What type of fire door is commonly used in stairwell enclosures or corridors that require fire protection?

Swinging fire doors are commonly used in stairwell enclosures or corridors to provide fire protection, as they effectively help contain smoke and flames within designated areas. These doors are designed to resist fire for a specified duration, ensuring that they fulfill their purpose during an emergency by preventing the spread of fire and smoke to other parts of a building. Their swinging mechanism allows for easy access and quick egress, which is critical in emergency situations where people need to evacuate safely.

In contrast, other types of fire doors, such as overhead rolling steel, vertical sliding, and horizontal sliding fire doors, serve specific applications that may not be as suitable for stairwell enclosures or corridors. For instance, overhead rolling steel fire doors are often used in industrial settings or large openings where a retractable door is needed. Vertical and horizontal sliding fire doors are typically employed in large openings where space constraints might prohibit swinging doors. Therefore, swinging fire doors are the most appropriate choice for the context of stairwells and corridors requiring fire protection.