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SUPPLEMENTARY
MULTIFLEX FIRE BARRIER
90° CORNER SPLICE
INSTALLATION INSTRUCTIONS
IMPORTANT:
READ THROUGH ALL INSTRUCTIONS PRIOR TO STARTING INSTALLATION
Prior to the commencement of Installation all materials MUST be
inspected for Damage. Any damage must be reported to Construction
Specialties as soon as possible, so that replacement materials may be
furnished without delay.
All work must be completed as per Architect's Approved "Shop
Drawings", and in accordance with these Installation Instructions. When
installation is complete, all materials must be protected from damage
until the Architect's FINAL INSPECTION.
IMPORTANT
INFORMATION
All materials should be arranged in the order that they are
to be installed. All hardware required for each portion of
the work should be placed with the appropriate materials.
Please review all Approved Shop Drawings and this
Document to familiarize yourself with all the details and
components of this assembly.
10/9/14
12ET
This document is the property of Construction Specialties, Inc. and contains
CONFIDENTIAL PROPRIETARY INFORMATION that is not to be disclosed to
third parties and is not to be used without approval in writing from
Construction Specialties, Inc.
General Instructions:
* Fire Barriers must be installed in accordance with installation instructions to maintain UL Rating.
* These instructions are for all horizontal Multiflex and Monoflex installations. For 7"-20" nominal joint widths galvanized
flanges are welded to the fire barriers as shown on the following pages. For 1"-6" nominal joint widths galvanized
flanges are not attached, follow instructions and notch flanges as required. Galvanized flanges are always required for
installation.
* The 7"-12" nominal joint width barriers are a single draped system.
* The 13"-20" nominal joint width barriers are a double draped system as shown.
* Typically, the same fasteners can be used to fasten the cover plate mechanism and the fire barriers.
* See separate installation instructions for straight runs of fire barrier.
* Wear heavy duty work gloves and eye protection during the entire installation process.
Packaging:
One kit with the necessary material for splicing.
Material Preparation:
Set the product out face up (the side with the UL label) and cut to length.
GENERAL NOTES
CRIMP AT CENTER
OF INSULATION
TO HELP FACILITATE
INSTALLATION
Fig. A - 90° Corner Splice
Material Preparation
GALVANIZED
FLANGE
ATTACHED
PAGE 2
INTER-LEAFING CUTS
SPLICE PINS
90° CORNER SPLICING INSTRUCTIONS
The following instructions are to be used to splice together two pieces of expansion joint fire blankets creating a 90° corner. It is
recommended that this procedure be performed prior to installation on a flat surface. After the splicing of the 90° corner is completed,
the installation procedure remains the same as described in the model size fire barrier type installation instructions.
Note: Fire Barriers must be spliced in accordance with splicing instructions to maintain UL Rating.
Fig. 1
Fig. B
JOINT WIDTH SPLICE ZONE
PAGE 3
*THIS SIDE OF THE FIRE BARRIER /
GALVANIZED FLANGES FORMS
THE 90° INSIDE CORNER TRANSITION
TOP VIEW OF GALVANIZED
FLANGES TO BE SPLICED
JOINT WIDTH SPLICE ZONE
* THIS SIDE OF THE FIRE BARRIER /
GALVANIZED FLAGES FORMS
THE 90° OUTSIDE CORNER TRANSITION
NOTCH OUTSIDE CORNER
FLANGE 1
1
4
" IN FROM
SPLICE FACE
STEP 1
Lay each blanket segment on a flat surface. Measure and mark the joint width distance on the inside 90° corner of the galvanized
flange of each blanket to be spliced. This will be the splice zone. Remove only the tie pins within the splice zone of each blanket
segment (See Figs. 1,2,& B).
90° CORNER SPLICING INSTRUCTIONS
STEP 2
On the opposite side of the fire barrier at the galvanized flange blanket portion (surface mount or low profile flanges) measure and
mark 1
1
4
" in from the end on the blanket portion of the flange only. If fire barrier flange is a low profile flange (* As seen in Fig. 3 below)
measure and mark 3/4" in on the anchor portion of the galvanized flange a "V" CUT. Cut out only these marked locations on the
flange.
Fig. 2
Fig. 3
MEASURE 1
1
4
" ON BLANKET PORTION
OF GALVANIZED FLANGE
PAGE 4
THIS SIDE OF THE FIRE BARRIER /
GALVANIZED FLANGE FORMS
THE 90° OUTSIDE CORNER TRANSITION
BLANKET PORTION
GALVANIZED
FLANGE
ANCHOR PORTION
GALVANIZED
FLANGE
MEASURE 3/4" ON ANCHOR
PORTION OF GALVANIZED
FLANGE
90° CORNER SPLICING INSTRUCTIONS
STEP 3
Cut off the pre-welded flanges in the joint width splice zones of the inside 90° corner (See Fig. 4). At the outside 90° corner, trim off
the 1
1
4
" of the blanket portion flange and
3
4
" of the anchor portion of the low profile flange (See Fig. 5 below).
