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9.19.2.1.(1)
ApplicationIntent
OS2OH1
ObjectiveOS2 Structural Safety
Attribution
[F82-OS2.3]
Application
Application 1: 
In buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], access 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 not less than 3 m2 and not less than 1 m in length or width.
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Intent
Intent 1: 
To limit the probability that attic or roof spaces will be inaccessible for periodic inspection or maintenance, which could lead to:
  • deficiencies in building components going undetected, which could lead to:
    • condensation and the accumulation of moisture, or
    • the formation of ice dams, or
  • the need to demolish building components in order to gain access.
This is to limit the probability of damage to or deterioration of building components, which could lead to structural failure, which could lead to harm to persons.
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