Plumbing · P-F6GZW

Fire-Rated Metallic Pipe Penetration Detail in Gypsum Wall Assembly

Materials

Steel Timber / Wood Metal (misc.)Gypsum / Drywall

Elements

Walls Partitions Ceilings Floors / Slabs Bracing Roof / Floor Openings

About this detail

The wall assembly consists of either nominal two-by-four wood studs spaced sixteen inches on center or minimum three-and-five-eighths-inch steel channel studs spaced up to twenty-four inches on center, finished with one-half or five-eighths-inch gypsum wallboard on both sides. A through penetrant comprising a metallic pipe, conduit, or tubing is installed concentrically or eccentrically within the opening, with an annular space ranging from zero to two inches. Approved penetrants include steel pipe, iron pipe, steel conduit, copper tubing, or flexible metal gas piping. Fill, void, or cavity material consisting of caulk or sealant is applied to specified thicknesses at the annular space, flush with both surfaces of the wall, with a minimum bead applied at the gypsum board and penetrant interface.

System No.W-L-1001 F Ratings - 1, 2, 3 and 4 Hr (See Items 2 and 3) T Ratings - 0, 1, 2, 3, and 4 Hr (See Item 3) L Rating At Ambient - less than 1 CFM/sq ft L Rating At 400 F - less than 1 CFM/sq ft 1. Wall Assembly - The 1, 2, 3 or 4 hr fire-rated gypsum wallboard/stud wall assembly shall be constructed of the materials and in the manner described in the individual U300 or U400 Series Wall or 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 (max 2 hr fire rated assemblies) or steel channel studs. Wood studs to consist of nom 2 by 4 in. (51 by 102 mm) lumber spaced 16 in. (406 mm) OC with nom 2 by 4 in. (51 by 102 mm) lumber end plates and cross braces. Steel studs to be min 3-5/8 in. (92 mm) wide by 1-3/8 in. (35 mm) deep channels spaced max 24 in. (610 mm) OC. B. Gypsum Board* - Nom 1/2 or 5/8 in. (13 or 16 mm) thick, 4 ft. (122 cm) 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 26 in. (660 mm). 2. Through Penetrant - One metallic pipe, conduit or tubing installed either concentrically or eccentrically within the firestop system. The annular space between pipe, conduit or tubing and periphery of opening shall be min of 0 in. (0 mm) (point contact) to max 2 in. (51 mm). Pipe, conduit or tubing to be rigidly supported on both sides of wall assembly. The following types and sizes of metallic pipes, conduits or tubing may be used: A. Steel Pipe - Nom 24 in. (610 mm) diam (or smaller) Schedule 10 (or heavier) steel pipe. B. Iron Pipe - Nom 24 in. (610 mm) diam (or smaller) service weight (or heavier) cast iron soil pipe, nom 12 in. (305 mm) diam (or smaller) or Class 50 (or heavier) ductile iron pressure pipe. C. Conduit - Nom 6 in. (152 mm) diam (or smaller) steel conduit or nom 4 in. (102 mm) diam (or smaller) steel electrical metallic tubing D. Copper Tubing - Nom 6 in. (152 mm) diam (or smaller) Type L (or heavier) copper tubing E. Copper Pipe - Nom 6 in. (152 mm) diam (or smaller) Regular (or heavier) copper pipe. F. Through Penetrating Product* - Flexible Metal Piping - The following types of steel flexible metal gas piping may be used: 1. Nom 2 in. (51 mm) diam (or smaller) steel flexible metal gas piping. Plastic covering on piping may or may not be removed on both sides of floor or wall assembly. OMEGA FLEX INC 2. Nom 1 in. (25 mm) diam (or smaller) steel flexible metal gas piping. Plastic covering on piping may or may not be removed on both sides of floor or wall assembly. TITEFLEX CORP A BUNDY CO 3. Nom 1 in. (25 mm) diam (or smaller) steel flexible metal gas piping. Plastic covering on piping may or may not be removed on both sides of floor or wall assembly. WARD MFG INC 3. Fill,Void or Cavity Material* - Caulk or Sealant - Min 5/8. 1-1/4,1-7/8 and 2-1/2 in. (16, 32, 48 and 64 mm) thickness of caulk for 1, 2, 3 and 4 hr rated assemblies, respectively, applied within annulus, flush with both surfaces of wall. Min 1/4 in. (6 mm) diam bead of caulk applied to gypsum board/penetrant interface at point contact location on both sides of wall. The hourly F Rating of the firestop system is dependent upon the hourly fire rating of the wall assembly in which it is installed, as shown in the following table. The hourly T Rating of the firestop system is dependent upon the type or size of the pipe or conduit and the hourly fire rating of the wall assembly in which it is installed, as tabulated below: +When copper pipe is used, T Rating is 0 hr. 3M COMPANY - CP 25WB+ caulk or FB-3000 WT sealant, *Bearing the UL Classification Marking Max Pipe or Conduit Diam in. (mm) F Rating Hr T Rating Hr 1 (25) 1 or 2 0+, 1 or 2 1 (25) 3 or 4 3 or 4 4 (102) 1 or 2 0 6 (152) 3 or 4 0 12 (305) 1 or 2 0 SECTION A-A 2 3 1A 1B 3 2 A A CEILING

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