1. OS2
  2. OS3
  3. OH1


OS3 Safety in Use



Intent 1:

To limit the probability of the excessive deflection of stairs or the failure of foundation walls at the point of stair attachment due to dead and live loads imposed by stairs and users, which could lead to:

  • persons falling,
  • persons falling 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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