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Sprinkler System Obstruction

Question asked by on Dec 11, 2017
Latest reply on Dec 14, 2017 by turnkey1090

At what point does a ceiling grid become an obstruction for a sprinkler system? I have a project where hat channel was installed to later install the ceiling. The ceiling was deleted. The sprinkler system was altered, changed to uprights, leaving the grid in place. I believe the hat channel grid will disrupt the spray pattern making it ineffective. I'm looking for something in the codes to corroborate this or allow this.