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b. Position the mounting plates under the four rack-mounting bolts so that the
mounting bolts are centered directly over the tapped holes.
c. Insert the rack-mounting bolts three or four rotations into the tapped holes.
4. Mark the floor around the edge of the mounting plates.
5. Remove the mounting bolts from the threaded holes.
6. Move the rack away from the mounting plates.
7. Mark the floor at the center of each hole in the mounting plate (including tapped
holes).
8. Remove the mounting plates from the marked locations.
9. At the marked location of the tapped mounting holes, drill two holes approximately
1 inch 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.
Note: A minimum of three anchor bolts for each mounting plate must be used to
mount 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, some of the drilled holes may not be usable. For each
mounting plate, select at least three usable holes, two that are on opposite
sides and opposite ends of each other, and one hole at the center.
Drill one hole in each group of anchor bolt location marks as indicated on the
marked floor.
10. Using at least three bolts for each mounting plate, mount the mounting plates to
the concrete floor.
11. Reposition the system rack over the mounting plates.
12. Place the four rack-mounting bolts through the plate assemblies with the D-washer
positioned so that the straight side of the washer is facing inward toward the
system rack.
13. Place the isolator bushing inside the leveling foot with a washer between the
isolator bushing and the floor plate.
14. Insert the rack-mounting bolts three or four rotations into the tapped holes.
15. Turn the leveling foot of the plate assembly down until it contacts the mounting
plate, and then level the rack using the four leveling feet.
16. Lock the leveling feet by tightening the lock nut.
17. Tighten the four rack-mounting bolts into the mounting plates.
Attaching the System Rack to a Concrete Floor Beneath a Raised Floor
The customer is responsible for obtaining the services of a mechanical contractor to
attach the rack-mounting plates on the raised floor with hardware that goes through the
raised floor into the concrete floor below the raised floor. The mechanical contractor
should determine that the raised floor support and the hardware used to attach the rack
mounting plates is sufficient to meet the customer’s requirements for the installation.
16 S80, S85 Installation Guide