Which of the following factors does NOT affect exit access doorways?

The factor that does not affect exit access doorways is roof height. In commercial building design, exit access doorways are primarily influenced by the occupancy load, room capacity, and type of occupancy, which pertain directly to how many people are using the space and the nature of the activities that take place there.

Roof height can influence aspects such as overall building design, fire safety considerations, and structural integrity, but it does not have a direct impact on the configuration, number, or placement of exit access doorways. These doorways are designed to provide safe and efficient egress routes for occupants based on their numbers and the type of occupancy, which are critical for ensuring safety in emergency situations.