For experts, this article can be like the alphabetical truth. But for citizens a few words about the device of the front door will not hurt. So what is a standard metal door? First of all, it consists of two sheets of metal. The metal is fastened to each other. And helps them in this frame. Between the sheets, stiffness ribs are installed. Have them both horizontal and in vertical position. The cavity between the sheets is filled with a special material so that good heat and sound insulation are observed.
The chip of the metal door has locks, and there is also the presence of a crossbar system. Rigel system is called metal pins or crossbars that are needed when locking the door. It is at this moment that they move from the ends of the door.
Initially, this method was applicable in bank safes, and gradually found the use of door manufacturers. Rigels can be observed on two or four sides. They usually use rotating crossbars for difficult to cut them in case of fraud.
What a metal door is on / by, such a box. It should also be hacking, and with strength to maintain the weight category of the door itself. If we talk about beyond reliable metal doors, then their weight can reach 150 and above kilograms. For light metal doors, weight-50 kg is the most optimal.
Powerful pins protect against scammers so that they could not break the entire box from the opening. The pins are clogged deep into the walls. The loops are also special here, they are not like the loops that are placed on the wooden doors. If we talk about castles, then the most common, these are legged and cylinder locks. This is not to say that they have no advantages and disadvantages, and each prevails over the other.
Swald locks have characteristics such as: massiveness and strength. But there is no secrecy in them. The cylinder locks, on the contrary, have about 360 million combinations of intravity, but they are not strong. Therefore, experts believe that two types of locks are needed at once on the door. The secrecy of the cylinder castle lies in the cylinder, the larva itself. Many manufacturers are now better to make locks typical for one cylinder. It is called Eurocilinder. Therefore, now without difficulty, with the help of a conventional screwdriver, you can not take out the castle itself, replace the core itself. Even any housewife can do this.
