FM APPROVALS
Project ID: 3041526
Appendix E
FIRE STOP DESIGN 639
F Rating – 1 and 2 HR (see item 1)
T Rating – 0 and ¾ HR (see item 1 and 3)
TFM Rating – 0 and ¾ HR (see item 1 and 3)
| 1. | WALL ASSEMBLY. One or two hour fire rated gypsum wall assembly constructed with steel channel |
|---|---|
| studs. |
A. Steel studs (not shown) 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
height of the firestop device frame (Item 3A), excluding mounting flanges. Max area of framed
opening is 50 in2 (323 cm2) [R-150 Device]. Max dimension of the opening is 7 in. wide x 7 in.
high (178 mm x 178 mm) [R-150 Device].
B. Gypsum Board. Min 5/8 in. (16 mm) thick x 4 ft (1.2 m) wide gypsum wallboard applied to
each side of the wall. The gypsum wallboard type, thickness, number of layers, fastener type and
sheet orientation shall be as specified in the individual wall assembly hourly rating design criteria
however 1 hour walls shall use at least 1 layer of Type X gypsum board and 2 hour walls shall use
at least 2 layers of ½ in (13 mm) thick type C gypsum board.
C. Mineral Wool. Mineral wool batts or blankets shall completely fill the stud cavity.
The hourly F rating is 1 and 2 hr for 1 and 2 hr rated assemblies, respectively.
The hourly T and TFM ratings are 0 hr and ¾ hr for 1 and 2 hr rated assemblies,
respectively, unless shown otherwise below.
Page 24 of 36
FM APPROVALS
Project ID: 3041526
| 2. | 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.
| 3. | FIRESTOP SYSTEM. The firestop system shall consist of the following: |
|---|
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
Roxtec International AB, Rombvagen 2 – Verke Industriale
Karistrona, Sweden SE-37123
Frame and Sealing Module Unit
Types RS-23; RS-25; RS-31; RS-43; RS-50; RS-68; RS-75; RS-100; RS-125 and RS-150 and
their corresponding flanges SLFR23; SLFR25; SLFR31; SLFR43; SLFR50; SLFR68; SLFR75;
SLFR100; SLFR125 and SLFR150.
Types RS ES-23; RS ES-25; RS ES-31; RS ES-43; RS ES-50; RS ES-68; RS ES-75; RS ES-100;
RS ES-125 and RS ES-150 and their corresponding flanges SLFRS23; SLFRS25; SLFRS31;
SLFRS43; SLFRS50; SLFRS68; SLFRS75; SLFRS100; SLFRS125 and SLFRS150.
Types RS PE-23; RS PE-25; RS PE-31; RS PE-43; RS PE-50; RS PE-68; RS PE-75; RS PE-100;
RS PE-125 and RS PE-150 and their corresponding flanges SLFRS23; SLFRS25; SLFRS31;
SLFRS43; SLFRS50; SLFRS68; SLFRS75; SLFRS100; SLFRS125 and SLFRS150.
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/m3) 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.