To limit the probability that an inadequate design will lead to the overloading of footings, which could lead to excessive subsidence of the soil under the footings, which could lead to the cracking of foundations or building superstructures.
This is to limit the probability of:
For floors and elements supporting floors, this is to limit the probability of excessive movement, deflection or vibration of floors, which could lead to negative effects on the psychological well-being of persons.