Since sidewall sprinklers must be installed below smooth, flat ceilings, when I am confronted by beams installed perpendicular to the wall in which sidewall sprinklers are installed, I always install sidewalls below the smooth flat ceiling of each beam pocket.
My challenger suggests that if the "Obstruction Along Wall" rules of NFPA 13 Figs. 10.3.6.1.4 (2019 ed.) / 126.96.36.199.4 (2016 ed.) for standard spray sidewalls is met* then you can "skip" a beam pocket if the overall spacing and coverage is met.
Can you skip a beam pocket with a sidewall?
My opinion is that these are not intended for continuous obstructions such as beams, which adversely affect heat collection.
Y'all on my side?
*or the relevant figures for extended coverage sidewalls, or via the MeyerFire Sprinkler Obstruction Tool are met
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