For the design of architectural components (e.g., heavy suspended ceilings), the seismic design force Fp is calculated as a function of the component's weight (Wp) and what other critical factor at the point of attachment?

• The total square footage of the component
• The distance to the nearest active fault
• The height of the attachment relative to the building height (z/h)
• The structural material of the primary frame (steel vs concrete)