W-L-6018

F Ratings — 1 and 2 Hr (See Item 1)

T Rating — 1 Hr

1. Wall Assembly — The 1 or 2 hr fire-rated gypsum board/stud 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 include the following construction features:
A. Studs — Wall framing shall consist of steel channel studs. Steel studs to be min 3-5/8 in. wide and spaced max 24 in. OC. Additional framing members shall be used to completely frame around opening.
B. Gypsum Board* — Min 5/8 in. thick, 4 ft wide with square or tapered edges. The gypsum board type, thickness, number of layers and orientation shall be as specified in the individual U400 Wall and Partition Design. Max size of opening is 384 sq in. with a max dimension of 32 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. Cable Trough+ — Nom 12 in. wide by 4 in. deep telecommunication cable trough formed from min 0.105 in. thick acrylonitrile butadiene styrene (ABS). A max of two cable troughs to be installed in the opening. The annular space between the cable trough and the periphery of the framed opening shall be min 1 in. to max 6-1/2 in. The nom annular space between the cable troughs shall be a nom 1 in. Cable trough to be rigidly supported on both side of the wall assembly.

3. Cables — Aggregate cross-sectional area of cables in cable trough not to exceed 40 percent of the cross-sectional area of the cable trough. Any combination of the following types and sizes of cables may be used:
A. Max 72 fibers - 62.5/125 fiber optic cable with polyvinyl chloride (PVC) insulation and jacket materials.
B. Max RG/U (or smaller) coaxial copper conductor cable with fluorinated ethylene insulation and PVC jacket materials.

4. Firestop System — The firestop system shall consist of the following:
A. Fill, Void or Cavity Materials* — Bags — Nom 13-1/2 in. long by 7 in. wide by 1/2 to 1-1/2 in. thick fabric covered intumescent bags. Bags to be tightly packed between cables and periphery of framed opening and between cable troughs and periphery of framed opening. Bags to be installed with 7 in. dimension projecting through and centered within the opening.
RECTORSEAL — FlameSafe Bags

B. Wire Lath — Nom 1 in. diamond shaped wire lath fabricated from min No. 20 AWG galv steel wire. Wire lath cut to fit the contour of the opening with a min 3 in. lap beyond the periphery of the opening. Wire lath secured to framing members on both surfaces of wall assembly by means of 2-1/4 in. long Type S steel screws in conjunction with 1/4 in. by 1-1/2 in. diam steel fender washers, spaced 6 in. OC. The joints within the wire lath shall overlap a min of 2 in. and be secured together by means of No. 20 AWG steel wire spaced 4 in. OC.

+ Bearing the UL Listing Mark