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What is EN 1317?

What is EN 1317?

EN 1317 is a European Norm established in 1998 that defines common testing and certification procedures for road restraint systems (safety barrier). The use of CE marking coming from its part 5 is mandatory for each EU nation as from January 2011.

It's important to point out that EN 1317 does not state which barriers should be used in one or other situations, but it states which test a product should undergo to be in a certain performance class and what are the safety levels(ASI, THIV, etc..) and the classes of performance (based on different parameters).

EN 1317 defines levels of performance. Each user should evaluate, every time, which features one needs when choosing a safety barrier.


Those features are defined by the test outputs described in this norm, and they represent:

  • The performance class of the product(vehicle type tested & under what conditions)
  • The "safety level" of the product under impact (through bio-mechanical indexes it's possible to rate the probability of injuries as a result of impact with the product).
  • The space needed for its smooth operation (how much space it 'takes' during the impact, the amount of deformation after impact).

For each situation, it is generally preferable to use a system whose working width is lower than the available space (for example on the edge of a cliff), while at the same time, ensuring appropriate safety features. In the same way the containment level is chosen depending on the type of vehicle circulating on a specific road and according to the current risks (for example, falling off a bridge, entering pedestrian sidewalks or compromising the integrity of buildings).

EN 1317 is divided into different parts(as below), each of which takes care of a different aspect or a different kind of product.

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