CHIEF CMA450 User manual

SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
1 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
The CMA-450 Reinforcing Kit provides a sturdy support for LCD/DLP hanging brackets
(and certain other products) when installing these products in a suspended ceiling.
The Kit includes a 24 x 24 in. (610 x 610 mm) reinforcing plate that will be suspended
by four tie wires from the true ceiling above the suspended ceiling tiles. Turnbuckles
allow the installation to be fine-tuned.
The reinforcing plate can be installed in place of a standard 2 x 2 in. ceiling tile, or it
can be installed above the suspended ceiling.
Important Warnings and Precautions !
WARNING: A WARNING alerts you to the possibility of serious injury or death if you
do not follow the instructions.
CAUTION: A CAUTION alerts you to the possibility of damage or destruction of
equipment if you do not follow the corre-sponding instructions.
WARNING: Improper installation can result in serious personal injury! Make sure that
the ceiling structural mem-bers can support a redundant weight factor five times the
total weight of the equipment: if not, reinforce the ceiling before installing the
suspended ceiling kit.
WARNING: Be aware also of the potential for personal injury or damage to the unit
if it is not adequately mounted.
WARNING: The installer is responsible for verifying that the ceiling to which the
CMA-450’s reinforcing plate is anchored will safely support the combined load of all
attached components or other equipment.
WARNING: The weight of the LCD/DLP projector must not exceed 250 lbs (113.4 kg),
the maximum load capacity of the reinforcing plate.
CAUTION: To avoid personal injury or damage to the suspended ceiling kit, be sure
that it is installed square and parallel in all dimensions. Avoid stressing the unit at any
time while you are installing it.
CAUTION: Check the unit for shipping damage before you begin the installation.
Before You Begin
CAUTION: To prevent damage to the Kit, which could affect or void the
Factory warranty, and to the equipment that will be attached to it,
thoroughly study all instructions and illustrations before you begin the
installation. Pay particular attention to the “Important Precautions” on
Page 1.
The ceiling tray is designed to fit within a 24 x 24 in. (610 x 610 mm) section of a
conventional suspended ceiling system. If mounted in a 2’ X 2’ suspended ceiling,
runners should have a “T” cross-section and a minimum height of 1.5 in. (38 mm). If
24 x 48 in. (610 x 1219 mm) ceiling tiles are used, cut one tile in half and add another
24-in. (610-mm) ceiling runner, to make a 24 x 24 in. section. If mounted above the
ceiling, the mount may be adjusted to fit anywhere in the 48” tile space.
If you have any questions about this installation, contact Chief Manufacturing at 1-
800-582-6480.
In certain installations, it may be easier to install the ceiling anchors (page 3) before
you attach the hanger brackets to the ceiling tray.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
2 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Contents
TOOLS REQUIRED FOR INSTALLATION 2
ASSEMBLY PROCEDURES 2
ATTACH THE HANGER BRACKETS TO THE CEILING TRAY 2
ANCHOR THE TRAY TO THE CEILING 3
SECURE THE SAFETY CABLE 4
PARTS 4
Tools required for installation
• Phillips screwdrivers, No. 1 and No. 2 tip
• Drill and bit set
• Pliers (heavy-duty)
• Wire cutter
• Hammer (claw type), if suspending from a solid concrete ceiling.
• Other tools may be required depending on the method of installing the 
unit in the ceiling.

Assembly Procedures
Attach the Hanger Brackets to the Cieling Tray
1. Using two 1/4” x 20 x 3/8” Phillips-head screws (B), attach four hanger brackets (D)
to the four corners of the mounting plate bracket (A).
2. Remove the tiles from the area where the ceiling tray is being mounted.
3. Place the ceiling tray in its mounting location and mark the mounting hole where
the tile will protrude from the ceiling.
4. Remove the ceiling tray and tile and cut a 1 1/2” (38.1 mm), or slightly larger, hole in
the tile.
5. Install the ceiling tile and ceiling tray and clamp the ceiling tray to the ceiling track.
6. Install electrical outlet box(es) in the openings from the knock-out panels.
7. Place the ceiling tray into the 24 x 24 in. (610 x 610 mm) opening in the ceiling in
place of a ceiling tile, or mount the tray above the ceiling in the 24” x 48” (610 x
1219 mm) space. Depending on where the ceiling tray is located, one or two pieces of
ceiling track may need to be added.
NOTE: Do not tighten the screws until all four clamps are attached and the
tray is properly positioned on the runners.
