I think you would have to treat it like a beam and apply the beam rule or 1/2 space sprinkler heads on each side of the wall. Dewayne
-----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of B.J. Newlin Sent: Friday, July 17, 2015 9:17 AM To: [email protected] Subject: ESFR Obstructions against a wall We have a client who is building a new demising wall in an existing ESFR protected warehouse. The architect decided to build a 24" box around the 30" deep girder. With the demising wall extended down from the bottom of the box to the floor. The box extends 8" from the side of the wall. NFPA 13 doesn't have an against the wall obstruction detail that shows acceptable distances from these type of obstructions as it relates to ESFR heads. My assumption is that the existing head will need to be moved 6" to comply with section 8.12.5.3.1 (3) "Additional sprinklers shall not be required where the obstruction is 1 ft (0.3 m) or less in width and located a minimum of 1 ft (0.3 m) horizontally from the sprinkler." But since there isn't a specific detail, I though I would check with all of you. I have included a rough sketch for those of you who do better visually. Thanks in advance! [ X= Head ] [ ] [ ] X 6" [ Deflector is 1'-6" ] [ Above the bottom of ] [ of the soffit ] ------------- [ ] -------------- 8" [ ] [ ] [ ] B.J. Newlin Service Manager Aegis Fire Protection LLC [email protected] P (913) 825-0343 F (913) 322-4475 C (913) 238-0035 “Whoever is careless with the truth in small matters cannot be trusted with important matters” ― Albert Einstein _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
