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The EN 1906 standard establishes the test method requirements, at a European level, for door handles and knobs. It defines eight parameters for classifying the characteristics and performance of each product analysed. This classification therefore allows an objective comparative analysis among similar products.

The eight classification parameters are:

Each parameter is divided in turn into a scale of values (classes) identifying the degree of performance.
The classes and their meanings are:

Classification Parameters Description Class Significance of the classes
1 Category of use 1-2-3-4 see MECHANICAL PERFORMANCE
2 Lifetime resistance 6-7 6 = 100.000 test cycles
7 = 200.000 test cycles
3 Door thickness not used  
4 Fire resistance 0-1 0 = not suitable for fire-doors or smoke-doors
1 = suitable for fire-doors and smoke-doors
5 Safety (optional test) 0-1 0 = for normal use
1 = for uses with safety requirements
6 Corrosion resistance 0-1-2-3-4 0 = no corrosion resistance defined
1 = limited corrosion resistance
2 = average corrosion resistance
3 = high corrosion resistance
4 = extreme corrosion resistance
7 Break-in security 0-1-2-3-4 0 = no resistance to break-in
1 = low resistance to break-in
2 = average resistance to break-in
3 = significant resistance to break-in
4 = excellent resistance to break-in
8 Model type A-B-C A = with spring
B = with pre-loaded spring
C = without spring

PRODUCT PERFORMANCE > Mechanical performance

All ENTRA door and window handles using the quick-fit CLAQ® system are DIN EN1906 certified for the grade 3 or grade 4 category of use (the latter on customer request). Handles with the CLAQ® system are recommended for doors in high-frequency buildings and also ones subject to frequent violent usage, e.g. public places such as barracks and stadiums.

The assigned category of use (4 grades) is based on different mechanical resistance tests:

Grade 1 Medium frequency of use by people with a high incentive to exercise care and with 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 usage, e.g. football stadiums, offshore installations (oil rigs), barracks and public toilets.

The following tests are used to determine the grade of each article:

A. Rotational torque strength
20 Nm grade 1
30 Nm grade 2
40 Nm grade 3
60 Nm grade 4
B. Tensile strength
300 N grade 1
500 N grade 2
800 N grade 3
1000 N grade 4
C. Axial play
< 10 mm grade 1
< 10 mm grade 2
< 6 mm grade 3
< 6 mm grade 4
D. Free angular movement
< 10 mm grade 1
< 10 mm grade 2
< 5 mm grade 3
< 5 mm grade 4

Mechanical warranty

ENTRA guarantees the mechanical operation of all its door and window handles for a period of 10 years, far in excess of the minimum 2-year warranty established in the Italian Civil Code, providing the installation and maintenance instructions are followed carefully. All ENTRA products undergo a series of quality tests to ensure that they continue to work efficiently over time.

In order to guarantee the life and performance of its products, ENTRA door handles undergo a much higher number of operating cycles than required under DIN EN 1906. All handles are laboratory tested for over 500,000 cycles and are certified with grade 7 durability under DIN EN 1906 (200,000 cycles).

n.b. 1 cycle = 1 opening + 1 closing; 500,000 cycles = 140 daily cycles for 10 years

ENTRA window handles are tested at our own test laboratories for over 15,000 cycles, using a tilt-and-turn window as a support.

n.b. 1 cycle = 1 opening + 1 closing + 1 tilt and turn; 15,000 cycles = 4 daily cycles for 10 years