Preparing a raised floor for the Earthquake Resistance Kit installation

You must prepare a raised floor as well as the concrete floor underneath before an Earthquake Resistance Kit can be installed on any of your storage units racks.

Before you begin

To ensure that you meet all site requirements, obtain the service of a qualified consultant or structural engineer to help you prepare the floor.

About this task

Figure 1 provides an illustration of the Earthquake Resistance Kit after the IBM service representative installs it for a raised floor. Before the IBM service representative installs the kit, you must prepare the area shown as  2  in the figure.
Figure 1. Earthquake Resistance Kit, as installed on a raised floor
The cut-away view showing the raised floor with the cement floor holding the eyebolt underneath.

Use the following steps to prepare your raised floor:


  1. Cut the following openings in the raised floor for each rack that uses an Earthquake Resistance Kit:
    • Four holes for the rubber bushings of the kit to fit through the floor
    • One cable cutout for power and other cables that connect to the rack

    Use Figure 2 as a guide for the location and dimensions of these openings.

    Figure 2. Locations for the cable cutouts and rubber bushing holes in the raised floor and the eyebolt installation on the concrete floor. The pattern repeats for up to five models. Dimensions are in millimeters (inches).
    Use these dimensions for cutting the holes in your raised floor and installing the eyebolts in the cement floor.
  2. Obtain four fasteners that are heavy duty concrete or slab floor eyebolts. These eyebolts are used to secure the Earthquake Resistance Kit. Work with your consultant or structural engineer to determine the correct eyebolts to use, but each eyebolt must meet the following specifications:
    • Each eyebolt must withstand 3600 lb pull force.
    • The dimensions of the eyebolt must allow the turnbuckle lower jaw of the kit to fit over the eyebolt ( 1  on Figure 3) and allow the spacer of Earthquake Resistance Kit to fit inside the eye ( 2  on Figure 3).
      Figure 3. Eyebolt required dimensions. Dimensions are in millimeters (inches).
      The eyebolt side depth must be able to fit into the lower jaw opening, which is 1.8 cm or .71 inches.  The earthquake kit spacer must be able to fit into the eybolt hole.  The spacer is 2.86 cm or 1.13 inches in diameter.
  3. Install the eyebolt fasteners in the concrete floor using the following guidelines:
    • Use Figure 2 to determine the placement of the eyebolts. The eyebolts must be installed so that they are directly below the holes that you cut in the raised floor for the rubber bushings.
    • Ensure that the installed eyebolts do not exceed a height of 101 mm (4 in.) from the floor to the center of the eye. This maximum height helps to reduce any bending of the eyebolt shaft.
    • Ensure that the installation allows the eyebolts to meet the required pull force after they are installed (3600 lb pull force for raised floor eyebolts).
    • If you use a threaded eyebolt that secures into a threaded insert in the floor, consider using a jam nut and washer on the shaft of the eyebolt. Talk to your consultant or structural engineer to determine whether a jam nut is necessary.