8. Using hanger bracket clamps (E) and 1/4” x 20 x 1” Phillips-head screws (C), clamp
the ceiling tray to the ceiling runners.
9. Hook turnbuckles (F) into the hanger brackets.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
3 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Anchor the Tray to the Ceiling
NOTE: If the true ceiling is more than 36 in. (914 mm) above the suspended ceiling, you
must obtain additional anchoring wire (G). Use 12-gauge annealed, steel, black wire. A
longer safety cable (item H in parts on page 5) may also be required. Contact Chief
Manufacturing for assistance in determining your specific requirements.
Anchoring Methods
Select the appropriate anchoring method for your ceiling:
NOTE: Four eye lag screws and four concrete anchors are shipped with the Kit.
Wood Joists or Beams. Drill four 5/32-in. dia. holes, at least 2 in. deep (4-mm dia.
holes, 51 mm deep). Fully insert eye lag screws (K).
Solid Concrete.
1. Drill four 1/4-in. dia. holes 1-3/8 in. deep (6-mm dia. holes, 36 mm deep). Use ANSI
B94.12-1977 carbide bit.
2. Tap anchors (L) into hole to an embeded depth of at least 1” (25.4 mm deep).
3. Using a hammer with a claw, pull anchor (L) out 1/4”
(6.36 mm) to activate anchor.
Truss Ceiling. Attach the tie wire to the turnbuckle and loop its upper end around the
ceiling truss. Pull the tie wire tight and twist it around itself at least four times. No
additional anchor is required.
Anchoring Procedure
1. Cut the 20-ft (6.1 m) tie wire (G) into four pieces of equal length.
2. Insert the wires through the ends of the turnbuckles. Twist each wire around itself
at least four times.
3. If required (see “Anchoring Methods” above), drill holes for the four ceiling anchors.
Position the holes so that the tie wires (G), when attached and taut, will angle
outward at 150as shown.
4. For all anchoring methods, drill an anchor hole for the safety wire directly above the
center of the ceiling tray. Do not attach the safety cable yet (see page 4).
5. Pull the tie wires tight and attach them to the ends of the ceiling anchors (or to the
truss). Again twist each wire around itself at least four times.
The weight of the ceiling tray should now be supported by the tie wires.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
4 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Secure the Safety Cable
WARNING: It is the responsibility of the installer to verify that the ceiling
to which the Kit is anchored will safety support the combined load of all
attached components and equipment.
1. Run the safety cable (H) through the remaining ceiling anchor. Pass each end
through the holes in the ceiling plate reinforcements and join them with the cable
clamp (J). Do not tighten yet!
2. Attach all components and equipment to the reinforcing plate. Refer to the
instructions supplied with them.
3. After all components are attached, tension the tie wires by adjusting the
turnbuckles (F).
WARNING: The load must be carried by the tie wires, not by the suspended
ceiling runners.
4. Take up the slack in the safety cable (H), leaving it slightly loose. Tighten both
safety cable clamps (J).
Parts
Ref Description. Part No. Qty
A BRACKET, plate, mounting 1600-000038-012 1
B SCREW, Phillips-head, 1/4” x 20 x 3/8” 0101-000010 8
C SCREW, Phillips-head, 1/4” x 20 x 1” 0101-000002 4
D BRACKET, hanger 1600-000036-012 4
E CLAMP, hanger bracket 1600-000035-012 4
F TURNBUCKLE, 1/4-20 with hook and loop 0999-000023 4
G WIRE, 12 gage, 20 ft (6.1 m) 0975-000000 1
H CABLE, 1/8”, 10 ft. (3 m) [not shown] 0975-000001 1
J CLIP, wire rope (for 1/8” wire) 0999-000022 2
K SCREW, lag, eye 0999-000036 4
L ANCHOR, concrete 0999-000037 4
M BRACKET, center bolt 1600-000040-012 1
N BRACKET, ceiling mount, 1600-000039-012 1
P NUT, 1/4-20 4
Q WASHER, 1/4 in 4
R RING, escutcheon ACC-640 1
Hanger brackets for
support wires and
turnbuckles
Knockouts for electrical outlet
boxes and antenna leads
Attachment point for safety
cable and clamp
Adjustable bracket for
attaching LCD/DLP
mounting bracket
A
D
B
A
A
Wood Joists
or beams
Solid Concrete Truss Ceilings
B
C
D
E
F
J
K
A
M
N
P
Q
L
R
See items M, N, P, Q
See items B, C, D

SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
1 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
The CMA-450 Reinforcing Kit provides a sturdy support for LCD/DLP hanging brackets
(and certain other products) when installing these products in a suspended ceiling.
