MetalWorks Concealed
CEILING
SYSTEMS
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MetalWORKS Concealed
™
I n s ta l l a ti on I nst ruc t i ons
1 . GE N E RAL
1 .2 S urf ac e F inis h
1 . 1 Pr o d u c t D e sc ri p t i o n
All panels are constructed of and have a factory-applied
powder-coated, post-production finish.
MetalWorks Concealed ceilings consist of perforated and
unperforated panels that are downward accessible, and
are designed to be installed on a conventional Armstrong
Prelude® 15/16" wide T-Bar suspension system with T-Bar
hooks attached to panels. All panels can be removed and
reinstalled for access to the plenum. Panels are supported
from the suspension system by metal hooks that are
screw-attached through pre-drilled holes.
Available panel sizes are 24" x 96", 24" x 120", 48" x 48",
48" x 96", and 48" x 120". Panels, hooks, and screws are
sold separately.
For floating or non-continuous installations, MetalWorks
Concealed 6" Trim is available.
1 . 1 . 1 M a t e r i a l D e l i v e ry
Panels are bulk packaged for each job.
• Natural
• T-Bar Hooks (item 5986) are packaged 50 pieces per
carton.
– 4 hooks are required for each 24" x 96",
48" x 48", and 48" x 96" panel
– 6 hooks are required for each 24" x 120" and
48" x 120" panel
• Metal Screws (item 90190A242) are packaged 100
pieces per carton. Three screws are required for
each hook.
• 12' Support Hangers (item SH12) are packaged 12
pieces per carton.
• Nominal 6" x 120" MetalWorks Concealed Trim (item
6656M1) is packaged 6 pieces per carton.
• T-Bar Connector Clips (item FXTBC) are packaged
10 pieces per carton.
• Splice Plates (FX4SPLICE) are packaged 10 pieces
per carton.
• Safety Cables (item 6091) are packaged 50 pieces per
carton.
1 .3 . S t o rage and Handling
Ceiling panels shall be stored in a dry interior location and
shall remain in cartons prior to installation to avoid damage.
The cartons shall be stored in a vertical position. Proper care
should be taken when handling to avoid damage or soiling.
NOTE: MetalWorks Concealed panels may be packaged with
the face of the panel toward the outside of the carton.
Exercise care in moving and opening cartons to prevent
damage to the panel face.
1 .4 S it e Co ndit io ns
Areas to receive ceilings shall be free of construction dust
and debris. Panels should only be installed in closed and
acclimatized buildings. Interior systems cannot be used in
exterior applications where standing water is present or
where moisture will come in direct contact with the ceiling.
1 .4 .1 HV AC De s ign & Ope rat io n
Proper design for both supply air and return air, maintenance
of the HVAC filters and building interior space are essential
to minimize soiling. Before starting the HVAC system, make
sure supply air is properly filtered and the building interior is
free of construction dust.
1 .4 .2 Ins t allat io n Co ns ide rat io ns
MetalWorks Concealed panels hang below the suspension
system to which they are attached. The face of the installed
panels will be 2-7/8" below the face of the suspension
system from which they are supported. The plenum may be
visible through the 1/4" panel reveal.
Not recommended for sloped ceiling installations.
2. S
US P E N SION SY S T EM for Wall - to-W all
Installation
The 2" leg molding will provide a reveal of 1-5/8" between panel
edge and wall. The reveal with a 7/8" molding will be 1/2".
2. 1 Gen e r a l
Attach the desired molding to the walls 2-7/8" above the finish
ceiling height.
The suspension system shall be heavy-duty 15/16" exposed
tee suspension system. The installation shall, in all cases,
conform to the requirements of the International Building Code
and its referenced standards.
The requirements listed here represent the manufacturer’s
minimum acceptable installation recommendations, and may
be subject to additional requirements established by the local
authority having jurisdiction.
2. 2 Su s p e n s i o n S y s te m I n st a l l at i o n
The suspension system for this system does not line up with
the panel edges. Main beams are located 1' in from the short
sides of the panels and then at 2' centers. Cross tees are
placed directly over the edges of the long sides of the panels.
Follow these instructions carefully to complete the installation
of the suspension system.
2 .2 .2 S uppo rt Hange r
SH12 Support Hanger can be used to reduce the number of
hanger wire attachments to main beams. If the support hanger
is not used, hanger wires will be required on main beams
every 4' along the main beam. Where sections of support
hanger must be joined together, overlap one notch and secure
with framing screws inserted through the holes provided.
