according with NFPA 13 "220.127.116.11* Beneath Turbine Generator Operating Floor. All areas beneath the turbine generator operating floor shall be protected by an automatic sprinkler or foam-water sprinkler system meeting the following criteria: (1) The sprinkler system beneath the turbine generator shall be designed around obstructions from structural members and piping. (2) The sprinkler system shall be designed to a minimum density of 0.3 gpm/ft2 (12.2 L/min·m2) over a minimum application of 5000 ft2 (464.5 m2). [804:10.8.2.1]".
My question is: in case the floor beneath the turbine generator is smaller than 464.5 m2, should I design the sprinkler system for the same flow rate (12.2 L/min * m2 x 464.54 m2) or is it possible to apply only the density of 12.2 L/min*m2 just for the actual surface of the floor?