Intent 1:
To limit the probability of inadequate capacity
to transfer loads from supported floor and roof framing members in
construction where a lintel will serve the function of a second top
plate, which could lead to an inability to resist expected gravity
and lateral loads, which could lead to:
- the inadequate distribution of vertical loads to and
from studs, which could lead to the excessive deflection of wall plates,
or
- inadequate diaphragm action of plates, which could lead
to the excessive deflection of walls.
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.