F Ratings — 1 & 2 Hr (See Item 1)

T Rating — 1 Hr

    1. Wall Assembly — The 1 or 2 h fire-rated gypsum wallboard/stud wall assembly shall be constructed of the materials and in the manner specified in the individual U300 or U400 Series Wall and Partition Designs in the UL Fire Resistance Directory and shall include the following construction features:
      A. Studs — Wall framing may consist of either wood studs or steel channel studs. Wood studs to consist of nom 2 by 4 in. lumber spaced 16 in. OC. Steel studs to be min 2-1/2 in. wide and spaced max 24 in. OC.
      B. Gypsum Board* — 5/8 in. thick, 4 ft wide with square or tapered edges. The gypsum wallboard type, thickness, number of layers, fastener type and sheet orientation shall be as specified in the individual U300 or U400 Series Design in the UL Fire Resistance Directory. Max diam of opening is 18 in.

      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 Wire Mesh — Cylindrical sleeve fabricated from No. 8 steel wire mesh and having a min 1 in. lap along the longitudinal seam. Length of steel wire mesh to be 4-1/2 in., centered and formed to fit periphery of through opening.
    3. Steel Pipe — Nom 10 in. diam (or smaller) Schedule 10 (or heavier) steel pipe. One pipe to be installed either concentrically or eccentrically within the firestop system. Pipe to be rigidly supported on both sides of wall assembly.
    4. Pipe Covering* — Nom 3 in. thick hollow cylindrical heavy density (min 3.5 pcf) glass fiber units jacketed on the outside with an all service jacket. Longitudinal joints sealed with metal fasteners or factory-applied self-sealing lap tape. Transverse joints secured with metal fasteners or with butt tape supplied with the product. The annular space shall be min 1/2 in. to max 3/4 in.

    See Pipe and Equipment Covering — Materials (BRGU) category in the Building Materials Directory for names of manufacturers. Any pipe covering material meeting the above specifications and bearing the UL Classification Marking with a Flame Spread Index of 25 or less and a Smoke Developed Index of 50 or less may be used.

    5. Metal Jacket — Min 6 in. wide jacket formed of min 0.019 in. thick steel sheet cut to wrap tightly around the pipe insulation with a min 4-1/2 in. lap. Jacket secured with steel tie wires located 2 in. from each surface of the wall. Jacket to be installed on both surfaces of wall and recessed into the opening 1/2 in.
    6. Firestop System — The firestop system shall consist of the following:
      A. Packing Material — Min 1 in. thickness of min 4.5 pcf mineral wool batt insulatiom firmly packed into opening as a permanent form. Packing material to be recessed from both surfaces of wall as required to accommodate the required thickness of fill material.
      B. Fill, Void or Cavity Material* — Caulk — Min 2 in. thickness of fill material applied within the annulus, flush with both surfaces of wall.

      RECTORSEAL — Metacaulk 1000


XHEZ.W-L-5061 W-L-5061 XHEZ 613495002 System ACTIVE 19961005 19961005 613495002