9.15.3.8.(1)

Intent 1:

To limit the probability of insufficiently thick concrete footings, which could lead to:

• drying before hydration is complete, or
• inadequate shear strength.

This is to limit the probability of weak concrete, which could lead to shear failure under gravity loads transmitted through foundation elements, which could lead to excessive settlement of the soil and structural damage to the foundation and the building.

This is to limit the probability of:

• compromised structural integrity, or
• where elements support or are part of an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements.

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.