page 20
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OPERATOR INSTALLATION
SECTION 7
Steel Rack
FIGURE 12. STEEL RACK ABOVE PINION
1. Includes 3mm clearance required between rack and pinion
2. Distance between bottom of the Foundation Plate and bottom edge of the Rack Tooth
If there is space to mount the rack underneath without fouling the ground as the
gate moves, the following are the pros and cons:
Pros
• The rack is more hidden from view
•
It provides a very effective anti-lift bracket
• It ensures that, since the gate beds in, the rack does not drop onto the
pinion, loading the operator unnecessarily
Cons
• Rack teeth face up vertically, potentially collecting dirt
• Could require the use of a custom bracket
To ensure that the operator does not protrude into the driveway, install the base plate at
least flush with the driveway entrance.
It is typical to mount the rack above the pinion as shown in Figures 12, 14 and 16 for
each type of rack considered. However, in each case, Figures 13, 15 and 17 show the
rack mounted underneath.
7.1.3. Locating the Operator's Position
The measurements given below are based on the three different racks
supplied by Centurion Systems (Pty) Ltd and are to be used as
guidelines only.
11mm
25mm
83mm
115.2mm
1,2
167.2mm
1
25mm
(Typical Steel
Rack Width)
Flat bar welded
to foundation plate
and rail
Concrete Foundation
(Recommended
to
allow
for adjustment)
Minimum space from edge
of foundation plate to
reference point of edge that
protrudes the furthest.
(Section 7.1.1.)
Foundation Plate
49mm-51mm
