The following fire resistant assembly designs are listed in accordance with ASTM-E119 (Fire Tests of Building Construction and Materials), CAN/ULC-S101 (Standard Methods of Fire Endurance Tests of Building Construction and Materials), NFPA-251 (Fire Tests of Building Construction and Materials), UBC-7-1 (formerly UBC-43-1), (Uniform Building Code Standard).

2. SUB-FLOORING: Sub-floor panels to conform to one of the following:

NOTE: All plywood are to be produced with adhesive qualified as interior use/exterior grade (exposure 1) or better.

Unless otherwise noted, panels are T & G, maximum width 48" with long dimensions installed perpendicular to joists. End joists are staggered Minimum 24" and butted over joists.

Unless otherwise noted, Minimum nominal thickness of sub-flooring is:

3. SUB-FLOORING FASTENING: Minimum length of fastener for sheathing and subfloor attachment for thickness from 5/8" (15.9mm) to 3/4' (19mm) thick is: a) Common or Spiral Nail: 2" (51mm) (Canada); 8d (0131" dia. x 2.5" long) (US) b) Ring Thread Nail: 1-3/4" (45mm) (Canada); 6d (0.120" dia. x 2" long) (US) Nail spacing shall be 6" (150mm) oc along butt edges of panel and 12" (300mm) (Canada) and 10" (US) oc along intermediate support.

4. STRUCTURAL MEMBERS: Listed fire designs are based on systems designed for structural and functional performance in accordance with Truswal Systems Corp. procedures. All designs are tested in unrestrained configuration. The chord materials are structural rated lumber material as graded under NLGA-1993 Standard Grading rules for Canadian Lumber or graded by an inspection bureau or agency approved by the United States Department of Commerce Board of Review of the American Lumber Standards Committee with chord sizes of 3x2, 4x2, 5x2.

Truswal Space-Joist Series: Unless otherwise specified, this includes TW 10V20, 12V20, 16V20, 10V2, 12V2, 14V2, 16V2 metal webs having a minimum depth of 9-1/4" and spaced up to a maximum of 24" oc for floor/ceiling systems. Truswal FlorTrus Series: Unless otherwise specified, this includes wood web floor truss designs with metal truss plates manufactured by Truswal Systems Corp. having a minimum depth of 10" and spaced up to maximum of 24" oc for floor/ceiling systems.

5. RESILIENT CHANNEL: Can be used in all cases, directly applied to joists. Minimum requirements is 26 gauge galvanized steel. Unless otherwise noted, maximum spacing is 24" oc, perpendicular to joists and fastened to each joist with one 1-1/4" Type S drywall screw. Double rows of furring channels at each gypsum wall board joint (at least 3" apart).

6. GYPSUM BOARD: All Gypsum Board is listed 5/8" (15.9mm) Type X, unless otherwise noted. In certain cases, as noted, it may be specific proprietary type with other designations identified in conjunction with the manufacturer's name. Maximum width is 48" and unless otherwise noted, all exposed joints are taped and finished with two additional coats of joint compound. Screw heads are covered with two coats of joint compound.

7. BRIDGING/STRONGBACK: 2 x 6 Bridging/Strongback to be attached to each bottom chord of the assembly with two 3" screws and to be spaced at 7' oc.

8. INSULATION: All batts are to be placed between bottom joist flanges and supported by metal furring channels. In assemblies where metal furring channels are not utilized, support insulation batts on nominal 1" x 3" wood furring strips spaced 16" oc along the top side of the bottom flange. Equivalent methods that retain insulation above joist bottom flange are acceptable. All butt joints shall be over furring channels.

9. SUSPENDED CEILING SYSTEM: Any suspended ceiling system may be selected which satisfies the following criteria:

a. It must be a fire rated system, and be installed within the terms of its listing
b. It must have a finish rating equal to or greater than the finish rating required by the suspended ceiling design.
c. It must be suspended in accordance with the terms of its listing and a minimum of 7-1/2" below the joist.
d. Penetrations such as ducts, air diffusers, and fixtures must be protected in such a manner as to conform to the terms of the listing of the suspended ceiling system.