To limit the probability of an inadequate nail diameter or head size, which could lead to inadequate capacity, rigidity or pull-through resistance, which could lead to an inability to resist expected lateral, gravity or wind-uplift loads.
For floors and constructions supporting floors, this is to limit the probability of:
This is to limit the probability of excessive movement, vibration or deflection of floors, which could lead to negative effects on the psychological well-being of persons.