Corrosion resistance and size of anchors connecting roof or floor assemblies to above-ground masonry walls to provide the required lateral support, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]:

• where the wall height above the foundation wall does not exceed 11 m, and
• in which the roof or floor system above the first storey is not of concrete construction.

Exceptions: 

To limit the probability of inadequate strength or corrosion resistance of anchors, which could lead to inadequate anchorage of floor or roof assemblies to masonry walls, which could lead to inadequate lateral stiffness, which could lead to an inability to resist lateral loads or inadequate distribution of gravity 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 deformation or cracking, which could lead to the excessive deformation, 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.