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9.19.2.1.(3)
ApplicationIntent
OH1OS2OH2
ObjectiveOH2 Sanitation
Attribution
[F42-OH2.5] Applies where access is from the exterior or an unheated enclosed space.
Application
Application 1: 
Closures for access hatches to attic or roof spaces that measure:
  • not less than 3 m2 in area,
  • not less than 1 m in length or width, and
  • not less than 600 mm in height over an area that is not less than 3 m2 and not less than 1 m in length or width.
This applies where access to attic or roof spaces is:
  • from the exterior,
  • from interior heated space, or
  • from unheated enclosed space (e.g. garage).
This applies in 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: 
Where access is from the exterior or unheated enclosed space (e.g. a garage), to limit the probability of openings in environmental separators, which could lead to the ingress of insects or vermin, which could lead to negative effects on sanitation, which could lead to harm to persons.
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