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Until 2011, the standard ENV 1627: 1999 was valid which however then was replaced with the Standard EN 1627: 2011. The Standard applies to doors, windows and curtain walls and defines the resistance classes, resistance time (the time period in which a product can resist a break-in), types of offenders and the procedure. Since September 2011, the resistance classes have not been denoted by "WK" anymore (German: Widerstandsklasse) but instead by "RC" (resistance class). The new resistance classes RC1N and RC2N were also introduced which can only be equipped with standard glass.


When testing the windows and doors, it is mainly ensured that there is no weak point in the total construction (frame, armature, glazing, door leaf, edge, lock).

Resistance Class: Security Door Plates DIN 18257 Lock Cylinder DIN 18252 Glazing DIN EN 356 Test Cert Perpetrator and method Manual Test Time DIN V ENV 1630:
DIN V EN V 1630:
RC1 ES 1 P2 BZ Composite glass recommended Not required Vandalism:
Kicking, pressing, jumping against. Little protection against levering
RC2 ES 1 P2 BZ P4 A Required Opportunist:
Bodily force, simple tools e.g. screwdriver, shim, pliers
3 - 15 mins
RC3 ES 2 P2 BZ P5 A Required Opportunist:
With add’l second screwdriver and crowbar
5 - 20 mins
RC4 ES 3 P3 BZ P6 B Required Experienced perpetrator:
Add’l use of saw and tools such as axe and chisel, hammer, electric drill

10 - 30 mins
RC5 Individual test Individual test P7 B Required Experienced perpetrator:
Add’l use of electric tools, such as drill, jigsaw or saber saw
15 - 40 mins
RC6 Individual test Individual test P8 B Required Experienced perpetrator:
Add’l use of more powerful electric tools than WK5
20 - 50 mins

When burglar resistance is required, the following should be noted:

Strengthened glass is not tested in accordance with DIN EN 1627, the standard for burglar resistance - but in accordance with DIN EN 356, for so-called breakthrough resistance.

Breakthrough resistance is principally tested using an axe, to check if an attacker (within a stipulated timeframe) succeeds in creating an opening 50 x 50cm, through which he can enter the building.

There is a discrepancy in both standards, if burglar resistance and breakthrough resistance are mixed together, as is the case with glazed doors and windows.

When burglar resistant doors and windows, with high classifications RC5 and RC6, are tested, an angle grinder is also used, but this is not the case when testing glass for breakthrough resistance. When an angle grinder is used on strengthened glass, a thief can cut an opening in a few minutes, through which he can enter.

When glazed doors and windows are to be supplied in accordance with burglar resistance RC5 and RC6, the glazing is a real weak point which does not correspond to the requirement for burglar resistance at this level.

There is also a weak point in the lower classifications in relation to burglar protection for glazed units:

The break-in test assumes that the building is entered by making a hole. However, on doors it is much quicker to make a small opening in the glass, in order to reach through with a tool or one's hand and open the door using the handle on the inside.

This is why burglar resistant casement windows and glazed doors are equipped with lockable handles. Doors always have to be locked, and the keys must not be left in the lock inside.

When the burglar resistant doors have an emergency exit and panic function, the door opener also always opens the door lock. For this reason, glazing on doors to the required test classification is not sufficient. The door opener can easily be activated (see photo) through the hole in the glazing - the door opens - and the resistance classification is not met.

Emergency doors and panic doors therefore require special glazing (polycarbonate glass), to prevent this type of attack.

Please ask us if you have any questions.