2 .2 .3 Main Be ams
Typical placement of the main beams is 1' in from the factory
end of the panels and then at 2' centers. Up to 10" may be
cut from the end of a panel before the suspension system
location at the cut end must be altered. When more than 10"
must be removed, install a main beam 1' closer to the center
of the panel. Open the mouth of the support hanger notches
where main beams must be installed by bending with a pair of
pliers. Cut the first main beam in each row to provide a cross
tee route hole at the long edge of the first row of panels. Insert
the main beams into the support hanger notches and close
the mouth by bending the tab back under the bulb of the
main beam. Work carefully to ensure that each tab is properly
seated under the bulb of the main beam.
24.000
11.875
24.000
Main Beam
2. 2. 1 Wa l l M o l d i n g
The International Building Code requires a molding with a
minimum 2" horizontal leg. However, where our ESR1308
report is accepted, a 7/8" leg may be substituted when used
along with our BERC2 clip.
4" min
2 .2 .4 Cro s s T e e s
Install 2' cross tees above the long edges of the panels to
complete the suspension system installation. Swing the
support hanger out of the way to provide clearance for the
end details on the cross tees. Install all of the cross tees in a
row and then secure the support hanger by inserting a framing
screw through the hole provided and into the bulb near each
end of each cross tee.
Slide
Clip 3/8"
NOTE: When BERC2 is used, the clips adjacent to the molding
must be relocated 3/8" toward the center of the panel. Draw
lines through the factory-drilled pilot holes across the back of
the panel. Shift the outer clips 3/8" toward the center of the
panel and secure each with three screws.
NOTE: Perimeter wires must be attached to the terminal ends
of each piece of suspension system at least 4" but not greater
than 8" from the wall. These wires must be plumb within 1 in 6
(10° angle).
2 .2 .5 P e rime t e r At t ac hme nt
Secure the ends of the suspension system at two adjacent
walls by attaching to the wall molding flange. Screws or pop
rivets may be used for this connection. Use stabilizer bars or
BERC2 clips to prevent the suspension system from spreading
at the opposite ends.
2
2. 2 . 6 C o mp l e te S e i s m i c I n st a l l at i o n R e q u i re m e nt s
Install perimeter wires and lateral force bracing. Check to
ensure that all code based installation requirements have
been met.
3. 0 P anel Installation
3. 1 C u tti n g t h e P a n e l s
Cut panels should never occur within the field of the ceiling.
All ceiling mounted services must either replace a full panel,
install into a hole that is cut into a panel, or be mounted
through the face of a panel.
3 .1 .6 Cut t ing t he S ho rt Edge
Up to 10" may be cut from the narrow end of a panel without
moving clip locations. When more than 10" must be removed,
begin by carefully measuring back 12" from the factory holes
toward the center of the panel and draw lines across the
back of the panel. Cut the panel and attach the hooks to
the factory holes and on the lines. Be careful to maintain the
correct position along the lines. Measure the factory holes for
uncut edges and follow the procedure in section 3.2.2 where
the long edge has also been cut. Each clip must have three
screws installed. NOTE: Pre-drill holes prior to installation.
3.1.1 See MetalWorks™ Cutting Instructions LA-295518 for
detailed information about cutting Armstrong metal ceilings.
This document discusses the advantages and disadvantages
of several types of equipment and how they are used when
cutting our products.
3.1.2 When BioAcoustic™ (item 5823) or fiberglass (item
8200100) infill is used, it also must be cut to size. This is best
done with a large pair of shears or scissors. Reseal the poly
bag with packing tape prior to installation.
3. 1 . 3 S ta r ti n g Ro w
Check the orientation of the hooks when attached to the
pre-drilled holes on the back of the panel. The starting row
must be installed such that the open side of the hooks will
be facing the wall. Cut the panel as required considering the
reveal dimensions listed in section 2.2.1.
3. 1 . 4 Re l o c a t i n g H o o k s
If cutting the panel will remove any of the hook attachment
holes, these should be relocated prior to cutting.
12"
10-22"
0-10"
Scrap
3 .1 .7 At t ac h Clips
Attach a T-Bar Hook (item 5986) at each set of factory-drilled
pilot holes on each panel. Three screws (item 90190A242) are
required in each clip.
3. 1 . 5 C u tti n g t h e L o n g Ed g e
When the long edge of the panel is to be cut, first use a
straight edge to draw lines across the back of the panel
through the factory holes. Cut the panel to size. Attach a
T-Bar Hook (item 5986) to each set of factory-drilled holes;
three screws (item 90190A242) are required in each clip.
Measure the suspension system opening and place clips on
the reference lines so that the dimension from the outer edge
of the factory-located clip to the outer edge of the relocated
clip matches the suspension system opening dimension. Drill
pilot holes at the new screw locations. Use a stop on the drill
to prevent penetrating through the panel. Attach the relocated
clips with three screws in each.
