System No. W-L-2015August 28, 2002
F Ratings — 1 and 2 Hr (See Item 1)
FT Ratings — 0 and 1 Hr (See Item 1)
FH Ratings — 1 and 2 Hr (See Item 1)
FTH Ratings — 0 and 1 Hr (See Item 1)
System tested with a pressure differential of 50 Pa between the exposed and the unexposed surfaces with the higher pressure on the exposed side.
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 U300 or U400 Series Wall and Partition Designs in the UL Fire Resistance Directory and shall include the following construction features:
Wall framing shall consist of wood studs or steel channel studs. Wood studs to consist of 2 by 4 in. lumber spaced 16 in. OC. Steel studs to be min 3-1/2 in. wide and spaced max 24 in. OC.
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 U300 or U400 Wall and Partition Design. Max diam of opening is 2 in. The hourly rating of the firestop system is equal to the hourly F Rating of the wall assembly in which it is installed. The hourly T Ratings are 0 and 1 hr when installed in 1 and 2 hr rated wall assemblies, respectively.
2. Through Penetrants
One nonmetallic pipe to be installed either concentrically or eccentrically within the firestop system. The annular space between the nonmetallic pipe and the periphery of opening shall be min 3/8 in. to max 3/4 in. Pipe to be rigidly supported on both sides of wall assembly. The following types and sizes of nonmetallic pipes may be used:
A. Acrylonitrile Butadiene Styrene (ABS)
Nom 2 in. diam (or smaller) Schedule 40 cellular or solid core ABS pipe for use in vented (drain, waste or vent)
3. Firestop System
The firestop system shall consist of the following:*Bearing the UL Classification Mark
A. Packing Material
Foam backer rod firmly packed into opening as a permanent form. Packing material is to be recessed from both surfaces of wall as required to accommodate the required thickness of fill material.
B. Fill, Void or Cavity Material* —
Min 5/8 in. thickness of fill material applied within the annulus flush with both surfaces of wall. RECTORSEAL Biostop 500+