Sentence 3.3.2.5.(13)

Intent 1:

To limit the probability that aisle steps will be improperly designed with respect to run and tread dimensions, tread finish and proximity to adjacent rows of seats [e.g. steps: are too shallow, have a slippery surface, are a tripping hazard, are not marked clearly], which could lead to difficulties in moving in an emergency situation, 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 limit the probability that aisle steps will be improperly designed with respect to run and tread dimensions, tread finish and proximity to adjacent rows of seats [e.g. steps: are too shallow, have a slippery surface, are a tripping hazard, are not marked clearly], which could lead to persons tripping or falling, which could lead to harm to persons.

Intent 3:

To supersede the requirements of Sentence 3.3.1.14.(1), which would otherwise require step dimensions to conform to Section 3.4. for exit stairways [specifically Article 3.4.6.8.].

Intent 4:

[Clause 3.3.2.5.(13)(d)] To expand the application of Sentence 3.4.6.1.(1) to stepped aisles that lead to exits.