Wall & Floor Penetration Fire Stops (FM Approval Class Number 4990)
An important technique in property loss control is the subdivision of a building into compartments and sub-compartments. This
subdivision is usually accomplished by erecting physical barriers that will limit the damage caused by an event to the room of origin.
The loss caused by the spread of fire damage can be minimized when effective compartmentation is incorporated into a building’s design.
One method of combating the spread of fire through openings in or around barriers is to properly design and install firestopping.
Firestopping is intended for use in openings in or between fire resistant walls, floor/ceiling assemblies at head of walls and at
construction joints between floors and walls.
Through penetrations submitted for Approval shall be evaluated for their ability to prevent the passage of flame through or around
openings in fire rated walls and floor/ ceiling assemblies and their ability to limit the transmission of heat through the assembly. In
addition, no openings shall develop that permit a projection of water beyond the unexposed surface during the hose stream test.
All through penetrations shall be subjected to a fire resistance test conducted in accordance with ASTM E814 (08) "Standard Method
for Fire Tests of Through-Penetrations Fire Stops” followed by a hose stream test conducted in accordance with ASTM E2226 (07),
“Practice for Application of Hose Stream”. An hourly rating will be assigned based on the time period for which it successfully met the
performance criteria.
Through penetrations that meet the fire resistance and hose stream test criteria shall be assigned three (3) separate ratings. They are
called the F rating, the T rating and the T
FM rating.
The F rating denotes the period of time which the firestop:
• Withstood the fire resistance test without developing any through openings through which flames can pass;
• Withstood the fire resistance test without the occurrence of flaming on the unexposed side of the assembly;
• During the hose stream test, did not develop any opening that allows the projection of water during the hose stream test from
the stream to the unexposed side.
The T rating shall denote the period of time which the firestop:
• Met all the criteria of the F rating;
• Limited the transmission of heat through the assembly, as measured by thermocouples located on the unexposed side of the
test assembly, as specified in ASTM E814, from exceeding a 325°F (181°C) rise above ambient temperature.
The TFM rating shall denote the period of time which the firestop:
• Met all the criteria of the F rating;
• Limited the transmission of heat through the assembly as measured by an individual thermocouple placed on the unexposed
side of the fire stop material positioned 1 in. (25 mm) from the penetrating item from exceeding a 325°F (181°C) rise above ambient
temperature.
FM Approvals does not consider the performance of the thermocouples placed directly on the penetrating item for purposes of
determining the TFM rating as it is not viewed as part of the firestopping materials provided in trying to protect the opening.
All joint systems between adjacent floor, wall or top of wall sections shall be subjected to a fire resistance and hose stream test
conducted in accordance with ASTM E1966, “Standard Test method for Fire Resistance Joint Systems”. If successful, the assembly
will be assigned an Assembly Rating based on the time period in which it has successfully met the performance criteria. Floor-to-floor
and floor-to-wall joint systems shall also be subjected to the same fire test but are not required to be subjected to a hose stream test.
All joint systems shall be subjected to a cycling test conducted in accordance with ASTM E1966 prior to the fire resistance and hose
stream test. Three (3) movement ratings are available – Type 1, Type 2 and Type 3.
Fire Stop Design 641
F Rating – 3 HR
T Rating – 1-½ HR (see item 3)
TFM Rating – 3 HR (see item 3)
- WALL ASSEMBLY. One or two hour fire rated gypsum wall assembly constructed with steel channel studs.
a. Steel studs are channel shaped, min 3-5/8 in. (92 mm) deep and 1-5/8 in. (41 mm) wide with ½ in. (13 mm) folded back
flanges. Fabricated from 20 MSG galvanized steel, spaced a max of 16 in. (400 mm) on center. Additional framing members
are to be installed to form a rectangular box having dimensions which are a max ¼ in. (6 mm) greater than the width and
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| height of the firestop device frame (Item 3A), excluding mounting flanges. Max area of framed opening is 90 in2 (580 cm2) | |
| [R-200 Device]. Max dimension of the opening is 9-1/2 in. wide x 9-1/2 in. high (240 mm x 240 mm) [R-200 Device]. |
b. Gypsum Board. Min three (3) layers of ½ in. (13 mm) thick Type C gypsum wallboard.
c. Mineral Wool. Mineral wool batts or blankets shall completely fill the stud cavity.
- CABLES. Aggregate cross-sectional area of the cables in each device shall be from 0 to 100% fill. Cables shall be rigidly
supported on both sides of the wall assembly.
Max 3/C No. 500 kcmil MC type copper conductor power cable with ethylene propylene rubber (EPR) insulation and PVC jacket
material.
- FIRESTOP SYSTEM. The firestop system shall consist of the following:
a. Firestop Devices – Circular firestop device for use in preformed openings. The firestop device shall be inserted into the
framed opening and friction fit on one side of the wall assembly. Each device consists of a single/multi-diameter elastomeric
sealing module and a steel compression plate. The square openings of each device frame shall be filled with a single
elastomeric sealing module with a max of one (1) cable per sealing module. The steel flange of each firestop device shall be
secured to the steel stud framing of the wall assembly through the gypsum wallboard layer by means of No. 8 x 3 in. (75 mm)
long self-drilling, self-tapping steel screws through the predrilled holes in the device frame mounting flange The sheets of the
multi-diameter sealing module halves are removed one by one until a max gap of 0.04 in. (1 mm) is formed between the two
modules halves. After installation of the modules into the device, the bolts of the compression unit are tightened to form an
effective seal around the cables. The device shall be installed in accordance with the manufacturer’s written installation instructions.
b. Silicone RTV Sealant (not shown) – A min ¼ in. (6 mm) diameter bead of silicone RTV sealant shall be applied as a gasket
between the device frame mounting flange and the gypsum wallboard. The sealant bead shall be located between the edge
of the opening and the line of fasteners around the entire perimeter of the framed opening.
c. Packing Material – Pieces of minimum 3 in. (75 mm) thick, min 2.8 lbs/ft3 (45 kg/m 3) density mineral wool batt insulation cut to
line the four (4) sides of the through opening within the wall cavity. Pieces are cut to length and tightly friction fit between the
framing of the wall opening and cables and in-between cables flush with the wall surface.
3a.
Frame,Sealing Modules
Frames
Types R-70; R-75; R-100; R-125; R-127; R-150 and R-200 and their corresponding flanges SLFR70; SLFR75; SLFR100;
SLFR125; SLFR127; SLFR150 and SLFR200.
Types R-70 EMC; R-75 EMC; R-100 EMC; R-125 EMC; R-127 EMC; R-150 EMC and R-200 EMC and their corresponding
flanges SLFR70; SLFR75; SLFR100; SLFR125; SLFR127; SLFR150 and SLFR200
Sealing Modules
RM, RM ES, RM PE, RM ES B or RM PE B Sealing Modules
*When RM ES B or RM PE B sealing modules are used, the T and T FM ratings are 0 Hr.
Company Name: Roxtec International AB
Company Address: Box 540, SE-371 23 Karlskrona, Sweden
Company Website: http://roxtec.com
New/Updated Product Listing: No
Product Type: Misc Firestopping Devices
Listing Country: Sweden
Certification Type: FM Approved
Class of Work: 4990-Penetration Seal & Fire Stop
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