What a burglar-proof door should be like.
What a burglar-proof door should be like.
Burglar-proof doors
One of the most important characteristics is burglar-proof doors, that is, the ability of the entrance door to resist burglary and penetration. Based on the results of experimental testing and the necessary tests, the resistance value is determined, which determines and shows the burglar resistance of doors. In this case, all the main parameters are taken into account: overall dimensions, weight, electrical power. During the experiment, which reveals the burglar resistance of doors, the time spent on opening is calculated. When using several tools for breaking in, the resistance value of the door is determined as the product of the test time by the highest efficiency coefficient of the tool used, and the sum of the base values of all the tools used in the experiment is added to this value.
Door burglary resistance classes
In accordance with the calculations and computations performed, door burglary resistance classes are assigned. This characteristic is determined by the minimum value of door resistance from a series of tests using various instruments. Door burglary resistance classes are represented by four ranks, divided into two indicators of minimum door resistance — partial access and full access. Within each of them, a burglary resistance class is allocated. Door burglary resistance classesshow the time required to fully or partially break through a closed door. For partial access: Class 1 30 minutes; Class 2 50 minutes; Class 3 80 minutes; Class 4 120 minutes. For full access: Class 1 50 minutes; Class 2 80 minutes; Class 3 120 minutes; Class 4 180 minutes. Classes of burglar resistance of doors are determined by the minimum value of resistance when comparing different methods of breaking in and using different tools.
Burglar-proof door
Burglar-proof dooris subject to various influences from burglars who find clever ways. How to increase the degree of door resistance, what requirements should be made when buying? — Here are some tips. So, to prevent the door from being broken into by squeezing (when a crowbar is inserted between the frame and the door and the door is pushed out), you should pay close attention to the frame design: if the door fits tightly into the frame, built in a similar way, the possibility of this method of breaking in is reduced to a minimum. A burglar-proof door is opened by knocking out the lock cylinder. Therefore, it is reasonable to install several locks of different types on the door. If you burglar-proof door with a cylinder lock, you should choose a lock with an armor plate in the cylinder. Such a plate rests on the outer metal sheet of the door, and directly on the base of the lock itself. Breaking into the door by drilling out the lock can also be prevented if there is an armor plate on the lock. In the same way, breaking out and cutting the lock cylinder outward can be made unacceptable.
Protection of the entrance door
Protection of the entrance dooris also provided in other ways. It is important to consider that the door must be installed on a solid external wall made of brick, stone or concrete. If this is not possible, it is recommended to create solid internal walls. Protection of the entrance door from breaking in is achieved if the door frame has a depth equal to the depth of the wall in which it is installed. Thus, the main fastening of the opening will be removed from the wall surface, which will increase the rigidity of the frame. The protection of the entrance door is significantly increased depending on the thickness of the metal on the outside, the thickness of the sheet should be at least 1.5 mm. The door should have stiffeners, this will prevent breaking out from the corners of the door. In addition, the protection of the entrance door is increased after installing additional sheets of metal throughout the area of the locks. As for the locks, this issue should not be neglected either, for example, a coded electronic lock will be the best solution for increasing burglary resistance. You should also pay attention to the door rebate: it must be strong enough to prevent the burglar from bending the metal sheet. When installing the door, you should pay attention to the fact that the force impact on the connection of the door to the wall and the possibility of deforming the frame is minimized. Therefore, it is unacceptable to install the door on polyurethane foam, since this is an extremely unreliable type of door to wall connection.