If it's not a concrete tee, then I don't think you're going to be able to exceed 22" from the deck.
-Kyle M -----Original Message----- From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org> On Behalf Of Dennis Wilson via Sprinklerforum Sent: Monday, February 1, 2021 3:08 PM To: sprinklerforum@lists.firesprinkler.org Cc: Dennis Wilson <dwil...@blackhawksprinklers.com>; Dale Wingard <dwing...@hillercompanies.com> Subject: [EXTERNAL] RE: Pan-Type Construction Around 20", so the deflector is over 22" the top of the pans. But only 4" below the stems. -----Original Message----- From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org> On Behalf Of Dale Wingard via Sprinklerforum Sent: Monday, February 1, 2021 4:03 PM To: sprinklerforum@lists.firesprinkler.org Cc: Dale Wingard <dwing...@hillercompanies.com> Subject: RE: Pan-Type Construction I am picturing a concrete waffle pattern. What is the depth of the pan? Regards, Dale F. Wingard, SET Designer Commercial/Marine Division NICET IV #76284 Water-based Systems Hiller Systems A Division of The Hiller Companies, Inc. 3751 Joy Springs Drive Mobile, AL 36693 c: 251.509.7108 o: 251.661.1275 ext. 10145 HillerFire.com Protecting life and property since 1919 -----Original Message----- From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org> On Behalf Of Steve Leyton via Sprinklerforum Sent: Monday, February 1, 2021 4:00 PM To: sprinklerforum@lists.firesprinkler.org Cc: Steve Leyton <st...@protectiondesign.com>; Dennis Wilson <dwil...@blackhawksprinklers.com> Subject: RE: Pan-Type Construction Do you mean Tee or Double-Tee construction? Pan slabs are PIP, with and without metal decks, smooth ceiling by definition. Steve L. -----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Dennis Wilson via Sprinklerforum Sent: Monday, February 01, 2021 1:52 PM To: sprinklerforum@lists.firesprinkler.org Cc: Dennis Wilson <dwil...@blackhawksprinklers.com> Subject: Pan-Type Construction Would anyone know what the maximum depth is allowed in concrete pan-type construction? I have a job with exist. sprinklers installed along the bottom of the stems with pendents. The AHJ is questioning whether sprinklers are needed in each pocket. 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