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Hilti Firestop Systems
Wall Opening Protective Materials (CLIV, CLIV7)
CP617 / CFS-P PA / FIRESTOP BOX INSERT
HILTI Firestop Box Insert, for use with max 2 1/8 x 4 x 2 1/8 in. deep UL Listed Metallic Outlet Boxes without internal clamps in 2 hr fire rated
gypsum wallboard wall assemblies framed with min 3 1/2 in. deep wood or steel studs and constructed of materials and in the manner
specified in the individual U300, U400 or V400 Series Wall and Partition Designs in the Fire Resistance Directory. Outlet boxes may be
installed with steel cover plates. One 1-7/8 x 2-13/16 insert adhered to the interior back wall of the outlet box in accordance with the
instructions supplied with the product.
HILTI Firestop Box Insert, for use with max 4-1/2 x 8-1/2 in. by 1-5/8 in. deep or max 3-3/4 x 5-1/2 in. by 2-1/2 in deep UL Listed Metallic Outlet
Boxes without internal clamps in 1 hr or 2 hr fire rated gypsum wallboard wall assemblies framed with min 3 1/2 in. deep steel or wood studs
and constructed of materials and in the manner specified in the individual U400, V400 or U300 Series Wall and Partition Designs in the Fire
Resistance Directory, as summarized in the Table below. Outlet boxes installed with steel cover plates. Box inserts evenly spaced and
adhered to the interior back wall of the outlet box in accordance with the instructions supplied with the product.
Box
Size
Type of Box
and Cover Plate
Hourly
Rating
Wall
Type
4 x 4 x 2-1/8 in deep
Metallic w/ steel cover plates
2-hour
U300, U400 or V400 - wood or steel studs
4 x 4 x 2-1/8 in deep
Metallic w/ plastic cover plates
1-hour
U300, U400 or V400 - wood or steel studs
4 x 4 x 1-1/2 in deep
Metallic w/ plastic cover plates
1-hour
U300 - wood studs
Box Size
Inserts Used
Fire Rating
Wall Type
4-1/2 x 8-1/2 x 1-5/8 in deep
Two 3-11/16 x 3-3/4 in. inserts **
2 hour
U300, U400 or V400 - wood or steel studs
3-3/4 x 5-1/2 x 2-1/2 in deep
One 3-11/16 x 3-3/4 in. insert and one 1-7/8
x 2-13/16 in. insert
1 hour
U300, U400, or V400 - wood or steel studs
** - Min 3/4 in. deep plaster rings installed over outlet box. After installation of gypsum board, nom 1/4 in. thickness of Hilti FS-ONE
Sealant or FS-ONE MAX Intumescent Sealant, bearing the UL Classification Marking for Fill, Void or Cavity Materials, applied between
the base layer of wallboard and the plaster ring.
HILTI Firestop Box Insert , for use with 4-3/8 by 4-7/8 by 2-1/4 in. deep flush device UL Listed Metallic Outlet Boxes without internal clamps in 1
hr fire rated gypsum board wall assemblies framed with min 3-1/2 in. deep wood or steel studs and constructed of the materials and in the
manner specified in the individual U300, U400 or V400 Series Wall and Partition Designs in the Fire Resistance Directory. One 4-3/8 in. wide
by 4-3/8 in. high insert adhered to the interior back wall of the outlet box in accordance with the installation instructions supplied with the
product. Smaller sized inserts may be cut and combined to achieve the 4-3/8 in. by 4-3/8 in. coverage and adhered to the interior back wall of
the outlet box. Outlet boxes installed with plastic or steel cover plates.
HILTI Firestop Box Insert, for use with 4-3/8 by 4-7/8 by 2-1/4 in. deep flush device UL Listed Metallic Outlet Boxes without internal clamps in 2
hr fire rated gypsum board wall assemblies framed with min 3-1/2 in. deep wood or steel studs and constructed of the materials and in the
manner specified in the individual U300, U400 or V400 Series Wall and Partition Designs in the Fire Resistance Directory. One 4-3/8 in. wide
by 4-3/8 in. high insert adhered to the interior back wall of the outlet box in accordance with the installation instructions supplied with the
product. Smaller sized inserts may be cut and combined to achieve the 4-3/8 in. by 4-3/8 in. coverage and adhered to the interior back wall of
the outlet box. Outlet boxes installed with steel cover plates.
CP 617(-L, -XL) or CFS-P PA Firestop Putty Pads and HILTI Firestop Box Inserts, for use with maximum 4 by 4 by 1-1/2 in. (102 by 102 by 38
mm) deep flush device UL Listed Metallic Outlet Boxes installed with steel mud rings and with steel or plastic faceplates in 1 or 2 hr fire rated
gypsum board wall assemblies constructed with min 3-1/2 in. (89 mm) wide wood or steel studs. When both protective materials are used with
outlet boxes on both sides of the wall as directed, the boxes may be installed back-to-back provided that the backs of the boxes are minimum
1/2 in. (13 mm) apart and provided that the boxes are not interconnected. Adjoining pieces of moldable putty pads to be overlapped approx 1/2
in. (13 mm) at the seam. An insert pad shall be installed to completely cover the back inside surface of each outlet box.
Reproduced by HILTI, Inc. Courtesy of
Underwriters Laboratories, Inc.
January 30, 2019
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