The Kit includes a 24 x 24 in. (610 x 610 mm) reinforcing plate that will be suspended
by four tie wires from the true ceiling above the suspended ceiling tiles. Turnbuckles
allow the installation to be fine-tuned.
The reinforcing plate can be installed in place of a standard 2 x 2 in. ceiling tile, or it
can be installed above the suspended ceiling.
Important Warnings and Precautions !
WARNING: A WARNING alerts you to the possibility of serious injury or death if you
do not follow the instructions.
CAUTION: A CAUTION alerts you to the possibility of damage or destruction of
equipment if you do not follow the corre-sponding instructions.
WARNING: Improper installation can result in serious personal injury! Make sure that
the ceiling structural mem-bers can support a redundant weight factor five times the
total weight of the equipment: if not, reinforce the ceiling before installing the
suspended ceiling kit.
WARNING: Be aware also of the potential for personal injury or damage to the unit
if it is not adequately mounted.
WARNING: The installer is responsible for verifying that the ceiling to which the
CMA-450’s reinforcing plate is anchored will safely support the combined load of all
attached components or other equipment.
WARNING: The weight of the LCD/DLP projector must not exceed 250 lbs (113.4 kg),
the maximum load capacity of the reinforcing plate.
CAUTION: To avoid personal injury or damage to the suspended ceiling kit, be sure
that it is installed square and parallel in all dimensions. Avoid stressing the unit at any
time while you are installing it.
CAUTION: Check the unit for shipping damage before you begin the installation.
Before You Begin
CAUTION: To prevent damage to the Kit, which could affect or void the
Factory warranty, and to the equipment that will be attached to it,
thoroughly study all instructions and illustrations before you begin the
installation. Pay particular attention to the “Important Precautions” on
Page 1.
The ceiling tray is designed to fit within a 24 x 24 in. (610 x 610 mm) section of a
conventional suspended ceiling system. If mounted in a 2’ X 2’ suspended ceiling,
runners should have a “T” cross-section and a minimum height of 1.5 in. (38 mm). If
24 x 48 in. (610 x 1219 mm) ceiling tiles are used, cut one tile in half and add another
24-in. (610-mm) ceiling runner, to make a 24 x 24 in. section. If mounted above the
ceiling, the mount may be adjusted to fit anywhere in the 48” tile space.
If you have any questions about this installation, contact Chief Manufacturing at 1-
800-582-6480.
In certain installations, it may be easier to install the ceiling anchors (page 3) before
you attach the hanger brackets to the ceiling tray.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
2 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Contents
TOOLS REQUIRED FOR INSTALLATION 2
ASSEMBLY PROCEDURES 2
ATTACH THE HANGER BRACKETS TO THE CEILING TRAY 2
ANCHOR THE TRAY TO THE CEILING 3
SECURE THE SAFETY CABLE 4
PARTS 4
Tools required for installation
• Phillips screwdrivers, No. 1 and No. 2 tip
• Drill and bit set
• Pliers (heavy-duty)
• Wire cutter
• Hammer (claw type), if suspending from a solid concrete ceiling.
• Other tools may be required depending on the method of installing the 
unit in the ceiling.

Assembly Procedures
Attach the Hanger Brackets to the Cieling Tray
1. Using two 1/4” x 20 x 3/8” Phillips-head screws (B), attach four hanger brackets (D)
to the four corners of the mounting plate bracket (A).
2. Remove the tiles from the area where the ceiling tray is being mounted.
3. Place the ceiling tray in its mounting location and mark the mounting hole where
the tile will protrude from the ceiling.
4. Remove the ceiling tray and tile and cut a 1 1/2” (38.1 mm), or slightly larger, hole in
the tile.
5. Install the ceiling tile and ceiling tray and clamp the ceiling tray to the ceiling track.
6. Install electrical outlet box(es) in the openings from the knock-out panels.
7. Place the ceiling tray into the 24 x 24 in. (610 x 610 mm) opening in the ceiling in
place of a ceiling tile, or mount the tray above the ceiling in the 24” x 48” (610 x
1219 mm) space. Depending on where the ceiling tray is located, one or two pieces of
ceiling track may need to be added.
NOTE: Do not tighten the screws until all four clamps are attached and the
tray is properly positioned on the runners.
8. Using hanger bracket clamps (E) and 1/4” x 20 x 1” Phillips-head screws (C), clamp
the ceiling tray to the ceiling runners.