Cut
Line
X
Scrap
Scrap
3
3. 1. 8 T r e a t i n g E x p o s e d E d g e s
If there is a desire to conceal the cut edge of these panels,
then a Slip-on Molding (Item 7842A) can be installed. The
slip-on molding needs to be cut to size to fit the cut side
of the panel. If a panel has two sides that are cut, then the
moldings can be mitered at the corner if desired. Relief cuts
may also need to be made in the top flange of the slip-on
molding as to not interfere with the T-Bar Hooks that are
attached to the backside of the panel.
3 .2 .3 Middle Ro ws
Apply hooks to the remaining full-size panels and install in the
same direction as the first row.
3 .2 .4 L as t Ro w
Panels in the last row are reversed so that they install with the
open side of the hooks facing the ending wall. Prepare the
panels as detailed in section 3.0. Raise the factory end of the
panel up and over the end of the one in the next to last row
to allow the hooks to clear the suspension system. Shift the
panel up and toward the wall to engage the hooks onto the
main beams.
Caution: Cut panel edges may be sharp! Cut panel edges
that are exposed to view should use perimeter trim so the
interior construction of the panel can’t be seen. For finishing
edges on floating or non-continuous installations, see
section 5 in these instructions.
3. 2 Ins t a l l th e Pa n e l s
3. 2. 1 Fi r s t Ro w
First row panels are installed with the open side of the clips
facing the wall. Raise the hooks above the level of the suspension
system and move the panel toward the wall. Lower the clips
onto the bulbs of the main beams. The clips will fit between
the cross tees and center the panels under the grid opening.
4
4. P anel R emoval
Panels are easily removed by lifting to disengage the hooks
from the main beams. Lift and shift in the long direction of
the panel. Border panels will always move away from the
wall. Panels in the center of the installation will only move in
one direction. Once the hooks have cleared the suspension
system, lower the free end of the panel until the hooks near
the upper end can clear the suspension system.
Main Beam
5. F L OAT IN G IN ST A L L A T I O N W I T H M E T A L W O R KS ™
C ON C E ALE D T RIM
A minimum 2-panel long installation is recommended for
floating installations with MetalWorks Concealed Trim
(item 6656M1). For installations with cut panels, please follow
tips in section 3.1, 3.1.1, 3.1.5, and 3.1.6.
Outline of
Ceiling Cloud
Main Beam
5. 1 Pr e - As s emb l y
SH12
Review the location of the SH12 carrying channels. They will
be located 2' from the longest side of the cloud and then 4'
on center (note that in some instances, this pattern will result
in two SH12 carrying channels being positioned 2' from one
another at the center of the cloud). Cut and splice SH12
together (if needed) to match the length of the cloud.
Outline of
Ceiling Cloud
SH12
5 .3 Ins t all Cro s s T e e s
5. 2 In s t a l l M a i n B e a m s
The main beams for a MetalWorks Concealed floating
installation should be cut to the nominal width of the cloud.
Install 2' cross tees between main beams. After all cross tees
have been installed, slide the SH12 Hanging Channel along
the main beams so that it rests against the cross tees. Screw
the support channel to the cross tees by inserting a #8 x 9/16"
sharp point sheet metal screw into the holes on each side of
the main beam as shown in the drawing below. Bend the tabs
at the ends of the SH12 support channel as shown so that
they will fit under the bottom of the bulb of the cross tees and
secure with a #8 x 9/16" screw. Cut 1' cross tees and insert
into outside main beams to match 2' cross tees. Secure with
screws.
For example, for a nominal 8' wide cloud, cut the main beams
to 8' or 96". These cuts should be made through a route at
both ends of the main beam. This will help to keep the right
spacing for the cross tees in the system.
Install main beams into the appropriate notches on the SH12
Hanging Channels. The first main beam will be 1' from the
end of the channel and the remainder will be placed at 2'
centers. Slide the main beam through the notches or bend
the tab on one side of the notch out of the way so that the
main beam can be installed from below. Bend the tab back
into position under the bulb of the main beam.
2 Ft. Cross Tee
5
Mitered on
Both Ends
47-1/16"
Finished
6'
Length
Standard
Mitered
on
Trim
Length
One End
71-9/16" 120" nominal
71-15/16"
72-3/8"
4' Length
Mitered on
6'
Length
Both
Ends
Mitered on
Both Ends
47-1/16"
47-13/16"
71-1/16"
71-13/16"
48-5/8"
72-5/8"
6' Length
Length
8'
Mitered
Mitered on
on
One
End
Both Ends
1 Ft. Cross-Tee
5. 4 At ta ch T r i m C l i p s t o M ai n B e a m s an d C ro ss T e e s
Attach trim clips (item FXTBC) to the end of each main beam
and cross tee by positioning as shown in the drawing. The
top of the clip should touch the bottom of the bulb of the
suspension system and the end of the main beam should align
with the bend in the clip.
