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Hilti Firestop Systems Sheet Drawing No. HILTI, Inc. Date Scale Saving Lives through Innovation and Education WJ 1 of 2 5/64" = 1" UL/cUL SYSTEM NO. W-J-7112 F-RATING = 2-HR. T-RATING = 0-HR. OR 2-HR. INSULATED SHEET METAL DUCT THROUGH CONCRETE OR CONCRETE BLOCK WALL Tulsa, Oklahoma USA (800) 879-8000 A SECTION A-A FRONT VIEW A MAXIMUM 6" C/C SPACING 1 2 3 4 5 6 7112d Sep. 19, 2018 WJ7112d.091918