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
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