What is the maximum area for exterior wall openings in buildings where the fire separation distance is less than 5 feet?

In buildings where the fire separation distance is less than 5 feet, the maximum allowable area for exterior wall openings is typically restricted to 15%. This regulation is in place to ensure adequate fire safety and limit the spread of fire from the building to its surroundings or between adjacent structures. The reasoning behind this restriction is that the closer a building is to another structure or property line, the greater the potential risk of fire spread.

Setting the maximum opening area at 15% allows for some windows and doors to be included in the design while still maintaining a safer environment in terms of fire hazards. It is important to adhere to these guidelines to ensure compliance with fire codes and to protect public safety.