Section 5: VEHICLE BARRIER SELECTION PROCESS
General. This section presents a recommended process for selecting a vehicle barrier
for a facility that could be subject to damage from an explosive-laden vehicle attempting to
penetrate the perimeter. This process is applicable to either new construction or retrofit of an
existing facility. The discussions that follow are keyed to the standoff distance and vehicle
barrier selection flowcharts (Figures 1 and 2).
Standoff Distance Selection Process. The approach for this process is to: (1) establish
input factors required to evaluate site conditions, (2) perform the required analysis, and (3) make
major YES or NO decisions. The process is repeated until the objective (final vehicle barrier
design to protect against the identified threat) has been achieved.
Initial Considerations. At the beginning of the vehicle barrier selection process (see
Start on Figure 1), four factors determine if an existing or planned facility has acceptable
standoff distance available. These factors are:
a) In Step 1 of Figure 1, select the level of protection appropriate for the facility
being analyzed in terms of acceptable damage and injury levels. This is determined using Tables
D-5, D-6, and D-7 in Appendix D.
b. In Step 2 of Figure 1, determine the size of the expected explosive charge from
established r)equirements or expected threat information from the intelligence community.
c) In Step 3 of Figure 1, determine the standoff distance requirement. This is based
on the established explosive threat and the distance required to meet acceptable damage and
injury levels from Tables D-5, D-6, D-8, and D-9 in Appendix D.
d) In Step 4 of Figure 1, use the input from Step 3 to determine if the site will
provide sufficient standoff distance to ensure acceptable damage and injury levels.