ATTRIBUTION:
Functional Statement:
F20
To support and withstand expected loads and
forces.
F22
To limit movement under expected loads and
forces.
Objective:
OH1.1, OH1.2, OH1.3
INTENT:
To limit the probability of discontinuity between top plates,
which could lead to an inability to resist expected lateral loads, which could
lead to the excessive deflection or failure of wall plates.
Where
wood-frame construction supports or is part of an environmental separator,
this is to limit the probability of the displacement or failure of required
environmental separation elements, which could lead to:
- condensation,
- precipitation ingress,
- excessive heat transfer,
- pollutant ingress, or
- compromised thermal performance of components intended to resist
heat transfer.
This is to limit the probability of:
- inadequate control of temperatures of interior spaces, drafts,
relative humidity or water accumulation,
- the generation of pollutants from biological growth or from
materials that become unstable on wetting, or
- deterioration, which could lead to further compromised integrity
of environmental separators.
This is to limit the probability of:
- negative effects on the air quality of indoor spaces,
- the inadequate thermal comfort of persons, and
- contact with moisture.
This is to limit the probability of harm to persons.