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 MIL-HDBK-419A
1.5.1.1.1.4 Raised (Computer) Flooring. Raised floors are used to structurally support equipment cabinets and
provide a space between the original facility floor and raised floor plates for cabling, air plenum or air
conditioning ducting, piping, drains, etc. Raised floors provide an esthetic room appearance. Three general
types of floor systems manufactured are: (a) the bolted-grid (stringer) or rigid grid system, (b) the drop-in grid
or removable grid type, and (c) the free-standing, stringerless or pedestal-only type. Only type (a) is acceptable
as an equipotential plane.
15-CM (6-INCH)
ID CEMENT CONDUIT
WITH RISER CAP
REINFORCEMENT
ROD
Figure 1-53. Typical Equipotential Ground Plane for New Construction
Higher or Hybrid Frequencies Facilities Installation
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