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6.2.3.3.(2)
OS1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Access openings in air duct systems and plenums serving heating, ventilating and air-conditioning systems, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6].
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Intent
Intent 1: 
To limit the probability that a lack of access for cleaning will lead to an accumulation of combustible materials, which could lead to fire, which could lead to harm to persons.
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