Patent ID: 7798239

Claim:
A ceiling-only dry sprinkler system for a storage occupancy, the storage occupancy defining a ceiling height, a storage configuration, and a defined storage height, the system comprising: a riser assembly including a control valve having an outlet and an inlet; a first network of pipes and a second network of pipes disposed about the riser assembly, the first network of pipes defining a volume containing a gas in communication with the outlet of the control valve and further including a plurality of sprinklers having at least one hydraulically remote sprinkler relative to the outlet of the control valve and further having at least one hydraulically close sprinkler relative to the outlet of the control valve, each of the plurality of sprinklers has a deflector and is thermally rated to thermally trigger from an inactivated state to an activated state to release the gas, the second network of pipes having a wet main in communication with the inlet of the control valve to provide controlled fluid delivery to the first network of pipes; a first mandatory fluid delivery delay period defining the time of fluid delivery from the control valve to the at least one hydraulically remote sprinkler; and a second mandatory fluid delivery delay period defining the time of fluid delivery from the control valve to the at least one hydraulically close sprinkler.