UFC 4-010-01
8 October 2003
Including change 1, 22 January 2007
methods to achieve this outcome are to maximize standoff distance, to construct
superstructures to avoid progressive collapse, and to reduce flying debris hazards.
These and related design issues are intended to be incorporated into standard design
practice in the future.
2-3
DESIGN STRATEGIES. There are several major design strategies that
are applied throughout these standards. They do not account for all of the measures
considered in these standards, but they are the most effective and economical in
protecting DoD personnel from terrorist attacks. These strategies are summarized
below.
2-3.1
Maximize Standoff Distance. The primary design strategy is to keep
terrorists as far away from inhabited DoD buildings as possible. The easiest and least
costly opportunity for achieving the appropriate levels of protection against terrorist
threats is to incorporate sufficient standoff distance into project designs. While sufficient
standoff distance is not always available to provide the standoff distances required for
conventional construction, maximizing the available standoff distance always results in
the most cost-effective solution. Maximizing standoff distance also ensures that there is
opportunity in the future to upgrade buildings to meet increased threats or to
accommodate higher levels of protection.
2-3.2
Prevent Building Collapse. Provisions relating to preventing building
collapse and building component failure are essential to effectively protecting building
occupants, especially from fatalities. Those provisions apply regardless of standoff
distance or the ability of a building to resist blast effects. Designing those provisions into
buildings during new construction or retrofitting during major renovations, repairs,
restorations, or modifications of existing buildings is the most cost effective time to do
that. In addition, structural systems that provide greater continuity and redundancy
among structural components will help limit collapse in the event of severe structural
damage from unpredictable terrorist acts.
2-3.3
Minimize Hazardous Flying Debris. In past explosive events where
there was no building collapse, a high number of injuries resulted from flying glass
fragments and debris from walls, ceilings, and fixtures (non-structural features). Flying
debris can be minimized through building design and avoidance of certain building
materials and construction techniques. The glass used in most windows breaks at very
low blast pressures, resulting in hazardous, dagger-like shards. Minimizing those
hazards through reduction in window numbers and sizes and through enhanced window
construction has a major effect on limiting mass casualties. Window and door designs
must treat glazing, frames, connections, and the structural components to which they
are attached as an integrated system. Hazardous fragments may also include
secondary debris such as those from barriers and site furnishings.
2-3.4
Provide Effective Building Layout. Effective design of building layout
and orientation can significantly reduce opportunities for terrorists to target building
occupants or injure large numbers of people.
2-2
Previous Page
