When all staircases connect to a common hallway, what is this arrangement often called?

The arrangement when all staircases connect to a common hallway is often referred to as transverse stairs. This term describes a design where staircases are aligned with and accessible from a central corridor, enabling convenient movement throughout the building. This configuration can assist in managing occupant flow and provides multiple egress points in the event of an emergency.

In contrast, return stairs, isolated stairs, and service stairs denote different configurations or purposes. Return stairs typically redirect traffic back to another level within a building, isolated stairs are often found in specific areas and may not connect to a common hallway, and service stairs are used primarily for maintenance and operational access rather than for public occupancy. Understanding these distinctions is crucial for effective emergency planning and building navigation.