How is '75% enclosure' defined in the context of car parks?

The definition of '75% enclosure' in the context of car parks refers specifically to how much of the perimeter of the car park is surrounded or enclosed by walls. When a car park is said to have a '75% enclosure,' it means that 75% of its perimeter is enclosed by walls, which can provide some protection from the elements, effectively distinguishing it from fully open car parks or those that are entirely enclosed.

This definition emphasizes the importance of perimeter treatment in assessing how sheltered a car park is, which affects factors such as ventilation, lighting, and thermal comfort for vehicles and occupants. Moreover, having a roof in addition to wall coverage indicates that the structure is designed to protect vehicles from rain, sun, and debris.

In contrast, other options either misrepresent the concept of enclosure or describe conditions that do not align with the standard definition used in building assessments and regulations. This clarity on the term helps in applying the appropriate standards and guidelines for car park design in adherence to the Pearl Building Rating System.