When more than 100 persons congregate on levels that are either above or below street level, what occupancy classification is this?

The correct classification for a gathering of more than 100 people on levels above or below street level falls under Public Assembly occupancy. Public Assembly occupancy is defined by its purpose to accommodate people in groups for various activities, such as meetings, concerts, theaters, and other events where individuals gather together.

Public Assembly zoning takes into consideration factors such as the safety of the occupants in case of emergencies, the need for crowd control, and adequate access and egress pathways for individuals. This classification is vital in ensuring that buildings are designed, constructed, and maintained to safely facilitate large gatherings.

Mercantile Occupancy is specifically intended for the display and sale of goods to the public, typically involving spaces like retail stores. Although such spaces can have large numbers of customers, they do not primarily serve the purpose of assembly. Business Occupancy refers to buildings used for office activities and services, while Factory Occupancy relates to manufacturing and production areas. These classifications do not apply to situations where large groups congregate for activities outside of commerce or business.

Thus, in this scenario, where more than 100 persons are gathered, the correct occupancy classification is Public Assembly, as it encompasses the characteristics and safety requirements necessary for such situations.