Fig. 4
Fig. 5
PAGE 5
90° CORNER SPLICING INSTRUCTIONS
STEP 4
At the splice zone areas, inside 90° corner, cut back the top screen and foil areas. Carefully fold back the top screen and foil layer
exposing the fire barrier insulation layers. (See Fig. 6 & 7) Note: Monoflex (OFX) fire barrier does not have a top or bottom screen
layer.
Fig. 6
Fig. 7
PAGE 6
90° CORNER SPLICING INSTRUCTIONS
STEP 5
Make a cardboard concave and convex template to create the splicing arch of the insulation fire barrier layers. The template will equal
the joint width plus 4". The template width is the fire barrier blanket width. The convex or concave arch is 2 1/2" from the diagonal line.
Mark on template the outside corners.
Fig. 8
Section of Splice Zone
Fig. 9
METALLIC SEPTUN LAYERS
BETWEEN INSLUATION
LAYERS
TOP SCREEN AND FOIL
PAGE 7
SPLICE ZONE
DISTANCE =
JOINT WIDTH
SPLICE ZONE
DISTANCE =
JOINT WIDTH
CL
TEMPLATE
WIDTH =
FB BLANKET
WIDTH
DRAW DIAGONAL
LINE BETWEEN
CL CL
2 1/2" DISTANCE
STEP 6
Using the cardboard templates to make convex and concave type archs, alternating at each insulation blanket layer, cutting away the
layer of insulation in the splice zone of each blanket segment. Be careful not to cut away the metallic septum layer (foil layers between
blanket layers) in cutting the insulation (See Figs. 8 - 13). Fold the septum (foil) layer back before cutting the next fire barrier insulation
layer. Make the opposite cuts on the other half of the splicing fire barrier.
T
R
IM
A
W
A
Y
CARDBOARD TEMPLATE
INSULATION BLANKET AREA
TO BE TRIMMED AWAY
2" 2"
OUTSIDE
CORNER
OUTSIDE
CORNER
90° CORNER SPLICING INSTRUCTIONS
ALTERNATE CUTTING A CONVEX
TO A CONCAVE CURVE FROM THE
INSULATION BLANKET LAYERS
PAGE 8
FOLD BACK EACH SEPTUM (FOIL)
LAYER PRIOR TO CUTTING THE
NEXT INSULATION BLANKET
LAYER
Fig. 10
Fig. 11
Fig. 12
Fig. 13
90° CORNER SPLICING INSTRUCTIONS
STEP 7
Overlap the bottom foils bringing together the two blanket segments and flanges, then interweaving the septum (foil) and insulation
layers (See Figs. 14 - 16). The splice should not have any gaps. Overlap the top two screens . Install two pins joint sizes 10" and
smaller, three pins for joint sizes larger than 10". Install pins from the bottom of the slpice zone, through all foil and insulation layers
and both of the outer screen layers (See Fig 17). *Note: Monoflex (OFX) Fire Barrier does not have a top or bottom screen layer.
Fig. 14
INSULATION BLANKET
LAYERS
Fig. 16
SPLICE ZONE
WIDTH
BOTTOM SCREEN
AND FOIL
PAGE 9
Fig. 15
MATCH UP INSULATION LAYERS
FROM THE TWO FIRE BARRIER
SEGMENTS THEN THE SEPTUM
(FOIL) LAYERS CREATING A
45° ANGLE
90° CORNER SPLICING INSTRUCTIONS
STEP 8
Note: Pinned together laying flat the fire barrier will not be at a 90° angle (See Fig. 18).
To install 90° corner splice into the joint cavity, fold fire barrier along the center line of the blanket bending into a "U" shape being
careful not pull apart the splice area (See Fig. 19). Drill the appropriate size holes and secure the flanges with fasteners with a
maximum spacing of 18 inches (Reference fire barrier installation instructions for mounting Surface Mount and Low Profile Flanges).
Fig. 17
Fig. 18
SPLICE PINS
TOP VIEW OF SPLICE
PAGE 10
PAGE 11
90° CORNER SPLICING INSTRUCTIONS
STEP 9
To install the galvanized trim piece at the inside 90° corner (See Fig. 19) notch a 45° angle cut on the 12" long galvanized flange drop
piece, 1
1
2
" each side of center on the top of the flange only.
Bend trim piece at the center creating a 90°angle and install at the inside corner of the fire barrier. Attach trim miter through the top of
the attachment angle of the fire barrier using four fasteners.
Fig. 19
GALVANIZED FLANGE
NOTCHED AT CENTER
TO CREATE A 90°
MITERED CAP PIECE
45°
1
1
2
"
12"