Sentence 3.4.6.3.(1)

Intent 1:

To limit the probability that persons using exit stairs in a emergency situation will require a rest, or will develop a psychological fear of falling, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.

Intent 2:

To exempt exit stairs serving Group B, Division 2 occupancies from the requirements in the first part of Sentence 3.4.6.3.(1), which would otherwise permit a vertical rise of the stairs of up to 3.7 m, and limit the rise to not more than 2.4. m, on the basis that:

• occupants may be in a poor state of health and may need to rest more frequently, and
• staff moving patients may require intervals of resting.