The total number of persons that might occupy a building or portion at any one time is called?

• A. Capacity
• B. Occupant Load
• C. Throughput
• D. Population

Answer: (B)

The main idea here is how many people the space is planned to safely hold at one time. That number is the occupant load. It’s the figure used in codes to size exits, doors, stairways, and other egress requirements, and it’s derived from the space’s area and the occupancy type. In other words, occupant load reflects not just how big the room is, but how many people it’s intended to safely accommodate during use.

This differs from capacity, which is the physical limit of how many people can be in the space based on size alone, not the safety calculations for egress. Throughput is about how quickly people can move through the space, not how many may be present at once. Population is a general count of people in an area, not tied to safety-based occupancy calculations.