Sentence 9.8.2.2.(2)

Intent 1:

To limit the probability of insufficient clear height over stairs in other than single dwelling unit and a house with a secondary suite, where occupants might not be familiar with their surroundings.

This is to limit the probability of:

• persons accidentally contacting the ceiling with their head, or
• persons accidentally contacting the ceiling with their head in an emergency, which could lead to persons falling, which could lead to delays in the evacuation or movement of persons to a safe place.

This is to limit the probability of harm to persons.