9.20.9.4.(3)

Intent 1:

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 construction is required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.