For a Group R occupancy building with a parking garage of Type I construction, how is the minimum type of construction determined?

In the context of a Group R occupancy building with a Type I construction parking garage, the minimum type of construction is determined from the floor above the parking lot. This is because the construction type must be assessed based on the areas that contain the primary occupancy, which in this case is the residential part of the building located above the parking garage.

When evaluating the construction type for fire safety and structural integrity, it is essential to recognize that the area directly above the parking garage operates under different requirements than the garage itself. The floor above the garage is crucial because it serves as a transition space that separates the more hazardous parking area from the residential units, influencing factors such as fire-resistance ratings and structural support designated for the occupancy type.

In summary, focusing on the floor above the parking lot allows for proper adherence to safety regulations and provides adequate protection for the occupants in case of a fire or other emergency originating from the garage area.