9. Hook turnbuckles (F) into the hanger brackets.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
3 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Anchor the Tray to the Ceiling
NOTE: If the true ceiling is more than 36 in. (914 mm) above the suspended ceiling, you
must obtain additional anchoring wire (G). Use 12-gauge annealed, steel, black wire. A
longer safety cable (item H in parts on page 5) may also be required. Contact Chief
Manufacturing for assistance in determining your specific requirements.
Anchoring Methods
Select the appropriate anchoring method for your ceiling:
NOTE: Four eye lag screws and four concrete anchors are shipped with the Kit.
Wood Joists or Beams. Drill four 5/32-in. dia. holes, at least 2 in. deep (4-mm dia.
holes, 51 mm deep). Fully insert eye lag screws (K).
Solid Concrete.
1. Drill four 1/4-in. dia. holes 1-3/8 in. deep (6-mm dia. holes, 36 mm deep). Use ANSI
B94.12-1977 carbide bit.
2. Tap anchors (L) into hole to an embeded depth of at least 1” (25.4 mm deep).
3. Using a hammer with a claw, pull anchor (L) out 1/4”
(6.36 mm) to activate anchor.
Truss Ceiling. Attach the tie wire to the turnbuckle and loop its upper end around the
ceiling truss. Pull the tie wire tight and twist it around itself at least four times. No
additional anchor is required.
Anchoring Procedure
1. Cut the 20-ft (6.1 m) tie wire (G) into four pieces of equal length.
2. Insert the wires through the ends of the turnbuckles. Twist each wire around itself
at least four times.
3. If required (see “Anchoring Methods” above), drill holes for the four ceiling anchors.
Position the holes so that the tie wires (G), when attached and taut, will angle
outward at 150as shown.
4. For all anchoring methods, drill an anchor hole for the safety wire directly above the
center of the ceiling tray. Do not attach the safety cable yet (see page 4).
5. Pull the tie wires tight and attach them to the ends of the ceiling anchors (or to the
truss). Again twist each wire around itself at least four times.
The weight of the ceiling tray should now be supported by the tie wires.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
4 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Secure the Safety Cable
WARNING: It is the responsibility of the installer to verify that the ceiling
to which the Kit is anchored will safety support the combined load of all
attached components and equipment.
1. Run the safety cable (H) through the remaining ceiling anchor. Pass each end
through the holes in the ceiling plate reinforcements and join them with the cable
clamp (J). Do not tighten yet!
2. Attach all components and equipment to the reinforcing plate. Refer to the
instructions supplied with them.
3. After all components are attached, tension the tie wires by adjusting the
turnbuckles (F).
WARNING: The load must be carried by the tie wires, not by the suspended
ceiling runners.
4. Take up the slack in the safety cable (H), leaving it slightly loose. Tighten both
safety cable clamps (J).
Parts
Ref Description. Part No. Qty
A BRACKET, plate, mounting 1600-000038-012 1
B SCREW, Phillips-head, 1/4” x 20 x 3/8” 0101-000010 8
C SCREW, Phillips-head, 1/4” x 20 x 1” 0101-000002 4
D BRACKET, hanger 1600-000036-012 4
E CLAMP, hanger bracket 1600-000035-012 4
F TURNBUCKLE, 1/4-20 with hook and loop 0999-000023 4
G WIRE, 12 gage, 20 ft (6.1 m) 0975-000000 1
H CABLE, 1/8”, 10 ft. (3 m) [not shown] 0975-000001 1
J CLIP, wire rope (for 1/8” wire) 0999-000022 2
K SCREW, lag, eye 0999-000036 4
L ANCHOR, concrete 0999-000037 4
M BRACKET, center bolt 1600-000040-012 1
N BRACKET, ceiling mount, 1600-000039-012 1
P NUT, 1/4-20 4
Q WASHER, 1/4 in 4
R RING, escutcheon ACC-640 1
Hanger brackets for
support wires and
turnbuckles
Knockouts for electrical outlet
boxes and antenna leads
Attachment point for safety
cable and clamp
Adjustable bracket for
attaching LCD/DLP
mounting bracket
A
D
B
A
A
Wood Joists
or beams
Solid Concrete Truss Ceilings
B
C
D
E
F
J
K
A
M
N
P
Q
L
R
See items M, N, P, Q
See items B, C, D

SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
1 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
The CMA-450 Reinforcing Kit provides a sturdy support for LCD/DLP hanging brackets
(and certain other products) when installing these products in a suspended ceiling.
