Use this procedure to attach the rack to a concrete (nonraised) floor.
Attention: It is the customer's responsibility to ensure
the following steps are completed before the service representative performs
the tie-down procedure.
Note: The customer should 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 may 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).
- Place the mounting plates (item 1 in Figure 1), 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 Figure 1)
through the plate assembly holes at the bottom of the rack. Install the bushings
and washers (item 4 and 5 in Figure 1) 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 Figure 1) under the four rack-mounting bolts (item 6 in Figure 1) so that the mounting bolts are centered directly over the tapped holes.
- Turn the rack-mounting bolts (item 6 in Figure 1) three or four rotations into the tapped holes.
- Place the four rack-mounting bolts (item 6 in Figure 1)
through the plate assembly holes at the bottom of the rack. Install the bushings
and washers (item 4 and 5 in Figure 1) to
ensure bolt positioning.
- 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 may 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.
