Decoding 8 digit system of EN1906 for Lever handle

What does most common seen EN1906 standard of Lever handle means?

BS EN 1906 classifies door furniture by using an 8 digit coding system.A similar classification applies to all building hardware product standards so that complementary items of hardware can be specified.For instance,a common level of corrosion resistance, category of use,etc.Each digit refers to a particular feature of the product measured against the standards' performance requirements.

1.Category of Use(D&D is Grade 4)

Four grades are identified:

Grade 1: medium frequency of use with a high incentive to exercise care and a small chance of misuse.

E.g. internal residential doors;

Grade 2: medium frequency of use by people with some incentive to exercise care but where there is some chance of misuse.

E.g. internal office doors;

Grade 3: high frequency of use by public or others with little incentive to exercise care and with a high chance of misuse.

E.g. public office doors;

Grade 4: high frequency of use on doors which are subject to frequent violent use.

E.g. football stadiums, oil rigs, barracks , public toilets, etc.

2.Durability (D&D passed test of 300,000 cycles,higher than Grade 7)

Two grades of durability are identified:

Grade 6: Medium use-100 000 test cycles

Grade 7: High use-200 000 test cycles

The test undertaken to achieve these grades involve the application of additional forces to the door furniture in order to simulate the conditions of use likely to be experienced in the field.

3.Tset door mass

No requirement

4.Fire resistance(D&D is Grade 1)

Two grades of fire resistance are identified:

Grade 0: Not approved for use on fire /smoke door assemblies.

Grade 1: Suitable for use on fire /smoke door assemblies.

Note: grade 1 classification means only that the furniture has been designed for use on fire/smoke control doors;the actual fire Performance achieved (E.g. fire integrity of 30 minutes on a partial glazed timber door etc.)will be contained in a separate fire test report.

5.Safety(D&D is Grade 1)

Two grades of safety are identified :

Grade 0：Normal use

Grade 1：Safety application-to qualify for this grade, handles must have high strength handle-to plate and plate-to handle door fixing and/or handle-to spindle fixing such that they would withstand a person grabbing in order to prevent falling.It is recommended that only safety furniture is used at the top of cellar steps or other staircase.

6.Corrosion resistance(D&D is Grade 4)

Five grades are identified according to EN 1670:

Note: Products intended to develop a natural patina(such as bronze or brass)are not required to comply with any requirements.

7.Security

Five grades are identified:

Note:The main requirement include resistance to drilling,close fitting plates or escutcheons to help protect the lock and support the cylinder.They must be resistant to remove from the outside of the door and make provision to minimize the cylinder projection to a maximum of 3mm.

8.Type of Operations(D&D type B)

Three operations types are identified:

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