Attaching the rack to a concrete floor beneath a raised floor

Learn more about how to attach the rack to a concrete floor, which lays beneath a raised floor.

1. Put your rack in its predetermined location.
2. If installed, remove the front and rear doors. If they are not installed, continue with the next step.
   To remove a rack door, complete the following steps:

   1. Unlock and open the door.
   2. Grasp the door firmly with both hands and lift it up away from the hinges.

   After the rack doors have been removed, go to the next step.
3. Locate the hardware mounting kit and the two mounting plates. Refer to the following illustration when reviewing the contents of the hardware mounting kit. The hardware mounting kit contains the following items:
   • 4 Rack-mounting bolts
   • 4 Thick washers [12.7 mm (½”)]
   • 4 Thick washers [6.4 mm (¼”)]
   • 4 Spacers

   

   1

   Rack-mounting bolt

   2

   Thick washer (12.7 mm)

   3

   Thick washer (6.4 mm)

   4

   Spacer

   5

   Jam nut

   6

   Leveling foot

   7

   Mounting plate

4. Position the two mounting plates in the approximate mounting location under the rack.
5. Create a rack-mounting bolt assembly by adding the following items, in the order listed, to each rack-mounting bolt.
   1. Thick washer (12.7 mm)
   2. Thick washer (6.4 mm)
   3. Spacer
6. Insert a rack-mounting bolt assembly through each of the leveling feet.
7. Reposition the rack-mounting plates under the four rack-mounting bolts so that the mounting bolts are centered directly over the threaded bolt holes.
8. Turn the rack-mounting bolts four complete turns into the mounting plate's threaded bolt holes.

   

   1

   Rack-mounting bolt

   2

   Thick washer (12.7 mm)

   3

   Thick washer (6.4 mm)

   4

   Spacer

   5

   Jam nut

   6

   Leveling foot

   7

   Mounting plate

   8

   Threaded hole (Used to secure the rack to the mounting plate.)

   9

   Anchor bolt hole

   10

   Traced pattern (Pattern to be traced onto the floor using the mounting plate as a template)

9. Mark the raised-floor panel around the edges of the front and rear rack-mounting plates.
10. Mark the plate bolt-down holes.
11. Remove the rack-mounting bolt assemblies.
12. Remove the mounting plates from the marked locations.
13. Move the rack so that it is clear of both areas that were marked on the floor for the mounting plate locations
14. Reposition the mounting plates within the marked areas.
15. Mark the floor at the center of all holes in both mounting plates, including the threaded holes.
16. Remove the two rack-mounting plates from the marked areas.
17. At the marked location of the threaded rack-mounting bolt holes, drill four clearance holes into and through the raised floor. This allows the rack-mounting bolts enough room to protrude past the thickness of the rack-mounting plates.
    Note: The quantity, location, size and type of concrete anchors must be determined by the Professional Engineer or the mechanical contractor performing the rack-mounting plate installation.

    Note: If the hole locations at the rear of the rack are not accessible, riggers will be required to install the mounting hardware in the non-accessible hole locations. You must lift the rack to install the hardware.
18. Drill pass-through holes at the selected hole locations (A) into the raised floor panels. The pass-through holes allow the mounting hardware to be inserted into the rack-mounting plate and pass through the raised floor panel to the concrete floor.

    

    Note: The quantity, location, size and type of concrete anchors must be determined by the Professional Engineer or the mechanical contractor performing the rack-mounting plate installation.
19. Transfer the locations of the anchor bolt holes (exclude the clearance holes drilled for the rack-mounting bolts) from the raised-floor panel to the concrete floor directly beneath, and mark the hole locations on the concrete floor.
20. Drill holes in the concrete floor to secure the anchor bolts.
21. If the raised-floor panels were removed, position the raised-floor panels back into position over the anchor bolt holes.
22. Position the front rack-mounting plate within the marked area on the raised-floor panel.
23. Using your anchoring method, secure the front rack-mounting plate on top of the raised floor and through to the concrete floor, but do not tighten.
24. Replace all raised panels that are required to position the rack over the front mounting plate.
25. Position the rack over the front rack-mounting plate.
26. Insert two of the rack-mounting bolts through the 12.7 mm thick washer, 6.4 mm thick washer, spacer and through each of the front leveling feet.
27. Align the two rack-mounting bolts with the two tapped holes in the front mounting plate and turn 3 to 4 rotations.
28. Position the rear-mounting plate over the holes in the raised floor.
29. Using your anchoring method, secure the rear rack-mounting plate on top of the raised floor and through to the concrete floor, but do not tighten.
30. Insert two of the rack-mounting bolts through the 12.7 mm thick washer, 6.4 mm thick washer, spacer and through each of the front leveling feet.
31. Align the two rack-mounting bolts with the two tapped holes in the rear mounting plate and turn 3 to 4 rotations.
32. Using torque requirements that are provided by the Professional Engineer or the mechanical contractor, torque the hardware that secures the front rack-mounting plate to the concrete floor.
33. Using torque requirements that are provided by the Professional Engineer or the mechanical contractor, torque the hardware that secures the rear rack-mounting plate to the concrete floor.
34. Replace all raised panels that you removed when you are aligning and securing the mounting plate hardware to the concrete floor.
35. Adjust the leveling feet downward as needed to take the load off the castors (ensure that they spin freely) and until the rack is level. When the rack is level, tighten the jam nuts against the base of the rack.

    

    1

    Rack front (base)

    2

    Leveling foot (quantity 4)

    3

    Jam nut (quantity 4)

36. If you have multiple racks that are connected in a suite (bolted to each other), go to Connecting multiple racks with rack-to-rack attachment kit for a 24-inch pitch. If you are connecting multiple racks for a 600 mm pitch, continue with Connecting multiple racks with the rack-to-rack attachment kit for a 600 mm pitch. Otherwise, torque the four bolts to 54 - 67 newton-meters (40 - 50 foot-pounds).
37. After the rack is bolted down, install the airflow plate to the front of the rack. To install the airflow plate, complete the following tasks:
    1. Position the airflow plate (1) so that it rests on the rack-mounting plate.
    2. Install two M6 x 10 flathead screws (2).
    3. Use a torque screwdriver to tighten each screw to 2.5 Nm ± 0.2 Nm (22.1 inch lb ± 1.8 lbs).

    

38. Connect the power distribution system. For instructions, see Connecting the power distribution system.
39. If you are installing rack doors, go to Attaching the rack doors.