System No. F-C-2066

F Rating — 2 Hr

T Rating — 2 Hr

1. Floor-Ceiling Assembly The 2 hr fire-rated wood joist floor-ceiling assembly shall be constructed of the materials and in the manner specified in Design No. L505, L511 or L536 in the UL Fire Resistance Directory, as summarized below:

A. Flooring System Lumber or plywood subfloor with finish floor of lumber, plywood or Floor Topping Mixture* as specified in the individual Floor-Ceiling Design. Max diam of floor opening is 3-3/4 in.

B. Wood Joists Nom 2 by 10 in. lumber joists spaced 16 in. OC with nom 1 by 3 in. lumber bridging and with ends firestopped.

C. Furring Channels (Not Shown) — Resilient galv steel furring installed perpendicular to wood joists between first and second layers of wallboard (Item 1D) and spaced max 24 in. OC.

D. Gypsum Board* Nom 4 ft wide by 5/8 in. thick as specified in the individual Floor-Ceiling Design. First layer of wallboard nailed to wood joists. Second layer of wallboard screw-attached to furring channels.

2. Chase Wall The through penetrant (Item 3) shall be routed through a 2 hr fire-rated single, double or staggered wood stud/gypsum wallboard chase wall constructed of the materials and in the manner specified in the individual U300 Series Wall and Partition Designs in the UL Fire Resistance Directory and shall include the following construction features:

A. Studs Nom 2 by 6 in. lumber or double nom 2 by 4 in. lumber studs.

B. Sole Plate Nom 2 by 6 in. lumber or parallel 2 by 4 in. lumber plates, tightly butted.

C. Top Plate The double top plate shall consist of two nom 2 by 6 in. lumber plates or two sets of nom 2 by 4 in. lumber plates, tightly butted. Max diam of opening is 3-3/4 in.

D. Gypsum Board* Thickness, type, number of layers and fasteners shall be specified in individual Wall and Partition Design.

3. Through Penetrant One nonmetallic pipe or tube to be installed either concentrically or eccentrically within the firestop system. The annular space to be min 5/8 in. to max 3/4 in. Pipe or tube to be rigidly supported on both sides of floor. The following types and sizes of pipes may be used:

A. Polyvinyl Chloride (PVC) Pipe Nom 2 in. diam (or smaller) Schedule 40 cellular or solid core PVC pipe for use in closed (process or supply) or vented (drain, waste or vent) piping systems.

B. Acrylonitrile Butadiene Styrene (ABS) Pipe Nom 2 in. diam (or smaller) Schedule 40 cellular or solid core ABS pipe for use in closed (process or supply) or vented (drain, waste or vent) piping systems.

C. Chlorinated Polyvinyl Chloride (CPVC) Pipe Nom 2 in. diam (or smaller) SDR 17 CPVC pipe for use in closed (process or supply) or vented (drain, waste or vent) piping systems.

D. Crosslinked Polyethylene (PEX) Tubing Nom 1 in. diam (or smaller) SDR 9 PEX tube for use in closed (process or supply) piping systems.

4. Firestop System The firestop system shall consist of the following:

A. Packing Material Foam backer rod firmly packed into opening as a permanent form. Packing material to be recessed from top surface of subfloor and bottom surface of the lower top plate as required to accommodate the required thickness of fill material.

B. Fill, Void or Cavity Material* — Caulk Min 1/4 in. thickness of fill material applied within the annulus, flush with top surface of subfloor and min 3/4 in. thickness of fill material applied within the annulus, flush with bottom surface of lower top plate. RECTORSEAL — Biostop 500+