Use this procedure to attach the rack to a concrete (nonraised)
floor.
Attention: It is your responsibility to ensure the following
steps are completed before the service representative performs the tie-down
procedure.
Note: Obtain the service of a qualified structural engineer
to determine appropriate anchoring of the mounting plates. A minimum of five
anchor bolts for each mounting plate must be used to secure the plates to
the concrete floor. Because some of the drilled holes might be aligned with
concrete reinforcement rods below the surface of the concrete floor, additional
holes must be drilled. Each mounting plate must have at least five usable
holes, two that are on the right-hand sides and the other two are on opposite
ends, and one hole at the center. The mounting plates should be able to withstand
1134 kg (2500 lb) pulling force on each end.
- Be sure the rack is in the correct location. To ensure that the holes
are in the correct location, the diagonal distance of the center of the holes
should be 1211.2 mm (47.7 in.). The distance between the center holes to the
center of the next holes should be 654.8 mm (25.8 in.) (the side-to-side distance)
and 1019 mm (40.1 in.) (the front-to-back distance).
Figure 1. Rack tie down (nonraised floor)
- Place the mounting plates (item 1 in the proceeding figure), front and rear,
in the approximate mounting position under the system rack.
- To align the mounting plates to the system rack, do the following:
- Place the four rack-mounting bolts (item 6 in the proceeding figure) through
the plate assembly holes at the bottom of the rack. Install the bushings and
washers (item 4 and 5 in the proceeding figure) to ensure bolt positioning.
Note: The
plastic bushing is intended to provide electrical insulation between the frame
and the ground. When such insulation is not required, the plastic bushing
does not need to be installed.
- Position the mounting plates (item 1 in the proceeding figure) under the four
rack-mounting bolts (item 6 in the previous figure) so that the
mounting bolts are centered directly over the tapped holes.
- Turn the rack-mounting bolts (item 6 in the previous figure) three or four
rotations into the tapped holes.
- Mark the floor around the edge of the mounting plates, as shown in the
following figure:
Figure 2. Mark floor around edge of mounting
plates
- Remove the mounting bolts from the threaded holes.
- Move the rack away from the mounting plates.
- Mark the floor at the center of each hole in the mounting plate (including
tapped holes).
- Remove the mounting plates from the marked locations.
- At the marked location of the tapped mounting holes, drill two holes approximately
19 mm (.75 in.) to allow clearance for the ends of the two rack-mounting bolts.
The ends of the rack-mounting bolts might protrude past the thickness of the
mounting plate. Drill one hole in each group of anchor bolt location marks
as indicated on the marked floor.
- Using at least five heavy-duty-concrete anchoring bolts for each mounting
plate, mount the mounting plates to the concrete floor.
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