It's not a metal deck, it's a poured-in-place-concrete-reinforced metal deck. The cited section is for attaching to unreinforced metal deck such as roof decks with nothing more than insulation or build up composition roof on top.
Steve L. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Daniel Adams Sent: Monday, November 21, 2011 1:14 PM To: [email protected] Subject: Re: Hanger question (NFPA 13, 2007 edition) It is 4" total thickness on 1" non-composite metal deck. On Mon, Nov 21, 2011 at 1:50 PM, Matt Grise <[email protected]> wrote: > How thick is the concrete? > > Matt Grisé PE*, LEED AP > Sales Engineer > Alliance Fire Protection > 130 w 9th Ave. > North Kansas City, MO 64116 > > *Licensed in KS & MO > > 913.888.0647 ph > 913.888.0618 f > 913.927.0222 cell > www. AFPsprink.com > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Daniel Adams > Sent: Monday, November 21, 2011 2:48 PM > To: [email protected] > Subject: Hanger question (NFPA 13, 2007 edition) > > On a current government project, piping has been hung from a concrete > filled metal deck using expansion shells (drop-in). After giving the > okay to use this type of hanger, an inspector has referenced : > "9.2.1.4.1 Metal Deck. 9.2.1.4.1 * Branch line hangers attached to > metal deck shall be permitted only for the support of pipe 1 in. (25 > mm) or smaller in size, by drilling or punching the vertical portion > of the metal deck and using through bolts." and in Annex A, it says > that "A.9.2.1.4.1 The requirements of 9.2.1.4.1 are based on metal > decks only but can be applied to other applications such as concrete > or gypsum-filled metal decks". > > In 9.1.3 Fasteners in Concrete, it notes that "Unless prohibited by > 9.1.3.2 or 9.1.3.3, the use of listed inserts set in concrete and > listed post-installed anchors to support hangers shall be permitted > for mains and branch lines. > 9.1.3.2 Post-installed anchors shall not be used in cinder concrete, > except for branch lines where the post-installed anchors are > alternated with through-bolts or hangers attached to beams. > 9.1.3.3 Post-installed anchors shall not be used in ceilings of gypsum > or other similar soft material. > > The expansion shells are in the concrete portion of the deck (the > metal decking has been drilled to permit the expansion shells to be > inserted into the concrete). Doesn't this comply with 9.1.3 ? > > Daniel N. Adams > Designer > > Interwest Fire Protection, Inc. > 404 Ironwood Drive > Salt Lake City, UT 84115 > > Phone: (801) 746-4040 > Fax: (801) 746-4043 > [email protected] > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum -- Daniel N. Adams Designer Interwest Fire Protection, Inc. 404 Ironwood Drive Salt Lake City, UT 84115 Phone: (801) 746-4040 Fax: (801) 746-4043 [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
