9.27.8.5.(3)

Intent 1:

To limit the probability of inadequate support for butt joints, which could lead to:

• an inadequate resistance to impact loads, which could lead to open joints, or
• misalignment of vertical butt joints.

This is to limit the probability of precipitation or meltwater ingress, which could lead to deterioration, which could lead to the structural failure of exterior walls or elements protected by exterior walls, which could lead to harm to persons.