PART A - PROTECTIVE BARRIERS.
of a post, activity, or area. They are used to restrict, channel, or impede
access. Barriers alone will not stop a determined intruder.
b. Barriers function to:
(1) Define the aforementioned physical limits.
(2) Create a physical and psychological deterrent to unlawful entry.
(3) Help the security force to capture an intruder.
(4) Use as few security persons as possible to get the job done.
(5) Direct the flow of persons and vehicles through certain gates and
facilities for identification and control.
Categories of Protective Barriers.
There are two major categories of
a. Structural barriers are devices installed to deter penetration of an
area. Examples are fences, gates, and walls. Floors, towers, and perimeter
roads and clear zones are further examples.
b. Natural barriers include terrain features. Examples are mountains,
cliffs, and canyons. Rivers, and other bodies of water, marshes, and deserts
are examples. These are barriers broad enough to deter unlawful entry. They
are supplemented with structural barriers, where required.
a. Protective physical barriers should be used to safeguard the entire
b. Certainly the size of the area may be
decision must be based on what is being protected.
Types of Fences.
There are four types of fencing normally used to
protect security areas.
These are chain link, barbed wire, concertina, and
Choice depends upon the degree of permanence of the area
Also considered are the materials and time available for
Outside perimeter fencing should be straight.
a. Chain Link. Chain link fence is the most common type of barrier at
permanent posts. There are three types of chain link fences. Type FE-5 fence
is constructed with a six-foot fabric and no top guard. This type fence