Fire Protection · G-QK9NC

UL Firestop System Wall Penetration Detail

Materials

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

Elements

Walls Partitions Insulation Roof / Floor Openings

About this detail

A UL-classified firestop system for cable and conduit penetrations passes through one- and two-hour fire-rated gypsum board and steel stud wall assemblies. The wall construction incorporates minimum 3-1/2 inch wide steel channel studs spaced 24 inches on center with gypsum board layers conforming to UL series designs. Firestop devices accommodate penetrants including copper telecommunication cables, control cables, power cables, and fiber optic cables up to maximum fill percentages. The assembly achieves specified F, T, L, and FH fire resistance ratings in accordance with ANSI/UL1479 and CAN/ULC S115 standards.

ANSI/UL1479 (ASTM E814) CAN/ULC S115 F Ratings - 1 and 2 Hr (See Item 1) F Ratings - 1 and 2 Hr (See Item 1) T Ratings - 1/2 and 1 Hr (See Item 2) FT Ratings - 1/2 and 1 Hr (See Item 2) L Rating At Ambient - 1.2 and Less Than 1 CFM per Device (See Items 2, 3A and 3A1) FH Ratings - 1 and 2 Hr (See Item 1) L Ratings At 400 F - 1.3, 1.6 and Less Than 1 CFM per Device (See Items 2, 3A and 3A1) FTH Ratings - 1/2 and 1 Hr (See Item 2) L Rating At Ambient - 1.2 and Less Than 1 CFM per Device (See Items 2, 3A and 3A1) L Ratings At 400 F - 1.3, 1.6 and Less Than 1 CFM per Device (See Items 2, 3A and 3A1) SECTION A-A A A CONFIGURATION A CONFIGURATION B A A Classified by Underwriters Laboratories, Inc. to UL 1479 and CAN/ULC-S115 R System No. W-L-3384 C C L A S S I F I E D US 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 described in the individual U400, V400 or W400 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 3-1/2 in. (89 mm) wide and spaced 24 in. (610 mm) OC. B. Gypsum Board* — The gypsum board type, thickness, number of layers, fastener type and sheet orientation shall be as specified in the individual U400, V400 or W400 Series Designs in the UL Fire Resistance Directory. Maximum five individual openings may be provided (see Item 3A). Diam of opening for each firestop device shall not exceed 4-1/2 in. (114 mm) and shall be sized to the OD of the firestop device. The hourly F and FH Ratings of the firestop system are equal to the hourly fire rating of the wall assembly in which it is installed. 2. Cables — The aggregate cross-sectional area of cables in firestop device to be min 0 percent (blank) to max 100 percent visual fill. Cables to be tightly bundled within the device and rigidly supported on both sides of wall assembly. Any combination of the following types and sizes of cables may be used: A. Max 100 pair No. 24 AWG (or smaller) copper conductor telecommunication cable with polyvinyl chloride (PVC) jacketing and insulation. B. Max 7/C No. 12 AWG copper conductor control cable with PVC or XLPE jacket and insulation. C. Max 4/0 AWG Type RHH ground cable. D. Max 4 pr No. 22 AWG Cat 5 or Cat 6 computer cables. E. Max RG 6/U coaxial cable with fluorinated ethylene insulation and jacketing. F. Fiber optic cable with polyvinyl chloride (PVC) or polyethylene (PE) jacket and insulation having a max diam of 1/2 in. (13 mm). G. Max 20/C No. 22 AWG shielded printer cable with PVC jacket. H. Through-Penetrating Product* - Two copper conductors No. 18 AWG (or smaller) Power or Non Power Limited Fire Alarm Cable with or without a jacket under a metal armor. AFC CABLE SYSTEMS INC I. Max. 1/4 in. (6 mm) diameter S-Video Cable consisting of 2 max 24 AWG 75 ohm coax or twisted pair cable with PE insulation and PVC jacket . J. Max 3/C No 12 AWG MC Cable. K. Through Penetrating Product* — Any cables, Armored Cable+ or Metal Clad Cable+ currently Classified under the Through Penetrating Product category. See Through Penetrating Product (XHLY) category in the Fire Resistance Directory for names of manufacturers. For opening with cables, the T, FT and FTH Ratings are 1/2 hr. For blank opening (no cables), when the hourly rating of the wall assembly is 2 hr, the T, FT and FTH Ratings are 1 hr. For blank opening (no cables), when the hourly rating of the wall assembly is 1 hr, the T, FT and FTH Ratings are 1/2 hr. L Ratings vary depending on whether the gasketing material (see Item 3) or the sealant (Item 4) is used. See Table below for L Ratings. 3A 2 1A 1B 3A 2 3B 3A 2

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