Which fire door assemblies do not require automatic-closing devices in R-1 occupancies?

In R-1 occupancies, which typically include facilities such as transient lodgings (e.g., hotels), specific codes and regulations govern fire door assemblies. The correct answer pertains to common walls separating sleeping units. These particular walls are designed to contain fire and smoke between the sleeping units, thereby enhancing safety for occupants.

Common walls are often constructed with fire-rated materials and are subject to rigorous fire safety standards. The requirement for these walls typically does not extend to the necessity for automatic-closing devices. Instead, they rely on the integrity of the wall and the fire-rated doors to serve their purpose in fire containment.

In contrast, other types of door assemblies may have requirements for automatic-closing devices to ensure that they close after being opened, minimizing the potential for smoke and fire spread. This includes doors leading to public areas and possibly those that are not intended to be continually closed, ensuring that fire protection measures are effectively upheld throughout the building.