Which factors determine the required number of exits for a given occupant load?

• A. Occupant load, travel distance, egress width, and layout of exits and corridors as dictated by code.
• B. Only occupant load.
• C. Only the number of floors.
• D. Only the door swing direction.

Answer: (A)

Exit requirements are driven by how many people must be able to evacuate and how that evacuation is physically possible within code limits. The occupant load is a primary factor because more people require greater egress capacity. But the distance people must travel to reach an exit matters too; if the travel distance exceeds what the code allows, additional exits or wider paths are needed to keep evacuation times acceptable. The width of egress paths—corridors and doors—determines how many people can pass simultaneously, so wider paths can handle larger loads without adding more exits. The layout of exits and corridors matters because a good arrangement provides alternate routes and reduces congestion, preventing chokepoints during an evacuation. Taken together, these factors set how many exits are required. Focusing on only occupant load misses distance, width, and layout considerations; likewise, the number of floors or door swing direction alone do not determine exit count.