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head sprinkler position

Question asked by yayatsumirat on Nov 20, 2016
Latest reply on Dec 7, 2016 by richard.raab

At construction site for commercial building where i'm working today, there are some head sprinkler (upright type) above big supply air duct. 

the question is it is allowed to put head sprinkler above supply air duct?


Any code references or examples would be helpful.