Installation To Solid Concrete Or Cinder Block - NEC E321 Installation And Assembly Manual

Installation to Solid Concrete or Cinder Block

• When installing this wall mount on cinder block, verify that you have a minimum of 1-3/8" of actual concrete thickness
in the hole to be used for the concrete anchors. Do not drill into mortar joints! Be sure to mount in a solid part of the
block, generally 1" minimum from the side of the block. Cinder block must meet ASTM C-90 specifications. It is
suggested that a standard electric drill on slow setting is used to drill the hole instead of a hammer drill to avoid
breaking out the back of the hole when entering a void or cavity.
• Concrete must be 2000 psi density minimum. Lighter density concrete may not hold concrete anchor.
• Make sure that the supporting surface will safely support the combined load of the equipment and all attached hard-
ware and components.
Make sure that wall plate (A) is level, use it as a
1
template to mark four mounting holes. Drill four 5/16"
(8 mm) dia. holes to a minimum depth of 2.5" (64
mm). Insert anchors (E) in holes flush with wall as
shown (right). Place wall plate over anchors and
secure with #14 x 2.5" screws (D). Level, then
tighten all fasteners.
WARNING
• Tighten screws so that wall plate is firmly attached,
but do not overtighten. Overtightening can damage
screws, greatly reducing their holding power.
• Never tighten in excess of 80 in. • lb (9 N.M.).
WARNING
• Always attach concrete anchors directly to load-
bearing concrete.
• Never attach concrete anchors to concrete covered
with plaster, drywall, or other finishing material. If
mounting to concrete surfaces covered with a finishing
surface is unavoidable (not evaluated by UL), the
finishing surface must be counterbored as shown
below. Be sure concrete anchors do not pull away
from concrete when tightening screws. If plaster/
drywall is thicker than 5/8", custom fasteners must be
supplied by installer. (not evaluated by UL)
INCORRECT
wall
plate
plaster/
dry wall
concrete
wall
plate
plaster/
dry wall
WARNING
1
Drill holes and insert anchors (E).
2
Place plate (A) over anchors (E) and secure with screws (D).
3
Tighten all fasteners.
D
CORRECT
concrete
5 of 7
A
D
E
A
ISSUED: 03-26-10 SHEET #: 125-9106-3 08-04-10
concrete
surface
E
E