Beneath a raised floor

Air conditioning units for computer spaces typically move air through a raised floor. A stand rated for the weight of the air conditioning unit and laterally braced to withstand seismic loads must be provided. Equipment is rigidly attached to the stand and the stand is rigidly bolted to the floor beneath the raised floor. Portions of the raised floor are removed to allow installation of the stand and equipment as shown in Figure 79.

Step 1: Determine where to bolt the equipment

Accurately draw the bolt pattern on the floor using one of the following methods:

• Set the frame in place and mark the holes.
• Make a template.
• Use measurements and construction drawings to lay out the bolt hole pattern.

Step 2: Install anchors

Set the frame in place and apply nuts to the anchor/bolt and torque.

Step 3: Move the equipment into place

Bolt equipment to the frame. You may drill additional holes into the equipment assembly or building steel beams but only as shown on construction drawings or the manufacturer’s instructions. Any holes added to the building structure must be approved by the Structural Engineer of Record.

New holes cannot be oversized or oval in shape. Repair oversized holes as shown in Figure 70, if necessary.

Piping, ductwork, and raceways may be connected.