Marba-LEA202.pptx physical barriers 1st yr crim

LEA202

1. Physical Barriers A barrier is a natural or manufactured obstacle to the movement of persons, animals, vehicles, or materials. It defines physical limits to and delays or prevents penetration of an area (POA Publishing LLC, 2003). It is impossible to build a barrier that cannot be compromised. A clever and determined intruder with plenty of time, money and imagination can quite possibly penetrate any structural barrier. Hence, intelligently designing layers of barriers is considered an effective measure to ensure physical security. The idea is to cause as much delay as possible by designing a series of layers, or concentric circles, so that highly protected assets are within a configuration of multiple barriers.

2. A concentric protection of a high-security facility allows for several rings of barriers, as explained by John J. Fay in his book Contemporary Security Management: “ The overall security scheme features several rings of security that in the abstract look like a shooting target.The outermost ring, which is at or on the far edge of the perimeter, might be a clear zone in which the approach of an intruder or intruder force can be seen by human and/ or electronic means. The next ring might be a wall or fence, and then another wall or fence. Supplementing the walls or fences might be guard posts, patrols, detection sensors,CCTV cameras, and security lighting. The next ring might be sentry-protected and electronically controlled doors to a building or a complex of buildings.Within the building might be another ring of security consisting of access-controlled exclusion areas, and yet another ring within the exclusion areas might consist of safes, vaults, and similar containers, inside of which might be motion-detection devices. The theory operates on the simple premise that an attempted intrusion will have a lesser chance of success when multiple layers of protection stand in the way." (Fay, 2006)

3. Advantages of Physical Barriers Physical barriers become a psychological deterrence when a potential intruder is discouraged from accessing a facility because the barriers appear to present difficulties . Actual difficulty in getting through physical barriers. Reducing the cost of security staffing by substituting barriers for people and placing security posts in locations that complement barriers.

4. Purpose of Physical Barriers To control the movement of people and vehicles into, out of, and within the facility. To segregate or compartmentalize sensitive areas. To provide physical protection to objects, materials, and processes of critical nature.

5. General Types of Physical Barriers Natural Barriers include bodies of water, mountains, marshes, ravines, deserts, or other terrain that are difficult to cross.

6. 2.) Structural Barriers are man-made barriers such as fences, walls, floors, roofs, grills, bars, roadblocks, or other physical means. A structural barrier physically and psychologically deters or discourages the undetermined, delays the determined and channels the flow of authorized traffic through entrances.

7. Other Types of Physical Barriers 1. ) Human Barriers The guard force as a human barrier is the key element in any security system. Without it, all other protective devices - mechanical, electrical or electronic - would be useless. The electric device may sound the alarm, the CCTV may spot the culprit, or the micro-computer may trigger a red button as a sign of intrusion, but it is the guard who will respond and initiate the needed security action.

8. 2. ) Animal Barriers The most common of animal barriers are dogs known as the K-9 team. The number of dogs to be used relies on the size and kind of installation being secured. The most popular breed is the German shepherd. If trained correctly, the K-9 can detect even hidden drugs and firearms, thus, their prevalent use in sensitive entrances like airports, malls and public transport such as the MRT. Among rural residences, another effective animal barrier is the goose barrier. It is common knowledge that geese are not as ferocious as dogs, but they can easily call the attention of their owners at the first sign of a would-be intruder through their loud hissing sound.