9.20.11.2.(3)

Objective

OS3 Safety in Use

Attribution

[F20,F80-OS3.1]Applies to floors and elements that support floors.
[F20,F80-OS3.7]Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.

Intent

Intent 1:

To limit the probability of:

  • failure of the ties,
  • inadequate lateral load distribution, which could lead to failure of the connection between intersecting walls, or
  • inadequate bonding to mortar under lateral loads.

This is to limit the probability of an inability to transfer lateral loads from masonry walls to intersecting walls intended to provide lateral support, which could lead to inadequate lateral stiffness, which could lead to an inability to resist lateral loads or inadequate distribution of gravity loads, which could lead to cracking or buckling.

This is to limit the probability of:

  • compromised structural integrity of masonry construction,
  • where masonry construction is part of an environmental separator, the displacement or failure of required environmental separation elements, which could lead to deterioration, or
  • an inability to resist expected loads, which could lead to:
    • the excessive movement or deformation of walls, or
    • the excessive deflection or vibration of floors.

This is to limit the probability of:

  • compromised operation of doors or windows required for egress in an emergency, or
  • persons losing their balance, tripping or falling.

This is to limit the probability of harm to persons.

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