1. OS3


OS3 Safety in Use



Intent 1:

To limit the probability of:

  • insufficient tread depth,
  • incompatibility between the height of risers and the average user's stride,
  • insufficient room to accommodate the length of user's foot, or
  • excessively steep stairs.

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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