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Crash Proof Barriers Against Vehicle Based Attacks

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Writer: Paul Jeffrey

The writer considers the growing need for physical protection and looks at the range of options available. Physical protection may include rising arm barriers, road blockers, sliding armoured gates plus bollards and fencing.  Often a combination of product types may be used, especially on larger sites. To stop potential Vehicle based IED attacks such barriers must be crash tested. Robust physical security measures also send out a very visual signal that can assist in deterring terrorists or indeed anyone else interested in gaining non-authorised access.

 


Physical security may require more than a single product type and instead may require a combination of several options.  With physical protection these may include rising arm barriers, road blockers, sliding armoured gates plus bollards and fencing. Often a combination of product types may be used, especially on larger sites


 


Crash testing is the only way of proving that a particular product can actually perform how it is intended to in a ‘real life’ situation and although testing obviously adds significantly to the cost of product development, it is a vital consideration



Sadly we live in a world where advances in technology and our ability to stop terrorism have been matched by a steady escalation of methods and determination of the terrorists themselves. While intelligence and surveillance will always have a vital role to play, determined, vehicle borne terrorist attacks can wreak havoc against unprotected sites or buildings.
Therefore, the more determined the terrorist attack, the more determined and comprehensive the deterrent has to be. For potentially vulnerable sites and buildings, physical protection against Vehicle Borne Improvised Explosive Device (VBIED) attacks is an essential consideration for all entrance / egress routes, perimeter access points and other vulnerable points including car parks and storage areas. The days when a manual barrier and a nearby single guard were considered an acceptable defence have long gone.

The type of site that may be vulnerable to a potential terrorist attack is increasingly broad and may include many types of public buildings, commercial sites and utilities. Each site will have its own specific requirements and also considerations such as aesthetics, site engineering (whether shallow foundations of surface mounting is required) and both robustness and longevity of any solution, plus the ease of interface with existing, or planned additional security measures such as surveillance and alarm systems.

As with other security options, suitability for each situation is a paramount consideration and physical security may require more than a single product type and instead may require a combination of several options. With physical protection these may include rising arm barriers, road blockers, sliding armoured gates plus bollards and fencing. Often a combination of product types may be used, especially on larger sites where different types of access and infrastructure may need protection. These can then be linked back into any central system and integrated with other measures as appropriate, such as certain alarms ‘locking down’ designated entrance points.

The second aspect to consider is that any products used are not only of the right type, but also of an appropriate standard. For potential VBIED attack this must mean that products have been suitably crash-tested. The most relevant standard for the Indian marketplace is the UK government developed PAS 68* standards which are similar to United States DoS K12, K8 and K4 specification – now superseded by US ASTM 2656-07.


PAS 68 crash-tested sliding and hinged security gates are designed to withstand substantial direct impact forces, such as hostile vehicle attack. The road blockers are designed for ease of installation and include options of a traditional deep blocker, a shallow foundation blocker and a surface mounted blocker, depending on the installation and risk



Crash testing is the only way of proving that a particular product can actually perform how it is intended to in a ‘real life’ situation and although testing obviously adds significantly to the cost of product development, it is a vital consideration.
Robust physical security measures also send out a very visual signal that can assist in deterring terrorists or indeed anyone else interested in gaining non-authorised access.

For areas with a high risk of terrorist or hostile attack such delivery areas, service areas or any other area that could cause mass casualty, should an incident occur, then Avon Barrier Company’s high security rising arm barriers have been proven in crash tests to PAS 68, resisting a 7,500 kg truck travelling at 30 / 50 mph. Models in this range include the EB950CR and EB1400CR.

The EB950CR Armstrong Security Barrier is proving particularly popular in India thanks to its no-nonsense robust design and cost-effective, yet high level of protection. Currently it is being installed to protect oil refineries, but is suitable for a wide range of applications. With superbly engineered construction using heavy gauge materials the barrier provides a traditional looking deterrent with a special design that means that it can be easily installed with the very minimum of civil engineering works, with shallow mounting (less than 500 mm overall depth required).

Security gates provide another measure against a determined aggressive attack and PAS 68 crash-tested sliding and hinged security gates are designed to withstand substantial direct impact forces, such as hostile vehicle attack. The SG1500CR, SG1100CR and GC1100CR PAS 68 High Impact Security Gates provide very robust heavily engineered protection for access routes, yet can also be installed without the need for extensive civil engineering works, due to their shallow footings requirement.

Road blockers are designed for ease of installation and include options of a traditional deep blocker, a shallow foundation blocker and a surface mounted blocker, depending on the installation and risk. Again all of these products have been subjected to a rigorous impact tested programme. Models include the RB780CR, the RB880CR shallow-mounted road blocker and the RB980CR Surface-mounted Road Blocker designed mainly for temporary requirements such as high security control points for conferences or military checkpoints.

For more information you can visit http://www.avon-barrier.co.uk/

Many systems are available that are either promoted or considered suitable for use as vehicle security barriers. As their characteristics differ in both function and form, a comparative means of assessing their performance is required.
PAS68 identifies impact test methods, tolerances, test vehicle type and vehicle performance criteria that need to be met in order to conform to PAS 68. Design guidance for installing barriers is provided in PAS 69:2006.


The EB950CR Armstrong Security Barrier is proving particularly popular in India thanks to its no-nonsense robust design and cost-effective, yet high level of protection. Currently it is being installed to protect oil refineries



PAS 68 cites a classification system for the performance of vehicle security barriers and their supporting foundations when subjected to a single horizontal impact.

* What is PAS 68? PAS 68 Impact test specifications for vehicle security barriers:
This Publicly Available Specification (PAS) has been prepared by the UK government to address the needs of organisations who want assurance that vehicle security barriers will provide the level of impact resistance they are aiming for.

 

 


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