The Kit includes a 24 x 24 in. (610 x 610 mm) reinforcing plate that will be suspended
by four tie wires from the true ceiling above the suspended ceiling tiles. Turnbuckles
allow the installation to be fine-tuned.
The reinforcing plate can be installed in place of a standard 2 x 2 in. ceiling tile, or it
can be installed above the suspended ceiling.
Important Warnings and Precautions !
WARNING: A WARNING alerts you to the possibility of serious injury or death if you
do not follow the instructions.
CAUTION: A CAUTION alerts you to the possibility of damage or destruction of
equipment if you do not follow the corre-sponding instructions.
WARNING: Improper installation can result in serious personal injury! Make sure that
the ceiling structural mem-bers can support a redundant weight factor five times the
total weight of the equipment: if not, reinforce the ceiling before installing the
suspended ceiling kit.
WARNING: Be aware also of the potential for personal injury or damage to the unit
if it is not adequately mounted.
WARNING: The installer is responsible for verifying that the ceiling to which the
CMA-450’s reinforcing plate is anchored will safely support the combined load of all
attached components or other equipment.
WARNING: The weight of the LCD/DLP projector must not exceed 250 lbs (113.4 kg),
the maximum load capacity of the reinforcing plate.
CAUTION: To avoid personal injury or damage to the suspended ceiling kit, be sure
that it is installed square and parallel in all dimensions. Avoid stressing the unit at any
time while you are installing it.
CAUTION: Check the unit for shipping damage before you begin the installation.
Before You Begin
CAUTION: To prevent damage to the Kit, which could affect or void the
Factory warranty, and to the equipment that will be attached to it,
thoroughly study all instructions and illustrations before you begin the
installation. Pay particular attention to the “Important Precautions” on
Page 1.
The ceiling tray is designed to fit within a 24 x 24 in. (610 x 610 mm) section of a
conventional suspended ceiling system. If mounted in a 2’ X 2’ suspended ceiling,
runners should have a “T” cross-section and a minimum height of 1.5 in. (38 mm). If
24 x 48 in. (610 x 1219 mm) ceiling tiles are used, cut one tile in half and add another
24-in. (610-mm) ceiling runner, to make a 24 x 24 in. section. If mounted above the
ceiling, the mount may be adjusted to fit anywhere in the 48” tile space.
If you have any questions about this installation, contact Chief Manufacturing at 1-
800-582-6480.
In certain installations, it may be easier to install the ceiling anchors (page 3) before
you attach the hanger brackets to the ceiling tray.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
2 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Contents
TOOLS REQUIRED FOR INSTALLATION 2
ASSEMBLY PROCEDURES 2
ATTACH THE HANGER BRACKETS TO THE CEILING TRAY 2
ANCHOR THE TRAY TO THE CEILING 3
SECURE THE SAFETY CABLE 4
PARTS 4
Tools required for installation
• Phillips screwdrivers, No. 1 and No. 2 tip
• Drill and bit set
• Pliers (heavy-duty)
• Wire cutter
• Hammer (claw type), if suspending from a solid concrete ceiling.
• Other tools may be required depending on the method of installing the 
unit in the ceiling.

Assembly Procedures
Attach the Hanger Brackets to the Cieling Tray
1. Using two 1/4” x 20 x 3/8” Phillips-head screws (B), attach four hanger brackets (D)
to the four corners of the mounting plate bracket (A).
2. Remove the tiles from the area where the ceiling tray is being mounted.
3. Place the ceiling tray in its mounting location and mark the mounting hole where
the tile will protrude from the ceiling.
4. Remove the ceiling tray and tile and cut a 1 1/2” (38.1 mm), or slightly larger, hole in
the tile.
5. Install the ceiling tile and ceiling tray and clamp the ceiling tray to the ceiling track.
6. Install electrical outlet box(es) in the openings from the knock-out panels.
7. Place the ceiling tray into the 24 x 24 in. (610 x 610 mm) opening in the ceiling in
place of a ceiling tile, or mount the tray above the ceiling in the 24” x 48” (610 x
1219 mm) space. Depending on where the ceiling tray is located, one or two pieces of
ceiling track may need to be added.
NOTE: Do not tighten the screws until all four clamps are attached and the
tray is properly positioned on the runners.
8. Using hanger bracket clamps (E) and 1/4” x 20 x 1” Phillips-head screws (C), clamp
the ceiling tray to the ceiling runners.
