To limit the probability that the height of step risers will be excessively high or low such that it will not be easily discerned, 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.
To limit the probability that the height of step risers will be excessively high or low such that it will not be easily discerned, which could lead to persons tripping or falling, which could lead to harm to persons.
To supersede the requirements of Sentence 3.3.1.14.(1), which would otherwise require stair riser dimensions to conform to Section 3.4. for exit stairways [specifically Sentence 3.4.6.8.(2)].