In lodging and rooming houses, which of the following is considered a primary means of escape?

In lodging and rooming houses, enclosed interior stairs are a primary means of escape because they provide a safe and effective route for occupants to exit the building in the event of a fire or other emergency. These stairs are typically designed to be fire-resistant, helping to protect evacuees from smoke and heat while they are making their way to the ground level. The enclosure reduces the risk of fire and smoke spreading into the escape route, ensuring that it remains accessible during an emergency.

This route is essential as it allows for the orderly evacuation of all residents in a multi-story building, facilitating efficient movement to safety. The design often includes features such as handrails and proper lighting, enhancing visibility and safety during an evacuation.

In contrast, the other options, while they may aid in escape in certain scenarios, do not serve as the primary means of escape. For instance, fire doors to the exterior are important for containment but not designated for evacuation routes. Window access, while potentially usable, may not be viable for all occupants, particularly those on higher floors or with mobility impairments. Service elevators may not be reliable for escape during a fire due to potential power failures and are not designed for evacuation purposes, as they may expose occupants to hazards during an emergency.