Sentence 9.5.3.3.(1)

Intent 1:

To limit the probability that inadequate height of rooms or spaces will lead to collision with protrusions from ceilings, such as lighting fixtures, ceiling fans and low door heads, in areas that are used infrequently or for a limited time, which could lead to harm to persons.

Intent 2:

To limit the probability that, in an emergency, inadequate heights of rooms or spaces will lead to collision with protrusions from ceilings, such as lighting fixtures, ceiling fans and low door heads, in areas that are used infrequently or for a limited time, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.