Page text

Hilti Firestop Systems
Page: 2 of 3
3. Firestop System — The firestop system shall consist of the following:
A. Packing or Forming Materials — Min 2 in. (51 mm) thickness of min 4 pcf (64 kg/m3) mineral wool batt insulation tightly packed into the
opening as a permanent form. Packing material to be recessed from the bottom surface of floor or both surfaces of wall to accommodate the
required thickness of sealant (Item 3B).
B. Fill, Void or Cavity Material* — Min 1/2 in. (13 mm) thickness of sealant applied within the annulus, flush with bottom surface of floor or with
both surfaces of wall. In systems with sleeves (Item 1A), for L Rating, a bead of sealant shall be applied at sleeve to concrete interface at top
or bottom side of floor or both sides of wall.
HILTI CONSTRUCTION CHEMICALS, DIV OF HILTI INC — FS-ONE MAX Intumescent Sealant
C1. Fill, Void or Cavity Material* — For nonmetallic pipes 12" or smaller. Wrap Strip - Two stacks of six layers of intumescent wrap strip are
continuously wrapped around the pipe with ends held in place with masking or aluminum tape. Butted ends in successive layers shall be
offset. Wrap strip butted tightly against bottom surface of floor or both surfaces of wall.
C2. Fill, Void or Cavity Material* — For nonmetallic pipes greater than 12". Wrap Strip - Two stacks of eight layers of intumescent wrap strip are
continuously wrapped around the pipe with ends held in place with masking or aluminum tape. Butted ends in successive layers shall be
offset. Wrap strip butted tightly against bottom surface of floor or both surfaces of wall.
HILTI CONSTRUCTION CHEMICALS, DIV OF HILTI INC — CP648-E W45/1-3/4" Firestop Wrap Strip
D. Fill, Void or Cavity Material* — Wrap Strip - Four layers of intumescent wrap strip are continuously wrapped around the pipe with ends held in
place with masking or aluminum tape. Butted ends in successive layers shall be offset. Wrap strip butted tightly against double stack of wrap
strip (Item 3C) at bottom surface of floor or both surfaces of wall.
HILTI CONSTRUCTION CHEMICALS, DIV OF HILTI INC — CP648-E W25/1" Firestop Wrap Strip
E. Firestop Device* — Z-frame (four pieces) cut to a length equal to the OD of the double stack wrap strip and installed in point contact with the
wrap strip (Item 3C) at the four sides to form a 5 in. (127 mm) deep rectangular enclosure around the wrap strip material . The 2 in. leg of each
piece of Z-frame fastened to the floor or wall through each of the round 3/8 in. (9.5 mm) diam pre-made holes in outer edge of Z-frame with
3/16 in. (4.8 mm) by 1-1/4 in. (32 mm) long steel concrete screw anchors in conjunction with 1 in. (25 mm) diam fender washers. The four
pieces of Z-frame are butted at the four corners. Z-frame enclosure installed at bottom of floor or both sides of wall.
HILTI CONSTRUCTION CHEMICALS, DIV OF HILTI INC — CP 675T Z-Frame
F1. Attachment Clip* — (Not shown) At each corner of the Z frame enclosure the butting pieces of Z-frame shall be secured with one CP 643N
attachment clip centered at mid-depth of Z-frame. Each leg of clip is attached to the Z-frame with a min 3/4 in. long steel screw and 3/4 in.
diam. steel washer.
HILTI CONSTRUCTION CHEMICALS, DIV OF HILTI INC — CP 643N attachment clips
CAJ2836
Reproduced by HILTI, Inc. Courtesy of
Underwriters Laboratories, Inc.
February 14, 2019
CANADA ONLY
System No. C-AJ-2836
Pipe Type
Nom Pipe Diam.,
In. (mm)
F-Rating,
Hr.
FT-Rating,
Hr.
FH-Rating,
Hr.
FTH-Rating,
Hr.
Pressure
Differential, Pa
PVC, XFR-PVC
Greater than 12
2
2
0
0
50
PVC, XFR-PVC
12 or smaller
3
2-3/4
3
2-3/4
50
CPVC
12 or smaller
3
1-1/2
0
0
2.5
CPVC
Greater than 12
2
1-1/2
0
0
2.5
Nom Pipe Diam.,
In. (mm)
Required number of
wrap strips (Item 3C)
Required number of
attachment clips (Item 3F)
12 or smaller
3C1
3F1
Greater than 12
3C2
3F2