Hopefully some of the building design folks will jump in since it has been a long time since I looked at NFPA 90A (regarding protection of wall penetrations by ducts). Once upon a time, if penetrating a 1 hr wall (limited to horizontal wall penetrations and not vertical protection) as long as the duct was metal and did not have any openings within a few feet of the wall, a fire damper was NOT required in order to be considered protected.
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 Aug 24, 2016, at 10:53 AM, Mike Stossel <[email protected]> > wrote: > > The current code for this area is NFPA 13R, 2007. > > I am in a discussion with an engineer regarding the need for sprinklers in a > mechanical closet located on a balcony. My stance is that they are needed, > and the engineer is in disagreement stating that he has done this same design > all over the country, and has never protected the closet. The closet > contains mechanical equipment that is not fuel fired. A supply and return > duct penetrate the wall into the dwelling unit and are fire stopped; however, > they do not have fire dampers. It was always my understanding that for the > opening to be considered protected fire dampers are needed. When the duct > work did not contain them I have always sprinkled the closet. Am I incorrect > and have I been protecting these closets unnecessarily? > > Thanks for the help. > > > > > Mike Stossel SET > NICET Level IV > Automatic Sprinkler System Layout > 1070 38th Street > Brooklyn N.Y. 11219 > Office: 718-633-3036 ext 114 > Fax: 718-633-4593 > [email protected] <mailto:[email protected]> > www.safetyfiresprinkler.com <mailto:[email protected]> > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > <mailto:[email protected]> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > <http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org>
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