What factor primarily influences the design of an exit access?

The design of an exit access is primarily influenced by regulatory codes. These codes are established to ensure safe egress for occupants in case of an emergency. They dictate how exit access pathways must be designed, including their width, length, signage, and the materials used for construction. Compliance with these codes is mandatory and ensures that the building facilitates appropriate and timely evacuation, ultimately prioritizing the safety of the occupants.

While other factors like occupant flow, lighting design, and building materials play a role in the overall design and may affect the usability and functionality of an exit access, they do not carry the same weight as regulatory codes in dictating the minimum requirements for safety. Regulatory codes provide a framework that must be followed to prevent hazards and ensure a safe environment for all building users.