BS EN 1303

Building hardware - cylinders for locks

UNION products applicable: DTEC cylinders

GUIDE TO CLASSIFICATION

BS EN 1303 classifies cylinders using an 8 digit coding system.

Each digit refers to a particular feature of the product measured against the standard's performance requirements.

Digit 1 - Category of use
- grade 1: for use by people with a high incentive to exercise care and with a small chance of misuse

Digit 2 - Durability
- grade 4: 25 000 cycles.
- grade 5: 50 000 cycles.
- grade 6: 100 000 cycles.

Digit 3 - Door mass
- grade 0: No requirement.

Digit 4 - Fire resistance
- grade 0: not approved for use on fire/smoke resisting door assemblies
- grade 1: suitable for use on fire/smoke resisting assemblies, subject to satisfactory assessment

Digit 5 - Safety
- grade 0: no requirement.

Digit 6 - Corrosion resistance
- grade 0: No requirement.
- grade A: high corrosion resistance; no temperature requirement
- grade B: no corrosion requirement; temperature requirement from -20°C to +80°C
- grade C: high corrosion resistance; temperature requirement from -20°C to +80°C

Digit 7 - Key related security
Six grades of key related security in accordance with the table below:

 

Grade

 

1

2

3

4

5

6

Minimum number of effective differs

100

300

15000

30000

30000

100000

Minimum number of movable levers, pins, discs, etc

2

3

5

5

6

6

Coding on key could disclose combination

Yes

Yes

No

No

No

No

Torque resistance of plug

2.5Nm

5Nm

15Nm

15Nm

15Nm

15Nm

 

Digit 8 - Attack resistance
Three grades are identified and the principal requirements are summarised in the table below:

 

Grade

 

0

1

2

Resistance to drilling (nett drilling time)

3 mins

5 mins

Resistance to chisel attack (number of blows)

30

40

Resistance to twisting attack (number of defined twists)

20

30

Resistance to plug/cylinder extraction (pull load)

15 kN

15 kN

Torque resistance of plug/cylinder

20 Nm

30 Nm

 

EXAMPLE

The following marking denotes a cylinder meeting the required category of use Grade 1, durability Grade 6 (100 000 cycles), no requirement for door mass, no fire resistance or safety in use requirement, having Grade A corrosion resistance, Grade 4 key related security and Grade 1 attack resistance.

1
6
-
0
-
A
4 1