What is the minimum height for distinguishing marks on swinging type fire shutters installed in exterior openings?

The minimum height requirement for distinguishing marks on swinging type fire shutters installed in exterior openings is set at 6 inches. This standard ensures that the marks are visible and legible in emergency situations, allowing for quick identification of fire safety equipment.

Swinging fire shutters serve a critical role in preventing the spread of fire and smoke, and it is essential that they are easily identifiable by first responders and building occupants. The 6-inch height is large enough to make the markings noticeable from a distance and during stressful situations, thereby enhancing safety.

While there may be other height options suggested in the choices, they do not meet the established guidelines for visibility and identification in emergency scenarios. The 6-inch requirement strikes an appropriate balance between size and practicality, ensuring compliance with safety regulations and improving emergency response times.