9
Installation Instructions
Setting the Forms for the
Concrete Mounting Slab
You need to lay out the concrete forms (see Fig. 3) so
that the top surface is level with the top of the bottom
frame member of the gate. The depth of the concrete
slab should be at least 18 in. (457 mm) below ground
level or just below the frost line, whichever is greater.
(Your soil conditions will also determine the size of the
concrete footing.)
Locate the electrical conduits (one for high- and one for
low-voltage lines) in the concrete forms so that they
protrude from the top approximately 1/2 in.
(13 mm). The conduits should be placed 6-1/4 in. (160
mm) from the right edge of the foundation plate (facing
the operator and gate) and 4-1/2 in. (114 mm) from the
inside edge to line up with the hole in the foundation
plate.
After the concrete is poured in the forms and before it
has a chance to set, insert the foundation plate into the
cement and position it flush with the top of the concrete
and aligned with the top of the lower gate frame. Allow
the concrete to set for a minimum of two days prior to
installing the operator.
Mounting the Operator
on the Concrete Slab
Follow the instructions below that apply to the version
of the operator you are installing.
Chain Operator
First decide whether you want to use the mounting
brackets attached to the operator. The attached
mounting brackets require you to weld the brackets to
the foundation plate.
Two optional mounting brackets allow you to bolt the
operator to the mounting plate. If you would rather bolt
the operator to the foundation plate, remove the
attached mounting brackets, retain the paper gasket, and
bolt on the optional brass mounting brackets.
As shown in Figure 4, place the operator on the
foundation plate with the sprocket facing the gate and
with approximately 1-3/8 in. (35 mm) between the
inside edge of the gate frame and the center of the drive
sprocket.
While placing the operator on the foundation plate,
thread the electrical wiring through the conduit in the
operator as shown in Figure 5.
Secure the gate chain brackets to the vertical front and
back posts of the gate leaf using the
U
bolts provided.
Set the height of the gate chain brackets so that the
center of each idler sprocket (located on either side of
the drive sprocket) is slightly higher than the center line
of the brackets. This alignment will compensate for any
sag in the chain.
Place the chain over the top of the idler sprockets and
under the drive sprocket (see Fig. 6).
Gate frame
Centerline of fence
Inside face
of gate
2 in. (51 mm)
10 1/2 in. (267 mm)
by 6 in. (152 mm)
Mounting plate
12 in.
(305 mm)
minimum
18 in.
(457 mm)
Concrete pad
3 3/4 in.
(95 mm)
Ground level
Cement should extend below
the frostline or at least
18 in. (457 mm) below
ground level
1/2 in.
(13 mm)
Foundation
plate
Conduits: High
and low voltage
in separate
conduits
(a)
(b)
Figure 3. Concrete mounting slab: (a) top view and (b) side view
Foundation plate
Summary of Contents for 746 ER CAT
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