Intent 1:
To limit the probability:
- that users will place their foot off the tread or incorrectly
place their foot on the tread, or
- of excessive depth beyond the nosing of the upper tread,
which could lead to users positioning their foot too far under the
upper tread.
This is to limit the probability of:
- persons misstepping or tripping, or
- persons misstepping or tripping in an emergency, 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.