Security class 4

security-class4-boltsThis model is extra high level of housing protection, in view of the high risk of burglary. It has unique patented strong metal construction which features extra rigidity and resistance.

Excellent sound insulation, fire protection also bulletproof – it’s all what you need to turn your house in safe haven.



Security class 4 – Technical information


Rating of sound insulation

45 dB Rw (C;Ctr)

Rating of thermal transmittance

1,5 W (m2-K)

Identification of burglar resistance

ENV 1627
WK4 Class 4

Resistance to repeated opening and closing

200 000 cycles

Identification of fire resistance


Bullet resistance

FB 4

Identification of resistance to wind load

Class C3

Measurement of air permeability

Class 3

Identification of water tightness

Class 1A



Structural features of resistance:

1. The armoured lock is protected by 2 drilling resistant manganese plates.
2. The bodies of the main and additional locks are installed in protective steel boxes.
3. Higher security hinges have height adjustment mechanisms. 
4. On the hinge side, there are eight 16mm diameter locking points. 
5. On the lock side, there are six locking points and 2 additional points directed upwards and downwards. A separate protective sleeve secures each lock pin in the door frame. 
6. The door leaf is of a combined structure: grating, steel sheet and grating again, so even if the outside grating was damaged, the door is still protected by the steel plate and inside grating.
7. Double thermal insulation: a 3 cm layer of rock wool on both sides of the steel sheet. It provides excellent noise and thermal insulation for the door.
8.The entire ultra strong structure of the door is covered by finishing board whose colour and design can be customized.
9. The lock pins are protected against damage not by steel sheet, but by a 15 mm thick bent profile. 
10. The frame is fixed in the opening by 17 pins, protected by steel liners of 24 mm.


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