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Sheet Drawing No. HILTI, Inc. Tulsa, Oklahoma USA (800) 879-8000 Date Scale cUL 1 of 2 5/32" = 1" Feb. 13, 2007 cUL SYSTEM NO. W-L-2028 cUL WL2028c.021307 CANADA ONLY F-RATING = 1-HR. OR 2-HR. FT-RATING = 0-HR. OR 1-HR. FH AND FTH-RATINGS = 0-HR. NOTE : TESTED WITH A 50 Pa PRESSURE DIFFERENTIAL A A 1 2 3 4 5 6