EN 1627 represents the European Standard for the burglar resistant classifications of domestic and commercial doorsets, windows, curtain walling, grilles and shutters. The standard was developed by the CEN — the European Committee for Standardisation, comprised of the national standardisation bodies of 34 European countries. EN 1627 forms part of a series of European security standards (EN 1627 – EN 1630) with the aim to implement an industry-standard, minimum level of enhanced security for doorsets and windows across the EU.

The British Standard Institute (BSI) implements the standard in the UK, and the most updated version is published as BS EN 1627:2011. There are 6 resistance classifications (RC) which comprise the EN 1627 standard, and determine the level of burglar resistance offered by a security product. Classes RC1 – RC3 are primarily focused on the levels of attack associated with the casual or opportunistic intruder. It is likely such an intruder would use stealth to avoid attracting attention and utilise hand-held tools or levers to facilitate forced entry. Classes RC4 – RC6 are associated with the more experienced or professional intruder. This would include those attacks which were intentional and well-planned, with forced entry attempted with larger and/or single operator power tools.

The EN 1627 classifications are determined by meeting the specified hardware requirements alongside the level of resistance achieved in 3 type tests. The first measures resistance under static loading, and is designed to measure the overall mechanical strength of the product. The second test, dynamic loading, assesses the level of resistance to physical attacks without the use of tools, such as kicking or shoulder barging. The third test method is manual testing, which gauges the ability of a product to withstand attempts at forced entry using a selection of tools, over a stipulated period of time.

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