Views:90 Author: D&D Hardware Publish Time: 2015-12-04 Origin:Site
BS EN 1906 classifies door furniture by using an 8 digit coding system. A similar classification applies to all building hardware productStandards so that complementary items of hardware can be specified to, 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 standard's performance requirements.
1.Category of Use
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.
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 gardes 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
Two grades of fire resistance are identified:
Grade 1: Not approved for use on fire /smoke door assemblies.
Grade 2: 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 partiall glazed timber door etc .)will be contained in a separate fire test report .
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 othet staircase .
Five grades are identified according to EN 1670:
No deined Corrosion Resistance
Mild Resistance- minium requirement for internal use(24h salt spray test)
Moderate Corrosion Resistance (48h salt spray test)
High Corrosion Resistance (96h salt spray test)
Extremely High Resistance (240h salt spray test)- recommended for use in exposed marine atmosphere or very pooluted industrial environments.
Note: Products intended to devlop a natural patina(such as bronze or brass)are not required to comply with any requirements.
Five grades are identified:
Not approved for use on burglary resistant doors
Low burglary resistance
Moderate burglary resistance
High Burglary resistance
Extra High Burglary Resistance
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 removal from the outside of the door and make provision to minimise the cylinder projection to a maximum of 3mm. full details of the requirement can be found in BS EN 1960.
8.Type of operations
Three operations types are identified:
Spring assisted furniture
Spring Loaded furniture