9. Hook turnbuckles (F) into the hanger brackets.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
3 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Anchor the Tray to the Ceiling
NOTE: If the true ceiling is more than 36 in. (914 mm) above the suspended ceiling, you
must obtain additional anchoring wire (G). Use 12-gauge annealed, steel, black wire. A
longer safety cable (item H in parts on page 5) may also be required. Contact Chief
Manufacturing for assistance in determining your specific requirements.
Anchoring Methods
Select the appropriate anchoring method for your ceiling:
NOTE: Four eye lag screws and four concrete anchors are shipped with the Kit.
Wood Joists or Beams. Drill four 5/32-in. dia. holes, at least 2 in. deep (4-mm dia.
holes, 51 mm deep). Fully insert eye lag screws (K).
Solid Concrete.
1. Drill four 1/4-in. dia. holes 1-3/8 in. deep (6-mm dia. holes, 36 mm deep). Use ANSI
B94.12-1977 carbide bit.
2. Tap anchors (L) into hole to an embeded depth of at least 1” (25.4 mm deep).
3. Using a hammer with a claw, pull anchor (L) out 1/4”
(6.36 mm) to activate anchor.
Truss Ceiling. Attach the tie wire to the turnbuckle and loop its upper end around the
ceiling truss. Pull the tie wire tight and twist it around itself at least four times. No
additional anchor is required.
Anchoring Procedure
1. Cut the 20-ft (6.1 m) tie wire (G) into four pieces of equal length.
2. Insert the wires through the ends of the turnbuckles. Twist each wire around itself
at least four times.
3. If required (see “Anchoring Methods” above), drill holes for the four ceiling anchors.
Position the holes so that the tie wires (G), when attached and taut, will angle
outward at 150as shown.
4. For all anchoring methods, drill an anchor hole for the safety wire directly above the
center of the ceiling tray. Do not attach the safety cable yet (see page 4).
5. Pull the tie wires tight and attach them to the ends of the ceiling anchors (or to the
truss). Again twist each wire around itself at least four times.
The weight of the ceiling tray should now be supported by the tie wires.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
4 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Secure the Safety Cable
WARNING: It is the responsibility of the installer to verify that the ceiling
to which the Kit is anchored will safety support the combined load of all
attached components and equipment.
1. Run the safety cable (H) through the remaining ceiling anchor. Pass each end
through the holes in the ceiling plate reinforcements and join them with the cable
clamp (J). Do not tighten yet!
2. Attach all components and equipment to the reinforcing plate. Refer to the
instructions supplied with them.
3. After all components are attached, tension the tie wires by adjusting the
turnbuckles (F).
WARNING: The load must be carried by the tie wires, not by the suspended
ceiling runners.
4. Take up the slack in the safety cable (H), leaving it slightly loose. Tighten both
safety cable clamps (J).
Parts
Ref Description. Part No. Qty
A BRACKET, plate, mounting 1600-000038-012 1
B SCREW, Phillips-head, 1/4” x 20 x 3/8” 0101-000010 8
C SCREW, Phillips-head, 1/4” x 20 x 1” 0101-000002 4
D BRACKET, hanger 1600-000036-012 4
E CLAMP, hanger bracket 1600-000035-012 4
F TURNBUCKLE, 1/4-20 with hook and loop 0999-000023 4
G WIRE, 12 gage, 20 ft (6.1 m) 0975-000000 1
H CABLE, 1/8”, 10 ft. (3 m) [not shown] 0975-000001 1
J CLIP, wire rope (for 1/8” wire) 0999-000022 2
K SCREW, lag, eye 0999-000036 4
L ANCHOR, concrete 0999-000037 4
M BRACKET, center bolt 1600-000040-012 1
N BRACKET, ceiling mount, 1600-000039-012 1
P NUT, 1/4-20 4
Q WASHER, 1/4 in 4
R RING, escutcheon ACC-640 1
Hanger brackets for
support wires and
turnbuckles
Knockouts for electrical outlet
boxes and antenna leads
Attachment point for safety
cable and clamp
Adjustable bracket for
attaching LCD/DLP
mounting bracket
A
D
B
A
A
Wood Joists
or beams
Solid Concrete Truss Ceilings
B
C
D
E
F
J
K
A
M
N
P
Q
L
R
See items M, N, P, Q
See items B, C, D

SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
1 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
The CMA-450 Reinforcing Kit provides a sturdy support for LCD/DLP hanging brackets
(and certain other products) when installing these products in a suspended ceiling.
The Kit includes a 24 x 24 in. (610 x 610 mm) reinforcing plate that will be suspended
by four tie wires from the true ceiling above the suspended ceiling tiles. Turnbuckles
allow the installation to be fine-tuned.
