1. OS3


OS3 Safety in Use



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.

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