Intent 1:
To limit the probability of:
- excessive spacing between wythes, which could lead to:
- compromised ability of wythes to act as a single, structural
element, or
- buckling of wall ties under compressive loads due to
lateral loads from wind or earthquakes, or
- an inadequate width of cavities, which could lead to
extruded mortar bridging the cavity, which could lead to water crossing
the cavity and penetrating the interior wythes by capillary action,
which could lead to the deterioration of the interior wythes.
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
- in assemblies exposed to moisture or the exterior, damage
and deterioration.
For floors and elements supporting floors, this is to limit
the probability of excessive movement, deflection or vibration, which
could lead to negative effects on the psychological well-being of
persons.