficient smoke in the vicinity of the door to actuate a smoke detector, which could lead to the spread of fire, which could lead to harm to persons.
Intent 2: 
To remove the permission to allow door release by means other than smoke detection [as stated in Clauses 3.1.8.12.(2)(a) and (b)] in order to provide for prompt release in the case of certain doors.
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