UFC 4-010-01
8 October 2003
Operations Support Vehicles. Vehicles such as airfield support equipment whose
purpose is direct support to operations and which are operated only within a restricted
access area.
Parking. Designated areas where vehicles may be left unattended.
Primary gathering building. Inhabited buildings routinely occupied by 50 or more DoD
personnel. This designation applies to the entire portion of a building that meets the
population density requirements for an inhabited building. For example, an inhabited
portion of the building that has an area within it with 50 or more personnel is a primary
gathering building for the entire inhabited portion of the building. The primary gathering
building designation also applies to expeditionary and temporary structures with similar
populations and population densities and to family housing with 13 or more family units
per building, regardless of population or population density.
Progressive collapse. A chain reaction failure of building members to an extent
disproportionate to the original localized damage. Such damage may result in upper
floors of a building collapsing onto lower floors.
Protected construction. Buried or partially buried construction that provides protection
against direct hits by large general purpose military bombs.
Roadways. Any surface intended for motorized vehicle traffic.
Routinely occupied. For the purposes of these standards, an established or
predictable pattern of activity within a building that terrorists could recognize and exploit.
Security engineering. The process of identifying practical, risk managed short and
long-term solutions to reduce and/or mitigate dynamic manmade hazards by integrating
multiple factors, including construction, equipment, manpower, and procedures.
Semi-hardened construction. Construction that provides protection against near-miss
detonations of large general purpose military bombs and direct hits from smaller
munitions.
Splinter protected construction. Construction that provides protection against
weapon fragments and small arms fire and also prevents magnification of blast pressure
from reflection off vertical surfaces.
Specific threat. Known or postulated aggressor activity focused on targeting a
particular asset.
Standoff distance. A distance maintained between a building or portion thereof and
the potential location for an explosive detonation.
Structure group. A cluster of expeditionary or temporary structures consisting of
multiple rows of individual structures with 200 or fewer DoD personnel.
A-4
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