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What is a sprinkler system break? (NFPA 13)

Question asked by m.kurzawa on Jun 24, 2020
Latest reply on Jun 25, 2020 by milt.werner

In NFPA 13 (2019) point or errata 13-19-2 point specifies "Draft curtains separating ESFR sprinklers at system breaks or (...) shall be permitted."


Is a system break the space between two sections of ESFR sprinklers in one area or is it something else entirely?

If someone could explain it to me I would be grateful.


Does this mean I can use standard 20% draft curtains as per NFPA 204 (2018), and just have to provide a clear aisle of 4 ft centered below the draft curtain as per point