Fire Protection · F-CHC6Y

NFPA 13 Area Reduction

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This diagram provides the hydraulic design area reduction criteria for quick-response fire sprinkler systems per NFPA 13-2016 Edition 11.2.3.2.3.1. It plots the percent reduction to the design area on the y-axis against ceiling height in feet on the x-axis for wet pipe systems meeting light hazard requirements. The application requires a maximum 20-foot ceiling height and prohibits unprotected ceiling pockets exceeding 32 square feet. Mathematical formulas define the reduction curve based on specific ceiling height ranges.

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