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SAFETY & SECURITY
turned to the IWA 14-1:2013 (International Workshop Agreement) for classification, since it is a global standard that combines elements of the original (British) PAS system and the American standard ASTM. There are a number of different classifications available under the IWA system, incorporating nine different types of vehicles (including pick-ups and flat-bed trucks), different speeds from 20 mph upwards, the angle of impact – most commonly 90° – and the distance it penetrated beyond the leading edge of the device.
Martyn’s Law means that architects have a role to play in
providing well-designed protection schemes
prevent vehicles, such as those used to carry incendiary devices or to deliberately target people, from getting too close to an entrance way or to an area where people are gathering. Thankfully, help is at hand, including via ProtectUK, a police initiative launched last year to create a hub whereby business owners, security industry representatives and members of the public can stay up to date with the latest news, advice and training.
Hostile vehicle mitigation (HVM) devices Alternatively, the UK’s perimeter security products manufacturers are also able to offer advice, along with the devices which have been rigorously tested to ensure they satisfy performance and aesthetics. These are known as hostile vehicle mitigation (HVM) devices and include fencing, bollards, street planters and other often ingeniously designed products which can create a ring of steel, either as part of a new build or by fitting them retrospectively. Key to understanding their capability is understanding the PAS 68 and IWA-14 rating systems, which indicates how the products behave in test conditions in terms of the weight of the vehicle they were required to stand up against and the speed that it was travelling at.
All products are judged on their ability to withstand such collisions, including the distance that the vehicle was able to proceed beyond the point at which it came into contact with the device in question. The PAS and IWA ratings are, in essence, different, but there are many similarities and, in practice, many manufacturers have
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All of this information is included in the precise rating, which you will find on suppliers’ websites, so that, for example, a security bollard whose rating is declared as IWA 14-1:2013 V/1500(M1)/64/90:0.6 has been successfully tested against a 1.5 tonne passenger vehicle (M1) travelling at 64kph and at an angle of 90°, allowing a penetration of just 0.6 mm.
Such is the performance you can expect from a security bollard, but there is a whole range of products available with similar capabilities, including products which can be retrofitted into pavements and have shallow footings, ensuring they do not disturb underground services. And then there is security fencing which can be fitted onto bridges – which is a challenge because of the depth of footings needed to ensure the products can withstand a collision – and which can be fitted with period designs to blend in with the surroundings.
In conclusion Martyn’s Law means that architects have a role to play in providing well-designed protection schemes. But arguably, their role in this campaign goes further, because while the legislation will usher in a new era of safety, the peace of mind it will bring will be meaningless if it makes members of the public feel like they are under attack. Sensitive urban design, incorporating the latest products capable of withstanding vehicle-borne attacks, will more than play its part when Martyn’s Law comes into play by ensuring going out for a meal or a gig remains a pleasant and carefree experience while those who wish to do us harm are kept at bay.
Mark Stone is managing director at Securiscape
ADF JULY/AUGUST 2023
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