9
Installation Instructions
WARNING! The condition of the gate structure
itself directly affects the reliability and safety of the
844 Operator.
Setting the Concrete Forms
You need to lay out concrete forms so that the top
surface is at least as high as the bottom frame member
of the gate. Also, the foundation plate will be centered
on all sides of the top of the concrete footing, and the
844 Operator will be centered on all sides of the
foundation plate.
The foundation plate should be made of 3/16 in. (0.5
cm) thick steel and should measure 6 1/4 by 10 5/8 in.
(16 by 27 cm). Hooked J bolts should extend into the
concrete 4 to 6 in. to anchor the foundation plate
securely.
The depth of the concrete slab should be at least 18 in.
(46 cm) below ground level or just below the frost line,
whichever is greater. The concrete should be about 18
in. (along the edge that parallels the gate leaf) by 12 in.
(46 by 30 cm).
Note: Your soil conditions will also determine the
size of the concrete footing.
Within the concrete forms, you need to locate the
electrical conduits (one for high- and one for low-
voltage lines) so that they protrude from the top of the
finished concrete approximately 1/2 in. (13 mm; see
Figure 3).
Gate frame
Ground level
1/2 in.
(13 mm)
Foundation plate
Cement should extend below
the frostline or at least 18 in.
(46 cm) below ground level
Conduits: Separate the
high and low voltage
wires: low voltage wires
in one conduit and high
voltage wires in the
other conduit
Figure 3. Side view of concrete and foundation plate
0 to 2 in.
(0 to 5 cm)
1 1/2 in.
(3.8 cm)
1 1/2 in.
(3.8 cm)
0 to 2 in.
(0 to 5 cm)
8 7/8 in.
(22.5 cm)
(a) left closing
(b) right closing
fully closed
gate leaf
fully closed
gate leaf
6 1/8 in.
(15.5 cm)
Figure 4. The mounting dimensions of the
foundation plate, top view: (a) left closing gate
and (b) right closing gate (from the inside of
the property). Note that neither the concrete
slab nor its dimensions are shown in this
figure.
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