Final answer:
Fixed seats are determined by whether they are attached to the floor or structure.
Step-by-step explanation:
When calculating occupant loads, the factor that determines if seats are considered fixed is whether the seats are attached to the floor or structure. If the seats are fixed and securely attached to the floor or structure, they are considered fixed seats. On the other hand, if the seats are movable and not attached to the floor or structure, they are not considered fixed seats.
For example, in a theater or lecture hall, the seats are usually fixed, bolted to the floor or structure. In contrast, in a cafeteria or restaurant, the seats are typically movable and not attached to the floor or structure.
The number of people in the seats or the type of occupancy in the space are not the determining factors for whether the seats are considered fixed or movable.