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Presented by:
Garner Palenske, Aon Fire Protection Engineering

ESFR sprinkler obstruction requirements have, for the most part, remained unaltered since the early development of the sprinkler. The requirements outlined in NFPA 13, Standard for the Installation of Sprinkler Systems, are intended to limit the obstruction from inhibiting the spray pattern of the ESFR sprinkler. These requirements are based on a limited number of tests with conservative assumptions in addition to safety factors. To substantiate and refine these requirements, the Fire Protection Research Foundation recently completed "Obstructions and ESFR Sprinklers, Phase 1." The results of this project will be presented, including review of both previous full- and small-scale testing and recent testing. Attendees will have the opportunity to expand and update their knowledge in the area of ESFR sprinklers and obstructions.