The reinforcing plate can be installed in place of a standard 2 x 2 in. ceiling tile, or it
can be installed above the suspended ceiling.
Important Warnings and Precautions !
WARNING: A WARNING alerts you to the possibility of serious injury or death if you
do not follow the instructions.
CAUTION: A CAUTION alerts you to the possibility of damage or destruction of
equipment if you do not follow the corre-sponding instructions.
WARNING: Improper installation can result in serious personal injury! Make sure that
the ceiling structural mem-bers can support a redundant weight factor five times the
total weight of the equipment: if not, reinforce the ceiling before installing the
suspended ceiling kit.
WARNING: Be aware also of the potential for personal injury or damage to the unit
if it is not adequately mounted.
WARNING: The installer is responsible for verifying that the ceiling to which the
CMA-450’s reinforcing plate is anchored will safely support the combined load of all
attached components or other equipment.
WARNING: The weight of the LCD/DLP projector must not exceed 250 lbs (113.4 kg),
the maximum load capacity of the reinforcing plate.
CAUTION: To avoid personal injury or damage to the suspended ceiling kit, be sure
that it is installed square and parallel in all dimensions. Avoid stressing the unit at any
time while you are installing it.
CAUTION: Check the unit for shipping damage before you begin the installation.
Before You Begin
CAUTION: To prevent damage to the Kit, which could affect or void the
Factory warranty, and to the equipment that will be attached to it,
thoroughly study all instructions and illustrations before you begin the
installation. Pay particular attention to the “Important Precautions” on
Page 1.
The ceiling tray is designed to fit within a 24 x 24 in. (610 x 610 mm) section of a
conventional suspended ceiling system. If mounted in a 2’ X 2’ suspended ceiling,
runners should have a “T” cross-section and a minimum height of 1.5 in. (38 mm). If
24 x 48 in. (610 x 1219 mm) ceiling tiles are used, cut one tile in half and add another
24-in. (610-mm) ceiling runner, to make a 24 x 24 in. section. If mounted above the
ceiling, the mount may be adjusted to fit anywhere in the 48” tile space.
If you have any questions about this installation, contact Chief Manufacturing at 1-
800-582-6480.
In certain installations, it may be easier to install the ceiling anchors (page 3) before
you attach the hanger brackets to the ceiling tray.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
2 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Contents
TOOLS REQUIRED FOR INSTALLATION 2
ASSEMBLY PROCEDURES 2
ATTACH THE HANGER BRACKETS TO THE CEILING TRAY 2
ANCHOR THE TRAY TO THE CEILING 3
SECURE THE SAFETY CABLE 4
PARTS 4
Tools required for installation
• Phillips screwdrivers, No. 1 and No. 2 tip
• Drill and bit set
• Pliers (heavy-duty)
• Wire cutter
• Hammer (claw type), if suspending from a solid concrete ceiling.
• Other tools may be required depending on the method of installing the 
unit in the ceiling.

Assembly Procedures
Attach the Hanger Brackets to the Cieling Tray
1. Using two 1/4” x 20 x 3/8” Phillips-head screws (B), attach four hanger brackets (D)
to the four corners of the mounting plate bracket (A).
2. Remove the tiles from the area where the ceiling tray is being mounted.
3. Place the ceiling tray in its mounting location and mark the mounting hole where
the tile will protrude from the ceiling.
4. Remove the ceiling tray and tile and cut a 1 1/2” (38.1 mm), or slightly larger, hole in
the tile.
5. Install the ceiling tile and ceiling tray and clamp the ceiling tray to the ceiling track.
6. Install electrical outlet box(es) in the openings from the knock-out panels.
7. Place the ceiling tray into the 24 x 24 in. (610 x 610 mm) opening in the ceiling in
place of a ceiling tile, or mount the tray above the ceiling in the 24” x 48” (610 x
1219 mm) space. Depending on where the ceiling tray is located, one or two pieces of
ceiling track may need to be added.
NOTE: Do not tighten the screws until all four clamps are attached and the
tray is properly positioned on the runners.
8. Using hanger bracket clamps (E) and 1/4” x 20 x 1” Phillips-head screws (C), clamp
the ceiling tray to the ceiling runners.
9. Hook turnbuckles (F) into the hanger brackets.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
3 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Anchor the Tray to the Ceiling
NOTE: If the true ceiling is more than 36 in. (914 mm) above the suspended ceiling, you
must obtain additional anchoring wire (G). Use 12-gauge annealed, steel, black wire. A
longer safety cable (item H in parts on page 5) may also be required. Contact Chief
Manufacturing for assistance in determining your specific requirements.
