OH1 Indoor Conditions

To limit the probability of:

- inadequate corrosion resistance, which could lead to the corrosion of metal ties,
- an inadequate cross-sectional area, or
- an inadequate shear area through the mortar.

This is to limit the probability of:

- buckling failure of metal ties under lateral loads,
- tensile failure of metal ties under gravity loads, and
- failure of the bond between mortar and metal ties under lateral loads.

This is to limit the probability of inadequate load distribution among the wythes of multiple-wythe masonry walls, which could lead to an inability to resist transverse or vertical loads, which could lead to cracking or buckling.

Where masonry units support or are part of an environmental separator, this is to limit the probability of:

- excessive moisture transfer through masonry units, or
- deformation or cracking, which could lead to the displacement or failure of required environmental separation elements.

This is to limit the probability of:

- condensation,
- precipitation ingress,
- moisture ingress,
- excessive heat transfer,
- pollutant ingress, or
- compromised thermal performance of components intended to resist heat transfer.

This is to limit the probability of:

- an inadequate control of temperatures in 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.