In protected buildings where the fire separation distance is greater than 3 feet but less than 5 feet, what percentage of the allowable area can be the maximum area of exterior wall openings?

In protected buildings with a fire separation distance greater than 3 feet but less than 5 feet, the maximum area of exterior wall openings is limited to 15% of the allowable area. This regulation is designed to enhance fire safety by minimizing the potential for fire exposure and spread through openings in exterior walls, especially in scenarios where buildings are closer together.

The guidelines for allowable openings are influenced by the need for fire protection and the potential risk presented by adjacent structures. The choice of 15% serves as a balanced figure that allows for adequate light and ventilation inside the building while still maintaining a level of fire safety that corresponds to the proximity of neighboring structures. Understanding these percentages is crucial for ensuring compliance with safety codes and protecting both the property and its occupants.