Sprinklers above the egg crate will have obstructed flow spray pattern. How far below the deck are the sprinklers in the egg crate ceiling?
If more than 12"??? Art Tiroly ATCO Fire Protection/Tiroly 24400 Highland Rd CLE 44143 216-621-8899 216-570-7030 cell From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of J.P. Merlino/Ing. L.Lagomarsino & Asoc. Sent: Thursday, September 15, 2016 6:00 PM To: sprinklerforum@lists.firesprinkler.org Subject: Open-Grid Ceilings - Egg crate Dear Sirs: NFPA 13 Ed. 2016 - 8.15.14 If we have an open grid egg-crate that meets 70% open space but the depth of the material (2 in) exceeds the least dimension (1 in) it does not comply with the allowance not to install sprinkler beneath and we must install in the egg-crate (or beneath). But the standard is silent on what to do with the space over the egg-crate. Shall we have two layers of sprinklers, one in the egg-crate and the other over the egg-crate as if the egg-crate does not exist? I appreciate your thoughts or if we are missing something. best regards J.P. Merlino --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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