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Burglary resistance classification

It took many years for the representatives of the CEN member states (European Committee for Standardization) to agree on the methods of classifying the burglary resistance of construction hole products, mainly windows and doors, according to the ENV 1627 pre-standard. During the lively debates, the methods of attack used by burglars and the statistics of individual countries on this crime were taken into account. A number of studies have also been carried out, and commonly available tools have been grouped into kits for use in different classes. The problem of reproducibility and repeatability of the manual attack method was a significant problem, therefore the overall evaluation was refined by further developing the static loading tests. At the same time, manual attack was excluded from class 1. Combination of three research methods:

  • static load,
  • dynamic load,
  • hand attack,

provided an appropriate assessment procedure, including elements relevant to each class, and therefore - the type of intruder envisaged.
The different classes specified in PN-EN 1627 are intended to take into account occasional or accidental burglars, as well as more experienced and professional burglars. In principle, there are two basic groups of burglars, which are described below.
Resistance grades 1 to 3 - reflect the attack methods used by accidental or occasional burglars. Such attacks are considered to be the result of an opportunity in itself, with no particular reference to the likely benefit that a successful attack may bring. In these cases, a moderate force is used and common hand tools or balancing means are used. These burglars are likely to want to avoid noise or unnecessary risk. However, the risk comes with time, so the use of this risk per attempted access is limited and will vary with class. A similar factor is the level of resistance encountered in an attack, and the level of resistance is often a reason for failure.
Resistance classes from 4 to 6 - are associated with experienced and professional burglars, with a strong focus on achieving the assumed goal, which results from greater knowledge about the benefits of a successful attack. These projects are usually planned based on knowledge of the construction products to be forced. In this case, noise and time are of little importance. Typically, high-powered or single-use powered tools are used for the attack, often in organized crime.


Our offer includes door models that meet the RC2 and RC3 class criteria.

RC2 resistance class
An accidental burglar additionally tries to gain access with the use of simple tools, e.g. a screwdriver, pliers, a wedge, and in the case of exposed hinges, using a small handsaw. This level of burglar is not associated with mechanical drilling tools due to the use of drill-resistant cylinder inserts. The burglar seeks to seize the opportunity, has poor knowledge of the likely level of immunity, and is interested in both the time and noise issues. No specific knowledge of the likely benefits is expected and the level of risk that a burglar would like to take is low.
RC3 resistance class
The burglar tries to gain access using a steel crowbar, an additional screwdriver and tools such as a small hammer, punches and mechanical drilling tools. With the help of a steel crowbar, a burglar can apply increased forces. By using a drill, a burglar is able to attack poorly secured locking devices. The burglar seeks to seize the opportunity, has some knowledge of the likely level of immunity, and is interested in both the time and the noise. No specific knowledge of the likely benefits is expected and the level of risk a burglar would like to take is moderate.



Crystal Sp. z o.o.
ul. Bolesława Chrobrego 30
87-100 Toruń

NIP: 879-24-25-936
Regon: 871724812

tel.: +48 56 655 99 77 - Main office (Toruń)
fax: +48 56 623 81 21