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Use a vacuum cleaner to collect the shavings while drilling.
Use a file to remove any sharp edges or protrusions from metal parts if applicable and
3.
vacuum.
Return to the equipment area and replace the tiles, making sure the holes match, where
4.
the frames will be installed.
Insert the raised floor marking tool into the anchor holes, making sure that the tool is
5.
perpendicular with the hole.
If the hole is drilled at an angle theanchor and frame will not come together
properly. With a hammer, tap the head of the star bit with enough force to mark the
concrete floor. Repeat this step for each hole associated with all frames.
Remove the floor tiles for access to the concrete floor.
6.
Drill an 18 mm diameter hole in the concrete floor to a depth of 3 inches (7.7 cm).
7.
Use a vacuum cleaner to collect the dust while drilling any hole and clean out each hole
after the drilling is complete.
4.2.2.2 Drill Cable Holes
Mark holes and remove tiles from the equipment area, using a carbide-toothed hole saw of
the appropriate diameter. Drill any cable holes required in the raised floor tiles. Replace tiles
in the original tiles location.
4.2.2.3 Heavy Duty Frame Anchoring
This section describes how to anchor a frame on a raised floor.
If necessary, remove the tiles and finish drilling the anchor holes in the concrete using an
1.
18 mm diameter masonry bit.
Insert the anchor assembly, including the threaded rod, into the drilled holes in the
2.
concrete floor.
Install a flat washer and nut onto the anchor assembly, as shown in
3.
Lock the anchor assembly into the concrete by tightening the nut
4.
If earthquake bracing is required, perform the procedure described in
5.
Earthquake Bracing
Install a nut onto the threaded rod.
6.
The nut will need to be threaded approximately 2 inches below the top of the raised floor
Install the washers onto the threaded rod.
7.
Adjust the nut until the washer and nuts are flush with the bottom of the floor tile.
8.
before continuing.
Note:
Earthquake bracing is required in earthquake zones 3 and 4 when installing a
frame onto a raised floor with a spacing of 1.5 feet or more between the raised
floor and the subfloor.
Chapter 4
Floor Preparation
Figure 4-9
.
Raised Floor
4-9
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