What factor influences the egress capacity calculation most directly?

The number of occupants is the most direct factor influencing the egress capacity calculation because the primary purpose of egress systems is to ensure that all individuals can safely exit a building in the event of an emergency. Egress capacity is determined based on the expected number of people who will use the exits, as this informs the required width and number of exits necessary to accommodate safe and timely evacuation.

Building codes typically stipulate specific calculations that link the number of occupants in a space to the width of the exit pathways. This includes factors such as travel distance to exits, the arrangement of exits, and the total exit width needed, which are all designed to prevent overcrowding and ensure safety during an evacuation scenario.

While other options like the number of exits, square footage of the building, and occupancy classification do play roles in determining egress requirements, they are all fundamentally related to how many occupants are expected to use those exits. Ultimately, it is the number of occupants that dictates the urgency and necessity of adequate egress provisions.