Is Sprinkler Obstructed by Duct?
An 18-inch deep x 3-foot wide duct is located with the top of the duct 20 inches below the upright sprinkler deflector. The sprinkler is centered above the duct. NFPA 13 (2016 Edition) has the 3x rule (188.8.131.52.1.3) which only applies to structural members in light and ordinary occupancies, and the duct is not over 4-feet wide which would require sprinklers by 184.108.40.206.3. Is this arrangement acceptable by code?
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9/27/2017 08:11:58 am
Intent of the code is met
Patrick Turner, P.E.
9/27/2017 08:49:48 am
First of all, what type of upright are we dealing with (standard spray, extended coverage, residential, CMSA, ESFR, etc.)?
5/11/2020 03:52:59 pm
How about if the ESFR sprinkler is a pendant with ductwork being the obstruction?
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