Installation Instructions CMA345
5
INSTALLATION AND ASSEMBLY
These CMA mounts are designed for attachment to a 2" x 6"
wood framework ceiling, a concrete ceiling or a suspended
metal framing channel ceiling, and provides vertical
adjustments in 3/4" increments.
WARNING: Do NOT attach to vertical mounting surfaces
such as walls or angled ceilings!
WARNING: IMPROPER INSTALLATION CAN LEAD TO
LIFT FALLING CAUSING SEVERE PERSONAL INJURY OR
DAMAGE TO EQUIPMENT! It is the installer’s responsibility
to make certain the structure to which the mount is being
attached is capable of supporting five times the weight of the
CMA mount and all attached equipment. Reinforce the
structure as required before installing the mount.
NOTE: The following instructions assume a suitable mounting
structure and surface exists prior to installation.
Installing to a Wood Framework (Joists)
1. Using CMA345 as a template, mark and drill 1/4" pilot holes
at desired mounting location. Make sure holes are centered
on wood studs.
IMPORTANT ! : If using only two bolt holes for mounting,
either two middle opposing holes (scenario 1) or two
diagonally opposing holes (scenarios 2 and 3) must be
used. See Figure 1 for the ONLY acceptable two-bolt
mounting scenarios.
Figure 1
2. Use 3/8" x 2-1/2" (minimum) Grade 2 lag screws (not
provided) to secure CMA mount to the joists or wood
framework, using the bolt holes noted. (See Figure 2)
Figure 2
Installing to a Suspended Ceiling
NOTE:
The CMA mount may be suspended from four 3/8 in.
diameter ASTM A307 or better threaded rods (not
provided) which are secured to a 1-5/8" x 1-5/8" 12ga
metal framing strut channel (spanning a maximum of 4
feet--not provided) by ASTM A307 or better 3/8"
channel nuts (not provided). Threaded rods must have
16 threads per square inch.
1. Insert the rods into the four bolt holes in the CMA mount.
(See Figure 2)
2. Secure the threaded rods to the CMA mount with ASTM
A307 or better 3/8" jam nuts (not provided) and washers
(one of each on inside and one of each on outside-not
provided).
Installing to a Solid Concrete Ceiling Structure
WARNING: The CMA345 is designed to be mounted to a
concrete ceiling with a minimum thickness of 8" and a
maximum drywall covering of 5/8".
WARNING: Fischer Ux10 anchors (not provided) must be
installed into structurally sound solid concrete. Installation
into hollow concrete block, mortar, or concrete that exhibits
cracking, spalling, or other defects may result in failure of
anchor and serious personal injury or damage to equipment.
1. Use four Ux10 anchors (not provided) to secure CMA mount
into solid concrete ceiling. (See Figure 2)
2. Place CMA mount over anchors, aligning bolt holes in CMA
mount with installed anchors.
3. Secure CMA mount to ceiling using four 3/8" Grade 2 flat
washers (not provided) and four 3/8" x 2-1/2" Grade 2 bolts
(not provided) tightened over anchors.
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