Perimeter Security and Physical Barriers Flashcards

According to US Department of Defense standards, what is the minimum standoff distance from an unscreened vehicle to a critical building to mitigate blast effects from a vehicle-borne improvised explosive device (VBIED)?

Answer: 100 feet (30m)

UFC 4-010-01 (DoD Minimum Antiterrorism Standards for Buildings) establishes 100 feet (30m) as the minimum standoff distance for unscreened vehicle parking near inhabited buildings.

What is the primary purpose of a 'clear zone' (also called a buffer zone) at a facility's perimeter?

Answer: To eliminate concealment and provide unobstructed surveillance of the perimeter

A clear zone eliminates vegetation and objects that could provide concealment for intruders, improving detection capability for security personnel and electronic sensors.

Which type of fence topping provides the greatest deterrent against climbing while complying with most US local ordinances?

Answer: Razor ribbon (concertina) wire

Razor ribbon wire (concertina) provides superior anti-climb deterrence compared to barbed wire, though it must be installed in compliance with local ordinances and liability considerations.

In CPTED (Crime Prevention Through Environmental Design), what principle is applied when using low-height landscaping near building windows and entrances?

Answer: Natural surveillance

Using low-height landscaping near windows and entrances applies the natural surveillance principle by maintaining sightlines for occupants and passersby to observe criminal activity.

What is the minimum recommended fence height according to ASIS guidelines for a standard industrial security perimeter?

Answer: 7 feet (2.1m)

ASIS guidelines recommend a minimum 7-foot (2.1m) fence height for industrial security perimeters, with additional topping for higher-security applications.

Which vehicle barrier is classified as a 'passive' anti-ram barrier?

Answer: Concrete jersey barriers

Concrete jersey barriers (K-rails) are passive barriers because they are fixed in place and do not require power, activation, or operator intervention to function.