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Physical Security > Barriers > Flashcards

Barriers Flashcards

1
Q

What are the 2 major types of protective barriers?

A

1) Structural

2) Natural

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2
Q

What are the 3 basic purposes of barriers?

A

1) Deter / delay
2) Psychological deterrent
3) Supplement/complement security personnel needs

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3
Q

What should positive barriers be established for?
1)
2)
3)

A

1) Controlling car/foot traffic flow
2) Checking ID of personnel entering/leaving
3) Defining a buffer zone for more highly classified areas

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4
Q

When the greatest degree of security is essential, what should be installed on the perimeter?

A

Two lines of structural barriers

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5
Q

Two lines of structural barriers should be separated by not less than ________ feet and no more than __________ feet for best protection and control.

A

15 feet

150 feet

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6
Q

Four types of fencing authorized for use in protecting restricted areas are?

A

1) Chain link
2) Barbed wire
3) Concertina
4) Barbed tape

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7
Q

Chain link fences must be how high, excluding top guard?

A

7 feet

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8
Q

Chain link fences must be what gauge or heavier?

A

9 gauge

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9
Q

Chain link fences must have what size mesh openings?

A

2 inches per side or smaller

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10
Q

Chain link fences should have what at the top and bottom?

A

Twisted and barbed salvage

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11
Q

How must chain link fences be fastened?

A

To rigid metal or reinforced concrete posts set in concrete

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12
Q

On hard ground or paving, chain link fences must come how close to the ground?

A

Within 2 inches

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13
Q

On soft ground, chain link fences must reach below the surface deep enough to what?

A

Compensate for shifting soil or sand

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14
Q

Standard barbed wire is what kind of strand and what gauge?

A

Twisted, double strand, 12 gauge

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15
Q

How many points on barbs on barbed wire fences?

A

4

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16
Q

Barbs on barbed wire fences should be spaced how?

A

Equally apart

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17
Q

Barbed wire fencing should be at least how high, excluding top guard?

A

7 feet

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18
Q

Barbed wire fencing must be firmly affixed to posts not more than how many feet apart?

A

6

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19
Q

On barbed wire fencing, the distance between strands will not exceed how many inches?

A

6

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20
Q

On barbed wire fencing, one wire will be interlaced how?

A

Vertically and midway between posts

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21
Q

Commercially manufactured wire coil of high-strength steel barbed wire clipped together at intervals to form a cylinder is called:

A

concertina barbed wire

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22
Q

Opened concertina wire is ____ feet long and ____ feet in diamater

A

50, 3

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23
Q

The barbed tape system is composed of 3 things:

A

1) Barbed wire
2) Barbed tape dispenser
3) Concertina tape

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24
Q

Barbed tape is fabricated from a steel strip with a minimum breaking system of how many pounds?

A

500

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25
Q

The overall width of barbed tape is what?

A

3/4 of an inch

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26
Q

Barbed tape has _______ barbs spaced at ______ intervals along each side

A

7/16 inch barbs

1/2 inch intervals

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27
Q

A top guard is an overhang made of what?

A

Barbed wire or barbed tape

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28
Q

A top guard faces in what direction?

A

outward and upward

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29
Q

What angle is a top guard positioned at?

A

45 degrees

30
Q

How are the top guard’s supporting arms attached?

A

Permanently affixed to the top of fence posts

31
Q

How much do top guards increase the height of a fence?

A

By at least 1 foot

32
Q

What must be installed on the supporting arms of a top guard?

A

3 strands of barbed wire, spaced 6 inches apart

33
Q

Manhole covers must be secured when they are how large?

A

10 inches or more in diameter

34
Q

Unavoidable drainage ditches, culverts, vents, ducts, and other openings having a cross-sectional area of what size must be protected by securely fastened welded bar grills?

A

96 inches

35
Q

A clear zone should exist between the perimeter barrier and where?

