UFC 4-021-02NF
27 September 2006
change 1, 23 October 2006
change, and rain drainage are some factors to consider in exterior sensor selection.
Refer to the Perimeter Security Sensor Technologies Handbook for more information on
exterior IDS sensors.
When fence detection sensors are used, the best application is to use a double-fence
concept. In addition to adding an additional delay factor, the outer fence acts as an
animal deterrent, while the detection system is best applied to the inner fence. Typically
the fence should be a climb-resistant fence at least eight feet high with a minimum of
eight feet of distance between the inner and outer fence, as shown in Figure 5-12. Use
of concrete footings down to one foot below the surface helps limit mitigation by shallow
tunneling.
Figure 5-12. Fence Example
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