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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
The overall width of barbed tape is what?
3/4 of an inch
26
Barbed tape has _______ barbs spaced at ______ intervals along each side
7/16 inch barbs | 1/2 inch intervals
27
A top guard is an overhang made of what?
Barbed wire or barbed tape
28
A top guard faces in what direction?
outward and upward
29
What angle is a top guard positioned at?
45 degrees
30
How are the top guard's supporting arms attached?
Permanently affixed to the top of fence posts
31
How much do top guards increase the height of a fence?
By at least 1 foot
32
What must be installed on the supporting arms of a top guard?
3 strands of barbed wire, spaced 6 inches apart
33
Manhole covers must be secured when they are how large?
10 inches or more in diameter
34
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?
96 inches
35
A clear zone should exist between the perimeter barrier and where?
Exterior structures, parking areas, and natural or manmade features
36
How big should the clear zone be between the perimeter barrier and exterior structures / parking areas?
20 feet or more
37
A clear zone of 50 feet or more should exist between the perimeter barrier and structures within the protected areas except when?
When a building wall constitutes part of the perimeter barrier
38
It is practically impossible to build a protective barrier that cannot be penetrated by what?
a human or heavy armor
39
What are the 3 main lines of defense for physical security?
1) Perimeter barriers 2) Exterior walls, ceilings, roofs, and floors of buildings 3) Interior areas within the building
40
What is the first line of defense for physical security?
Perimeter barriers
41
Where are perimeter barriers located?
At the outer edge of the property
42
What is the second line of defense for physical security?
Exterior walls, ceilings, roofs, and floors of the buildings themselves
43
What is the most frequently used fencing for security purposes?
Chain link fencing
44
What is a major advantage of chain link security fencing?
Visibility on both sides of the perimeter barrier to police and security officer
45
What is a major disadvantage of chain-link fencing?
It creates an "institution-like atmosphere".
46
All nuts and bolts holding hardware attachments on a chain link fence should be:
welded
47
The gate in a security perimeter barrier should be how high?
As high as the adjoining barrier (fence)
48
How may a top guard on a gate be different than a top guard on a fence?
It may be vertical
49
How frequently should you have signs along the perimeter stating that the property is not open to the public and intruders will be prosecuted?
Not more than 100 ft intervals
50
If possible, ________________ should be locked from the inside.
All doors except one
51
The door not locked from the inside should be where?
On a well-lighted, police-patrolled street
52
The door not locked from the inside should be used by whom?
All employees coming and leaving work
53
Fire exit doors, required by building codes, are ___________ for security but _______ for safety.
Undesirable for security | necessary for safety
54
How are fire exit doors openable?
By pushing against a panic bar on the inside.
55
Security of a fire exit door is enhanced by the use of what?
audible alarms
56
Unusually long warehouse doors should be secured how?
Padlocked on the inside at both ends
57
What are 2 ways door hinge pins exposed to the outside can protected?
1) By spot welding | 2) By inserting a headless machine screw in a pre-drilled hole through a leaf of the hinge
58
What kinds of doors are a definite security risk?
Hollow core
59
Intruders probably won't use a window how high from the ground?
18 feet or higher
60
Windows should be secured if they are how far from trees?
14 feet
61
Windows should be secured if they are how far from adjoining buildings?
14 feet
62
Windows should be secured if they are how large?
96 square inches
63
Windows should be secured if they are how far from the ground?
18 feet
64
What are 4 protective coverings for windows?
1) Burglary-resistant glass 2) Protective iron or steel bars 3) A good grade of heavy steel mesh 4) Chain-link fencing
65
How many break-ins occur through window glass?
Over 50%
66
Who makes the burglary-resistant "safety glass"?
Underwriter's Laboratories
67
Who makes the burglary-resistant plastic glazing called TUFFAK?
Rohm and Haas
68
Who makes the burglary-resistant plastic glazing called LEXAN?
General Electric
69
Who makes the burglary-resistant acrylic-glazing material sold as Plexiglas?
Rohm and Haas
70
Special security problems are created by these 6 conditions which breach the perimeter barrier:
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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