T-Bar Hook Flange
Panel Flange
Outside Edges of Miter
47-13/16"
48-5/8"
6' Length
Mitered on
Bothone
Endspiece
Test
T-Bar Hook Flange
Panel Flange
Outside Edges of Miter
71-9/16"95-1/16"
71-15/16"
95-13/16"
72-3/8" 96-5/8"
of trim running the length of install to make
71-1/16"
sure the FXTBC clips are71-13/16"
positioned correctly (measurement
72-5/8"
from
T-Bar hook flange to
cross tee should be 23-1/16" –
8' Length
standard
Mitered on24" x 24" suspension system opening).
Both Ends
95-1/16"
95-13/16"
96-5/8"
Secure each clip with two pop rivets or #8 sheet metal screws
(screws are used so clips can be adjusted).
FXTBC
23-1/16"
5. 5 C u t a n d M i t e r T ri m
MetalWorks™ Concealed Trim (item 6656M1) is available in 10'
lengths with six pieces per carton. Cut trim sections and miter
ends accordingly. Trim can be field-mitered using a power
miter saw equipped with a blade designed to cut aluminum.
FXTBC Location
5 .5 .1 At t ac h S plic e P lat e s t o T rim
Steel splice plates (item FX4SPLICE) are used to align and
secure all joints between sections of trim. Two splice plates
are required at each joint. Bend the splice plate at the center
notches to form the desired corner angle. Splice plates are
secured to the trim sections using factory-installed setscrews.
Where desired, it may be beneficial to caulk or tape the
backside of the joints to prevent light transmission. To install
splice plates, position the splice plate in the bosses on the
inside of the trim.
FX4SPLICE
Flange
that aligns
T-Bar Hook
6"
Flange
that aligns
Panel Edge
MW Concealed Trim
SCALE 1 : 1
6
FX4SPLICE
5. 5 . 2 In s t a l l T r i m
Install trim sections to main beams and cross tees by
fastening FXTBC clip to trim. Make sure all main beams
and cross tees stay straight and square while the trim is
installed (main beam and cross tee position is critical for
panel installation).
To secure splice plates for straight trim joints, pull the trim
tightly together for the best fit. Use a 1/8" hex key wrench to
tighten the setscrews that secure splice to trim. CAUTION: Do
not over-tighten these screws to the point where they distort
the face of the trim. When splicing straight sections of trim
together, the trim joint should fall between the suspension
system connections, as detailed below, so it will not interfere
with the FXTBC and suspension system connection. Trim
for clouds wider than 8' should be cut so the joint is located
between cross tee connections.
FXTBC
5 .6 Ins t all t he P ane ls
5 .6 .1 F irs t Ro w
First row panels are installed with the open side of the
clips facing the trim. Raise the hooks above the level of the
suspension system and move the panel toward the wall.
Lower the clips onto the bulbs of the main beams. The clips
will fit between the cross tees and center the panels under the
suspension system opening.
5 .6 .2 Middle Ro ws
Apply hooks to the remaining full-size panels and install in the
same direction as the first row.
5. 5 . 3 C o r n e r a n d S t rai g h t J o i n t A s s e m b l y wi t h
Sp l i ce Pl a te s
To secure each corner, position the mitered corner for correct
alignment and tighten the two setscrews on the splice plate
(item FX4SPLICE). Fasten the corner splice plates by starting
at one corner and working around to the other three corners.
Then, fasten the splice plate at the flat joints.
5 .6 .3 L as t Ro w
Panels in the last row are reversed so that they install with the
open side of the hooks facing the trim. Prepare the panels as
detailed in section 3.0. Raise the factory end of the panel up
and over the end of the one in the next to last row to allow the
hooks to clear the suspension system. Shift the panel up and
toward the wall to engage the hooks onto the main beams.
6 . Seismic Restraint
MetalWorks™ Concealed has been engineered for application
in seismic areas. This system has been successfully tested
in applications simulating seismic design categories D, E,
and F. For applications in seismic zones, review the following
guidelines. Check local code for the need for lateral bracing
and/or compression posts/splay wires, perimeter wires, and
for additional installation requirements.
7
more information
For more information, or for an Armstrong representative, call 1 877 ARMSTRONG.
For complete technical information, detail drawings, CAD design assistance,
installation information, and many other technical services, call TechLine services at
1 877 armstrong or FAX 1 800 572 TECH.
SM
For the latest product selection and specification data, visit armstrong.com/metalworks
U.S. Patents Pending, including US Publication No. 2004/0182022.
All trademarks used herein are the property of AWI Licensing Company and/or its affiliates
© 2013 AWI Licensing Company • Printed in the United States of America
BPLA-297890-413
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