Where should the floor number sign be posted within a stair enclosure?

The floor number sign should be posted on every floor within a stair enclosure to ensure that individuals can easily identify their location within the building during both normal use and emergency situations. This is critical for navigation, especially during evacuations, as it helps both occupants and emergency responders ascertain where they are within the structure. Having these signs on each floor maintains uniformity and ensures that people do not become confused about their location if they are moving quickly or if visibility is compromised due to smoke or darkness during an emergency. This comprehensive approach also aids in the efficient response of emergency personnel as they can quickly identify and access the correct floor.