Anchoring Methods
Select the appropriate anchoring method for your ceiling:
NOTE: Four eye lag screws and four concrete anchors are shipped with the Kit.
Wood Joists or Beams. Drill four 5/32-in. dia. holes, at least 2 in. deep (4-mm dia.
holes, 51 mm deep). Fully insert eye lag screws (K).
Solid Concrete.
1. Drill four 1/4-in. dia. holes 1-3/8 in. deep (6-mm dia. holes, 36 mm deep). Use ANSI
B94.12-1977 carbide bit.
2. Tap anchors (L) into hole to an embeded depth of at least 1” (25.4 mm deep).
3. Using a hammer with a claw, pull anchor (L) out 1/4”
(6.36 mm) to activate anchor.
Truss Ceiling. Attach the tie wire to the turnbuckle and loop its upper end around the
ceiling truss. Pull the tie wire tight and twist it around itself at least four times. No
additional anchor is required.
Anchoring Procedure
1. Cut the 20-ft (6.1 m) tie wire (G) into four pieces of equal length.
2. Insert the wires through the ends of the turnbuckles. Twist each wire around itself
at least four times.
3. If required (see “Anchoring Methods” above), drill holes for the four ceiling anchors.
Position the holes so that the tie wires (G), when attached and taut, will angle
outward at 150as shown.
4. For all anchoring methods, drill an anchor hole for the safety wire directly above the
center of the ceiling tray. Do not attach the safety cable yet (see page 4).
5. Pull the tie wires tight and attach them to the ends of the ceiling anchors (or to the
truss). Again twist each wire around itself at least four times.
The weight of the ceiling tray should now be supported by the tie wires.
SUSPENDED CEILING TILE REINFORCING KIT CMA-450
WARNING: IMPROPER INSTALLATION MAY RESULT IN SERIOUS PERSONAL INJURY!
4 OF 4
P800 . 582 . 6480 F877 . 894 . 6918 WCHIEFMFG.COM E CHIEF@ CHIEFMFG.COM A 12800 HWY 13 S., STE. 500, SAVAGE, MN 55378
The overhead support must be capable of supporting five times the weight of the mount and equipment combined. 
If it cannot, it must be reinforced.
Secure the Safety Cable
WARNING: It is the responsibility of the installer to verify that the ceiling
to which the Kit is anchored will safety support the combined load of all
attached components and equipment.
1. Run the safety cable (H) through the remaining ceiling anchor. Pass each end
through the holes in the ceiling plate reinforcements and join them with the cable
clamp (J). Do not tighten yet!
2. Attach all components and equipment to the reinforcing plate. Refer to the
instructions supplied with them.
3. After all components are attached, tension the tie wires by adjusting the
turnbuckles (F).
WARNING: The load must be carried by the tie wires, not by the suspended
ceiling runners.
4. Take up the slack in the safety cable (H), leaving it slightly loose. Tighten both
safety cable clamps (J).
Parts
Ref Description. Part No. Qty
A BRACKET, plate, mounting 1600-000038-012 1
B SCREW, Phillips-head, 1/4” x 20 x 3/8” 0101-000010 8
C SCREW, Phillips-head, 1/4” x 20 x 1” 0101-000002 4
D BRACKET, hanger 1600-000036-012 4
E CLAMP, hanger bracket 1600-000035-012 4
F TURNBUCKLE, 1/4-20 with hook and loop 0999-000023 4
G WIRE, 12 gage, 20 ft (6.1 m) 0975-000000 1
H CABLE, 1/8”, 10 ft. (3 m) [not shown] 0975-000001 1
J CLIP, wire rope (for 1/8” wire) 0999-000022 2
K SCREW, lag, eye 0999-000036 4
L ANCHOR, concrete 0999-000037 4
M BRACKET, center bolt 1600-000040-012 1
N BRACKET, ceiling mount, 1600-000039-012 1
P NUT, 1/4-20 4
Q WASHER, 1/4 in 4
R RING, escutcheon ACC-640 1
Hanger brackets for
support wires and
turnbuckles
Knockouts for electrical outlet
boxes and antenna leads
Attachment point for safety
cable and clamp
Adjustable bracket for
attaching LCD/DLP
mounting bracket
A
D
B
A
A
Wood Joists
or beams
Solid Concrete Truss Ceilings
B
C
D
E
F
J
K
A
M
N
P
Q
L
R
See items M, N, P, Q
See items B, C, D