F Ratings - 1 and 2 Hr (See Item 1)

T Rating - 1-1/2 Hr

L Rating At Ambient - Less Than 1 CFM/sq ft

L Rating At 400 F - Less Than 1 CFM/sq ft

    1. Wall Assembly — The 1 or 2 hr fire-rated gypsum board/stud shaft wall assembly shall be constructed of the materials and in the manner specified in the individual U400 Series Wall and Partition Designs in the UL Fire Resistance Directory and shall incorporate the following construction features:
      A. Steel Studs — "C-H" or "C-T" shaped studs, min 2-1/2 in. (64 mm) wide by 1-1/2 in. (38 mm) deep, fabricated from min No. 25 gauge galv steel, spaced max 24 in. (610 mm) OC.
      B. Gypsum Board* — 1 in. (25 mm) thick, 24 in. (610 mm) wide gypsum liner panels installed vertically.
      C. Gypsum Board* — 1/2 in. or 5/8 in. (13 or 16 mm) thick, 48 in. (1.2 m) wide gypsum boards. The gypsum board type, thickness, number of layers, fastener type and sheet orientation shall be as specified in the individual Wall and Partition Design.

      The hourly F Rating of the firestop system is equal to the hourly fire rating of the wall assembly in which it is installed.

    2. Steel Sleeve — Sleeve fabricated from min No. 28 gauge galv steel vent duct. Steel sleeve to extend 1 in. (25 mm) from the surface of wall, with sleeve centered and formed to fit periphery of through opening.
    3. Firestop System — The firestop system consists of the following items:
      A. Forming Material — Min 4 pcf (64 kg/m3) mineral wool batt insulation compression fit between the sleeve and duct as a permanent form within the sleeve. The thickness of the mineral wool is to be min 4 in. (102 mm) installed from the finished side of the wall to a depth to accommodate the depth of sealant required.
      B. Fill, Void or Cavity Material* - Sealant — Fill material thickness installed to 5/8 in. (16 mm) depth on finished side of wall assembly.

      RECTORSEAL — Metacaulk Fire Rated Putty


XHEZ.W-L-0026 W-L-0026 XHEZ 613495002 SYSTEM Active 20070223 20070223 613495002