A

Exterior structures, parking areas, and natural or manmade features

36
Q

How big should the clear zone be between the perimeter barrier and exterior structures / parking areas?

A

20 feet or more

37
Q

A clear zone of 50 feet or more should exist between the perimeter barrier and structures within the protected areas except when?

A

When a building wall constitutes part of the perimeter barrier

38
Q

It is practically impossible to build a protective barrier that cannot be penetrated by what?

A

a human or heavy armor

39
Q

What are the 3 main lines of defense for physical security?

A

1) Perimeter barriers
2) Exterior walls, ceilings, roofs, and floors of buildings
3) Interior areas within the building

40
Q

What is the first line of defense for physical security?

A

Perimeter barriers

41
Q

Where are perimeter barriers located?

A

At the outer edge of the property

42
Q

What is the second line of defense for physical security?

A

Exterior walls, ceilings, roofs, and floors of the buildings themselves

43
Q

What is the most frequently used fencing for security purposes?

A

Chain link fencing

44
Q

What is a major advantage of chain link security fencing?

A

Visibility on both sides of the perimeter barrier to police and security officer

45
Q

What is a major disadvantage of chain-link fencing?

A

It creates an “institution-like atmosphere”.

46
Q

All nuts and bolts holding hardware attachments on a chain link fence should be:

A

welded

47
Q

The gate in a security perimeter barrier should be how high?

A

As high as the adjoining barrier (fence)

48
Q

How may a top guard on a gate be different than a top guard on a fence?

A

It may be vertical

49
Q

How frequently should you have signs along the perimeter stating that the property is not open to the public and intruders will be prosecuted?

A

Not more than 100 ft intervals

50
Q

If possible, ________________ should be locked from the inside.

A

All doors except one

51
Q

The door not locked from the inside should be where?

A

On a well-lighted, police-patrolled street

52
Q

The door not locked from the inside should be used by whom?

A

All employees coming and leaving work

53
Q

Fire exit doors, required by building codes, are ___________ for security but _______ for safety.

A

Undesirable for security

necessary for safety

54
Q

How are fire exit doors openable?

A

By pushing against a panic bar on the inside.

55
Q

Security of a fire exit door is enhanced by the use of what?

A

audible alarms

56
Q

Unusually long warehouse doors should be secured how?

A

Padlocked on the inside at both ends

57
Q

What are 2 ways door hinge pins exposed to the outside can protected?

A

1) By spot welding

2) By inserting a headless machine screw in a pre-drilled hole through a leaf of the hinge

58
Q

What kinds of doors are a definite security risk?

A

Hollow core

59
Q

Intruders probably won’t use a window how high from the ground?

A

18 feet or higher

60
Q

Windows should be secured if they are how far from trees?

A

14 feet

61
Q

Windows should be secured if they are how far from adjoining buildings?

A

14 feet

62
Q

Windows should be secured if they are how large?

A

96 square inches

63
Q

Windows should be secured if they are how far from the ground?

A

18 feet

64
Q

What are 4 protective coverings for windows?

A

1) Burglary-resistant glass
2) Protective iron or steel bars
3) A good grade of heavy steel mesh
4) Chain-link fencing

65
Q

How many break-ins occur through window glass?

A

Over 50%

66
Q

Who makes the burglary-resistant “safety glass”?

A

Underwriter’s Laboratories

67
Q

Who makes the burglary-resistant plastic glazing called TUFFAK?

A

Rohm and Haas

68
Q

Who makes the burglary-resistant plastic glazing called LEXAN?

A

General Electric

69
Q

Who makes the burglary-resistant acrylic-glazing material sold as Plexiglas?

A

Rohm and Haas

70
Q

Special security problems are created by these 6 conditions which breach the perimeter barrier:

A

1) Sidewalk elevators
2) Utility tunnels
3) Operational tunnels
4) Storm sewers
5) Storm doors
6) Piers, docks, and wharves

Physical Security (10 decks)

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