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 inadequate joist strength or
inadequate composite strength and stiffness to support the additional weight
of a concrete topping, which could lead to excessive deflection or failure.
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.