To limit the probability that moisture-content-related soil movement, frost heave, pressure due to the formation of ice lenses, adfreeze, and weathering of pyritic material will 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.