Views:50 Author: D&D Hardware Publish Time: 2015-12-04 Origin:Site
1.Category of use
Four grades are identified:
Grade 1 : Low frequency of use by people 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 change of misuse.
Twelve grades are identified with minimum figures for deadbolt and snib operation, and latch bolt operation with and without side load, as show. The side load is applied to the latch bolt when it is being withdrawn.
No of operations
|Incesting Side Load|
|grade C||grade H||grade M||grade S||grade X|
|grade B||grade G||grade L||grade R||grade W|
|grade A||grade F|
Nine grades are identified with maximum figure for closing force at various door masses as shown. Note :losing force is form a standing. Star :i.e.fully extended latch bolt in contact with striking plate at star of test .
|Maximun closing||Up to 100kg||Door mass up to 200kg||Above 200kg|
|15N||grade 7||grade 8||grade 9|
|25N||grade 4||grade 5||grade 6|
|50N||grade 1||grade 2||grade 3|
Two grade are identified :
Grade 0 : Not approved for use on fire/smke door assemblies
Grade 1 : Suitable for use on fire/smoke door assemblies tested to BS EN 1634-1 etc.
Note 1. A grade 1 classification means only that the lock has been designed for use on fire/smoke control doors; the actual fire performance achieved(e.g.fire integrity of 30minutes on a partially glazed timber door etc.)will be contained in a separate fire test report.
Note 2. Where a product is intended for fire/somke door use (i.e.a."1" in box 4 ), it must be possible to demonstrate compliance with the Essential Requirements of the Construction Products (Amendments)Regulation. It is recommended that the product should bear the CE mark(see section on CE marking) .
No requirement, but note : a lock or latch conforming to this standard can, at the same time, also be part of an exit device conforming to BS EN 179 or BS EN 1125.
Eight grade are identified with neutral salt-spray (NSS)corrosion resistance grades from BS EN 1670:1988, with and without Temperaturere resistance as shown :
|Corrision resistance (NSS)||Temperature resistance|
|No requirement||-20c to +80C|
|240 hours||grade D||grade G|
|96 hours||grade C||grade F|
|48 hours||grade B||grade E|
|24 hours||grade A|
|No requirement||grade O|
8. Field of door application.
Fifteen grades are identified for differing applications-hinged or sliding doors with rim or mortice locks with either keyless egress from inside or key locking from both sides.The grading determine which application is apporopriate.in addition, there there is a requirement that lock/latch should not be removable from outside or, for grades K to R, from inside using "standard" tools. Grades H and P require support for the lockcase when installed.
9.Type of Key operation and locking.
Nine grades are identified for differing types of key operation, The grading determines how the lock is assessed foe deadlocking requirement as shown. In addition, there is a maximum key torque operating requirement of 1.5 Nm and a minimum key strength requirement of 2.5 Nm .
Grade 0 : Not applicable;
Grade A : Cylinder lock or latch; manually locking;
Grade B : Cylinder lock or latch; automatically Locking;
Grade C : Cylinder lock or latch; manually locking with intermediate locking;
Grade D : Lever lock or latch; manually locking;
Grade E : Lever lock or latch; automatically locking;
Grade F : Lever lock or latch; manually locking with intermediate locking;
Grade H : Lock or latch without key opreation;manually locking;
Grade G : Lock without key operation; automatically locking.
10. Type of spindle operation
Five grades are identified
Grade 0 : Lock without follower
Grade 1 : Lock with sprung lever or knob
Grade 2 : Lock with light unsprung leverg.
Grade 3 : Lock with heavy unsprung lever
Grade 4 : Lock with manufacturer's own specification furniture
11. Key identification
Nine grades are identified relating to the number of differs and levers.Grades to a latch with no locking action.
|No of differs||No of levers|
BS EN 1634 Part 1: 2000
Is the European Fire Safety Satandard for determining the fire resistance of door and shutter assemblies including hardware designed for installations within openings incorporated in vertical seprating elements (doorsets).
The UK construction Products Regulations require locks for use on fire doors to be safe and durable. British/European standards BS EN 12209 is the recognised way of demonstrating compliance and requires that an official Notified Body proves both the product and the manufaturer's factory product controls are satisfactory before CE marking can be applied. It is recommended that locks fitted to Fire doors should be CE marked.
CE marking is the easiest and safest route to providing compliance with the latest UK Construction Products Regulations for hardware used on fire, smoke and escape doors.
BS8300 & Approved Document "M" of the Building Regulations
These documents recommend that locks should have a minimum of a 55mm backset and that the centres should be a minimum of a 72mm. Locks with keyways above the cylinder are also suitable.
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