I would think that the obstruction rules of NFPA 13 Ch 8 would apply to the
ESFR (i.e. 36" clear below deflector) regardless of the hazard. ESFR's were
developed and listed by U.L. with additional room below the head to allow for
the "Discharge Umbrella" to develop.
Just my opinion... John W. Farabee,
On Wednesday, August 31, 2016 1:37 PM, Gregg Fontes <[email protected]>
wrote:
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div.yiv0122441544WordSection1 {}-->2016 NFPA 13 – 8.4.6.6 Occupancy and Hazard.
(Handbook) In an existing warehouse building being converted to a non-storage
use, the existing ESFR sprinklers can remain in place provided the new use is
either light or ordinary hazard. My questions is if it is ordinary hazard
occupancy, do the ESFR obstruction rule apply or due the obstruction rules for
standard systems apply (i.e. conventional)? As an example, would 30” x 48”
lights be allowed to hang below the ESFR sprinkler and not be considered an
obstruction? Same with new duct work greater than 24”? Etc.
Thanks, Gregg Fontes Cen-Cal Fire Systems, Inc. 209-334-9119
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