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
