Vehicle blockers are used both to protect against moving vehicle bombs and ramraiders. Specifications for blockers vary, and their strength will depend on a number of factors, including the materials used, method of manufacture and the way in which they are mounted. Type of barrier (eg bollard, beam, rising wedge etc) is less of an indication as to stopping power.
In the US, anti-terrorism barriers should conform to the “K” rating appropriate to the design threat reference determined for a specific facility. “K” ratings are indicated in ARC Training slide, above.
In the UK, Publicly Available Specification (PAS) 68 has been prepared to address the needs of organizations who wish to have assurance that vehicle blockers will provide the level of impact resistance that they seek. The standard has been developed because of the need for a comparative means of assessing the performance of the many different types of vehicle barriers now available.
In the US, anti-terrorism barriers should conform to the “K” rating appropriate to the design threat reference determined for a specific facility. “K” ratings are indicated in ARC Training slide, above.
In the UK, Publicly Available Specification (PAS) 68 has been prepared to address the needs of organizations who wish to have assurance that vehicle blockers will provide the level of impact resistance that they seek. The standard has been developed because of the need for a comparative means of assessing the performance of the many different types of vehicle barriers now available.
PAS 68:2007 specifies a classification system for the performance of vehicle security barriers and their supporting foundations when subjected to a single horizontal impact. In the course of the standard three alternative assessment methods of determining the performance classification of vehicle security barriers are given:
* The vehicle impact method
* The pendulum method (only suitable for testing bollards at lower energy levels)
* The design method.
PAS 68 identifies impact test tolerances and vehicle performance criteria that need to be met in order to conform to it. Design guidance is provided in PAS 69:2006.
