Quantcast Section 5: Building Physical Security Against Forced and Covert Entry

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Section 5:
Introduction.  This section begins with a review of the threat
severity levels for forced and covert entry (par. 5.2) followed by a
description of the important elements required to achieve an effective
integrated security system design for the building to counter these threats
(par. 5.3).  Minimum prescribed Department of Defense (DoD) security
construction requirements for vaults and strongrooms; compartmental
information facilities; arms, ammunition, and explosive facilities; and
nuclear weapons and sensitive compartment information facilities are then
provided in par. 5.4 including related penetration delay times.  For cases
where the minimum prescribed designs do not provide sufficient delay relative
to guard response times, or when there are no prescribed designs for a given
facility type, the reader is referred to par. 5.5 (for new construction) or
par. 5.6 (for retrofit construction) for design options.
Threat Severity Levels for Forced and Covert Entry Design
Forced Entry.  Forced entry threat severity is defined in terms of
the relative energy level of the tools selected by an intruder to penetrate a
barrier and gain entrance to a facility.  The four basic threat severity
levels are:
Low Level - Low-observable, hand-powered tools only.
Medium Level - Unlimited hand-powered tools and limited
battery-powered tools.
Very High Level - Up to 50 pounds (23 kg) of explosives
together with unlimited hand, power, and thermal tools.
As one proceeds from the low to very high severity levels, the technical
skill or sophistication level of the threat also increases.  Examples of the
kinds of tools associated with the above threat levels are:
Hand Tools.  High-observable tools include the hammer,
sledgehammer, cutting maul, shovel, pry axe, and pick head axe.  Low-
observable tools include claw tool, carpenter's saw hacksaw, Kelly tool, bolt
cutters, pliers, spanner wrench, tin snips, wrecking and pry bar, and wire
Power Tools.  Electric- or gasoline-powered circular or
reciprocating saw with steel, diamond, carbide-tipped blade, or abrasive
wheel; hydraulic bolt cutters; chain saw; sabresaw; drill or chisel
rotohammer; rescue tools; and electric drill.


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