EN12209 - Classification Code for Mechanically Operated Lock

EN 12209 is a European standard that establishes performance requirements and test methods for mechanically operated locks and locking plates in the field of architectural hardware. It sets clear testing standards and grading systems for key indicators such as durability, security, fire resistance, and smoke prevention, ensuring that products meet stringent requirements in various applications.

EN 12209:2024 classifies mechanical locks using an 8-digit coding system.

                                                                            Classification

1	2	3	4	5	6	7	8
Category of  use	Durability  and force on  latch bolt	Door mass  and closing  force	Suitability for  use on fire  resisting  and/or smoke  control doors	Safety	Corrosion  resistance and  temperature	Security  and drill  resistance	Key identification  of lever locks

Digit 1 - Category of use

Three grades are identified :

Grade 1: for use by people with a high incentive to exercise care and with a small chance of misuse, e.g.

residential doors;

Grade 2: for use by people with some incentive to exercise care but where there is some chance of

misuse, e.g. office doors;

Grade 3: for use by the public where there is little incentive to exercise care and where there is a high

chance of misuse, e.g. doors in public buildings.

Digit 2 - Durability

Indicates the expected service life of locks; with and without side force on latch bolt.

 Ten grades of durability and force on mechanically operated latch bolt are identified:

Grade	Number of cycles latch	Load on latchbolt
0	1 to 49 999	No load or for locks without latchbolt
A	50 000 to 99 999	No load or for locks without latchbolt
B	100 000 to 199 999	No load or for locks without latchbolt
C	≥ 200 000	No load or for locks without latchbolt
L	100 000 to 199 999	25 N
M	≥ 200 000	25 N
R	100 000 to 199 999	50N
S	≥ 200 000	50 N
W	100 000 to 199 999	120 N
X	≥ 200 000	120 N

Digit 3 - Door mass and closing force

Ten grades of the weight of doors and closing force to use are identified:

Grade	Door mass	Closing force
0	locks without a latch bolt	> 0 and ≤ 15 N closing force
1	up to 100 kg door mass	> 25 and ≤ 50 N closing  force
2	up to 200 kg door mass
3	above 200 kg door mass or as specified  by the manufacturer
4	up to 100 kg door mass	> 15 and ≤ 25 N closing  force
5	up to 200 kg door mass
6	above 200 kg door mass or as specified  by the manufacturer
7	up to 100 kg door mass	> 0 and ≤ 15 N closing force
8	up to 200 kg door mass
9	above 200 kg door mass or as specified  by the manufacturer

Digit 4 - Suitability for use on fire resisting and/or smoke control door set

This digit indicates if the locks are appropriate for fire-resistant and smoke control doors.. Four grades are identified:

Grade 0: not verified for use on fire resisting /smoke control door set assemblies;

Grade A: for use on smoke control door set assemblies based on a test in accordance with EN 1634-3;

Grade B: for use on smoke control and fire resisting door set assemblies based on a test in accordance with EN 1634-1 or EN 1634-2;

Grade N: for use on smoke control and fire resisting door set assemblies based on tests where the lock does not contribute to keeping the door in a closed position during the fire resisting and/or smoke control test.

Digit 5 - Safety

Only one grade of safety is identified

Grade 0: no safety requirement

NOTE   See EN 179 and EN 1125 for locks, latches and locking plates that are part of exit devices for use on emergency or panic exit doors.

Digit 6 - Corrosion resistance and temperature

This digit reflects the lock's resistance to corrosion according to EN1670 and its operational temperature range. Seven grades are identified:

Grade 0: no defined corrosion resistance; no temperature requirement;

Grade A: low corrosion resistance (24 h); no temperature requirement;

Grade B: moderate corrosion resistance (48 h); no temperature requirement;

Grade C: high corrosion resistance (96 h); no temperature requirement;

Grade D: very high corrosion resistance (240 h); no temperature requirement;

Grade F: high corrosion resistance (96 h); temperature requirement: from –10 °C to +60 °C;

Grade G: very high corrosion resistance (240 h); temperature requirement: from –10 °C to +60 °C.

Digit 7 - Security and drill resistance

This digit refers to the lock's ability to withstand forced entry attempts, with higher grades indicating greater resistance to both physical attacks and drilling, ranging from no security (Grade 0) to very high security with drill resistance (Grade 7):

Grade 0: no security characteristics

Grade 1: minimum security and no drill resistance;

Grade 2: low security and no drill resistance;

Grade 3: medium security and no drill resistance;

Grade 4: high security and no drill resistance;

Grade 5: high security with drill resistance;

Grade 6: very high security and no drill resistance;

Grade 7: very high security with drill resistance.

Digit 8 - Key identification of lever locks

Nine grades are identified:

Grade 0: no characteristics;

Grade A: minimum three detaining elements;

Grade B: minimum five detaining elements;

Grade C: minimum five detaining elements, extended number of effective differs;

Grade D: minimum six detaining elements;

Grade E: minimum six detaining elements, extended number of effective differs;

Grade F: minimum seven detaining elements;

Grade G: minimum seven detaining elements, extended number of effective differs;

Grade H: minimum eight detaining elements, extended number of effective differs.

NOTE    For non-lever locks classification “-“applies.

The DIROCK mortise locks have obtained the CE certification ( EN12209:2003). They feature exceptional durability, security, and reliability, meeting the stringent compliance requirements for public buildings and projects. For customized support and technical documentation, please feel free to contact the DIROCK team.