9.26.11.6.(1)

Objective

OS2 Structural Safety

Attribution

Intent

Intent 1:

To limit the probability of:

  • an inadequate resistance to water absorption, freeze-thaw cycling, UV exposure or other deleterious environmental loads, which could lead to the premature failure of built-up roof membranes, or
  • built-up roofs with inadequate tensile strength, which could lead to splitting and tearing of the membranes under traffic loads and movement of the building structure.

This is to limit the probability of water penetrating directly to roof decking or sheathing, which could lead to deterioration, which could lead to the structural failure of roofs or assemblies protected by roofs, which could lead to harm to persons.

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