Final answer:
The clear width of stairways must be at least 36 inches to meet safety standards, which is answer option 1).
Step-by-step explanation:
Stairways must have a clear width of at least 36 inches at all points above the permitted handrail height and below the required headroom height. This requirement ensures that stairways provide adequate space for users and meet safety standards. The correct answer to the question 'Stairways shall not be less than ____ inches in clear width at all points above the permitted handrail height and below the required headroom height' is option 1) 36 inches.