6
All components must be connected to a SAFETY
EARTH GROUND where indicated. The SAFETY
EARTH GROUND must conform to the 1996 National
Electric Code Section 250-81 section (a) or section (c)
for a grounding electrode system.
PREPARATION PRIOR TO INSTALLATION
Before beginning the installation process, verify that the
planned driveway approach meets the following product
requirements. Refer to Application Requirements and
Survey, page 3.
Concrete Material
The driveway surface must be constructed of concrete
for the 10-foot-wide by 22-foot-long area occupied by an
installed WHEEL-LOK
™
restraint. Minimum thickness of
the concrete driveway is 6". Any other material must be
approved by RITE-HITE
®
before installation.
Changing Slopes
The WHEEL-LOK
™
vehicle restraint track can flex 4" to
conform to changes in the slope of the driveway. To
determine the amount of change in the slope of the
driveway, follow these steps.
1.
Set up a string stretched tightly between the dock
face and the approximate area of the
WHEEL-LOK
™
sled (approximately 20'). This string
should be elevated from the driveway by the same
distance at each end and should not contact
driveway between these two anchor points.
2.
Measure how much difference there is between
the string and the surface of the driveway at 12"
intervals along the length of the string. See
Driveway Approach in the Application
Requirements and Survey, page 3.
3.
If all adjacent measurements vary by less than
1/2", the track can be successfully anchored to the
driveway, flexing to accommodate the driveway
slope.
4.
If the driveway has an apron (or sloped portion
near the building) that causes the difference in two
adjacent measurements to exceed 1/2", the apron
must be cut away to facilitate installation of the
WHEEL-LOK
™
restraint.
5.
If any two adjacent measurements vary by 1/2" or
more, and the difference cannot be resolved by
apron removal, contact the RITE-HITE Corporation
before proceeding with any installation procedures.
DO NOT SHIM TRACK TO ACCOMMODATE
EXCESSIVE SLOPE CHANGES.
Driveway Surface Condition
The concrete approach must be free from discontinuities
(cracks or potholes) greater than 1" in variation where
the sled will travel.
Trench Drains
If the WHEEL-LOK
™
restraint crosses trench drains
located parallel to the dock face, the drain grate should
be fully covered with steel plates in the WHEEL-LOK
™
roller wheel path. If the trench drain lies in a position
that holds track anchor points, a steel bridge across the
drain must be welded to the track anchor points and
both ends of the bridge plate must be securely
anchored to the concrete.
