You will have to put ESFR sprinklers under the 30" wide duct as it is over 24" wide. As for the 24" wide duct, the ESFR sprinkler heads need to be at least 2'-0" horizontally from the edge of the duct. If the 24" duct is unable to be moved, then you will either have to put heads under it as well.
TYSON SUTHERLAND, CET NICET Level III Design Technician Ohio ASSD #8495 2900 Newpark Drive Barberton, OH 44203 888-857-2817 x317 330-600-0697 Cell [email protected] -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Fpdcdesign via Sprinklerforum Sent: Thursday, December 9, 2021 2:36 PM To: Sprinklerforum <[email protected]> Cc: Fpdcdesign <[email protected]> Subject: Obstructions below ESFR sprinklers BE ADVISED - This email originated outside EMCOR. I am working on a project with an ESFR system and we have some ductwork installed below it. The duct system is T shaped with 24” wide section 50 ft long and 30” wide section 12’-6” long protruding from the center of the 24”. The top of the duct is 3’-8” below the sprinkler deflector. Section 8.12 (2013 edition) is kind of vague on obstruction distances below the ESFR sprinklers. Does anyone have any insight or experience that they would like to share on this? Thanks. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (tel:860-535-2080) (ofc) 860-554-7054 (tel:860-554-7054) (fax) 860-608-4559 (tel:860-608-4559) (cell) _______________________________________________ Sprinklerforum mailing list [email protected] https://urldefense.com/v3/__http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org__;!!FaxH778!LFCQj51g2L3rbuSbKQquxmREP8zAE0A9cMyjgfHDdt5LnnlzuyYd15W7p1qGDJpaYTHkqm8$ This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
