9.20.6.2.(2)

Objective

OS2 Structural Safety

Attribution

[F20,F22,F61-OS2.3]Applies to elements that support or are part of an environmental separator.

Intent

Intent 1:

To limit the probability of:

  • excessive spacing between wythes, which could lead to:
    • compromised ability of wythes to act as a single, structural element, or
    • buckling of wall ties under compressive loads due to lateral loads from wind or earthquakes, or
  • an inadequate width of cavities, which could lead to extruded mortar bridging the cavity, which could lead to water crossing the cavity and penetrating the interior wythes by capillary action, which could lead to the deterioration of the interior wythes.

This is to limit the probability of compromised structural integrity, which could lead to:

  • structural failure of masonry construction, or
  • where masonry construction is part of an environmental separator, the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to further compromised structural integrity.

This is to limit the probability of harm to persons.

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