what Mark said EXCEPT why 130 sf. The ceiling is the insulation. The structural embers are a different area (just like above a drop ceiling). The annex states regarding distance below ceiling but it obviously applies across the board. For instance, if the only combustible construction is the structural members and they joist are full (and chords covered) does the space still have to be protected? There was a pubic input submitted on just this issue. IT passed the table vote but the official ballot has not yet been processed.
The rub is the lack of guidance on the robustness of attachment. NFPA TC member caveat warranted: not to be considered a formal interpretation by NFPA or any of its technical committees Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Nov 22, 2016, at 8:37 AM, Mark Phillips <[email protected]> wrote: > > Insulation is considered ceiling A8.5.4.1 > 130 spacing > Use 4.2 heads > Reduce Remote Area > Aka > “What Travis said” > >
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