A restaurant service area has an 18 ft (5.

In a restaurant service area with an 18 ft high T-Bar ceiling and using quick-response sprinklers in a wet system, the minimum area and density that should be calculated is typically 0.15 gpm over 1,080 ft² (6.1 mm/min over 100.3 m²), considering the ceiling height and occupancy.

References: NFPA 13 includes design criteria for various occupancies and ceiling types, guiding the selection of appropriate design area and density for sprinkler systems.