SSG employees standing between two deployed wedge barriers.

July 2018 USACE DoD Anti-Ram Vehicle Barriers List Update

The DOD Anti-Ram Vehicle Barriers: July 2018 document adds several new barriers and adds two new aspects of defensive geometry.

  • “interpolated” designs where a barrier is tested for openings of 10′ and 20′ and is also approved for in between distances. such as 13′.
  • designs where a barrier is only able to be used for a particular engineered distance such as 20′.  This is challenging if your site doesn’t work in neat 10′ or 20′ increments.

To create this standard, the DoD employs an ASTM International performance standard and testing procedure for both active entrance barriers and passive perimeter barriers designated as “vehicle-impact rated barriers,” or “anti-ram barriers.” The current standard is ASTM F2656-07, Standard Test Method for Vehicle Crash Testing of Perimeter Barriers.

The ASTM F2656-07 test standard rates barriers in twelve impact categories, with three predetermined impact velocities for each category and four potential penetration ratings for each impact rating. These penetration ratings are: P1 – < 3.3 ft; P2 – 3.31 to 23.0 ft; P3 – 23.1 to 98.4 ft; and P4 – > 98 ft.

A few characteristics to consider are listed below (list taken from the DoD’s Protective Design Center – unlimited distribution):

  • Impact speed at barrier (low speed impact): The use of some vehicle barriers
    presented in this list exhibit vulnerabilities when impacted at speeds other than
    those associated with the ASTM and DOS test impact velocities.
  • Design Basis Threat (DBT) vehicle, other vehicle weights and speeds: The barriers
    presented in this list have been subjected to impacts under the specific conditions
    prescribed by the test designation. If the Installation’s DBT includes vehicles
    significantly different than the test vehicle, performance of the system may differ
    from what may be expected.
  • Deployment mechanisms: The mechanisms used to deploy vehicle barriers vary
    (pneumatic, hydraulic, electro-mechanical, manual). The various mechanisms
    should be investigated and the choice should be based on the best fit for the
  • Environmental condition at barrier: Environmental conditions can vary greatly
    from location to location. Conditions such as rain, snow, ice, sand, gravel, hot, and
    cold need to be considered when selecting a barrier for a specific location.
  • Operations and Maintenance (O&M) requirements: Each barrier comes with its
    own operational and maintenance requirements. The O&M requirements vary in
    the amount and intensity from barrier to barrier. O&M needs to be figured into the
    overall life cycle cost of the barrier.
  • After impact barrier gaps: Post impact gaps may be an inherent characteristic of the
    barrier system. The barrier system’s post-impact condition should be carefully
    evaluated for its cap
Crash-rated barriers at Pope AFB

Five Tips for Your Physical Security Project

Whether you are building a new high security facility or need to upgrade an facility, here are five tips to remember when planning your next physical security project:

Diversify Your Team

To deliver a successful project, develop a multi-disciplinary team that has experience with similar type projects. This team would ideally consist of facility manager, integrator, engineers, designers as well as your maintenance and security staff. Manufacturers of specialty products may be included as well. Beyond Sloan Metal Solutions, our in-house fabrication company, we also partner with a wide array of manufacturers to provide the best solutions for your physical security project.

Consider Impacts on Other Systems

You may think of your perimeter security system as a stand-alone system consisting of a security barrier and intrusion detection system, but it is important to consider how it integrates with other systems like traffic signals,  camera systems, parking systems, access control, maintenance and building security/automation systems.

Understand the Threats

Take the time to understand the nature of the threats you face and develop at least three threat scenarios that are your greatest concerns. To develop these scenarios,  utilize recent events at similar facilities, direct threats to your facilities or neighboring facilities,  industry-wide concerns, and/or local police/regulatory authority requirements.   Analyze your ability to tackle each scenario. Understand the processes from detection, assessment, response and apprehension to analyze if it will be successful or not. If industry threats have been integrated into regulations, make sure that all components have been certified to meet that threat or regulation.

Maintenance is Critical

Don’t wait until the end of the project to think about maintenance. Begin planning your maintenance budget and procedures at the beginning of the project. Different types of systems have different maintenance requirements which may require an annual cost of up to 10% of the original installation budget.

Sole Source Components

If there is a particular security component you would like to incorporate, make sure it has been used in a similar environment and demonstrated adequate performance levels. As when you hire a new employee, seek at least three references from end users who have used that specific component in a similar situation to your facility. We keep a record of our past projects, both to demonstrate our reliability and give you a general idea of security solutions that have worked under a verity of circumstances.

If you would like more information, please email or call us at 1.888.382.8379.

If you have any feedback you would like to offer on this help sheet, please email

Good luck with your project!

The Sloan Team