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Do I have to have a fire damper in a duct that is routed through the roof and over a fire wall that returns to the other side of the firewall ?

Question asked by gbumb on Jun 13, 2017
Latest reply on Jun 15, 2017 by milt.werner

I have a customer who wants me to install a material conveying duct (air conveyed) up and over a fire wall instead of penetrating the wall and installing a fire damper.   Where in the codes does it discuss this ?