When two or more exits are required, what is the maximum number of horizontal exits allowed?

The requirement for horizontal exits in a building code context is designed to ensure safety during emergencies, providing an alternative route for occupants to escape. When determining the maximum number of horizontal exits allowed, the building codes generally specify that only one horizontal exit is permitted as a part of the overall egress strategy.

This is because horizontal exits are intended to allow occupants to move into an adjacent space or area of refuge that is separated from the exit access corridors. The limitation to a single horizontal exit is based on the need to direct evacuation paths and manage the flow of occupants effectively. More than one horizontal exit could complicate egress plans and hinder evacuation efficiency in emergency situations.

In summary, the maximum of one horizontal exit is in place to maintain clarity and safety in emergency situations, ensuring that there are designated paths for occupants to quickly reach safety without confusion or obstruction.