UFC 4-022-01
25 May 2005
Containment may consist of either natural or constructed barriers. Natural barriers may
be a dense tree stand, berms, or drainage ditches on either side of the roadway. Berms
and ditches must have slopes effective at preventing vehicles from passing.
Constructed containment may include cable-reinforced fencing, concrete walls, etc.
Consider the potential debris hazard produced by passive barrier systems exposed to
blast during a potential attack and the effect on any nearby buildings or assets. The
aesthetics and design of the barrier system should be consistent with the installation's
exterior architectural plan and the surrounding architectural and landscape features.
Breaks in the passive barrier system for pedestrian access to the ECF should not
exceed 3.3 feet (1 m) in width for traffic having a 90-degree approach and 4.1 ft (1.25
m) in width for traffic paralleling the barrier.
Air Force guidance suggests that higher curbs, a minimum of 18 in (457mm)
AF
high, are a low-cost means to prevent motorists from leaving a road to bypass security
or to access a sensitive area of the installation.
6-3.2
Final Denial Barrier
The purpose of the final denial barrier is to stop unauthorized vehicles from entering the
installation. Some individuals who attempt to enter the installation without authorization
are lost, confused, or inattentive, but there are also those whose intent is to "run the
gate." A properly designed final denial barrier will take into account both groups,
minimizing the risk to individuals who have made an honest mistake and providing a
properly designed barrier (based on the specified threat) to stop those with hostile
intentions.
Final denial barriers are active vehicle barriers. ECFs should be provided with final
denial barriers to enable the ECF to be closed and to prevent a threat vehicle from
breeching the security. As discussed in 6-2.3.1, determination of the location of the final
denial barriers depends on the response time required between the detection of threat
and the deployment of the final denial barriers. Provide final denial barriers in the
incoming and outgoing lanes in order to prevent threat vehicles from using the outgoing
lanes to gain access to the installation (Securing U.S. Army Site Access Points).
Provide active barrier systems with a normal operating mode that moves the barrier
between open and closed positions at a relatively slow pace. In addition the barrier
should have an emergency activation or emergency fast operation (EFO) mode, which
deploys the barrier at an accelerated, shortened time in the event of an attack or threat.
In all cases an alarm signal must be transmitted to the installation central security
monitoring facility indicating an emergency activation of the active vehicle barriers.
6-3.2.1 Design and Safety Considerations
Ensure that vehicle barriers are planned and constructed in accordance with UFC 4-
022-02 including all necessary safety measures. Safety devices associated with active
vehicle barriers are covered in UFGS 02840 Active Vehicle Barriers. The design and
operation of the ECF should include provisions to protect innocent users of the ECF
from operation of the final denial barrier whether deployment is accidental, during a test,
6-10
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