Any modern entrance door consists of a sturdy frame that has a rectangular shape. To stiffen the frame, special ribs made of a metal profile are used. The number of ribs required for the frame directly depends on the size of the door leaf. Metal sheets are welded onto the frame. The use of double-sided cladding makes it possible to protect the entrance door from possible distortions. An additional sheet of metal also allows you to protect your front door from burglary.
In the manufacture of high-quality metal doors, experts recommend using steel with a minimum thickness of 3 mm, in order for the door to be considered armored, solid sheets of steel with a thickness of 6 mm must be used in its manufacture. Steel doors are made of 7 mm thick sheet steel, which gives them the necessary strength. Foreign door manufacturing companies often use thin sheets of metal, the thickness of which is about 2-3 mm. Domestic manufacturers use metal with a thickness of 3-4 mm. It turns out that the doors of domestic production will be stronger than their foreign counterparts.
In the manufacture of armored doors, it is necessary to use special hinges. Hinges for armored doors can be of two types. An ordinary loop is a pin that is the axis of rotation of another part of the loop. This type of loops has become the most widespread. In the manufacture of economy doors, this type of hinges is also used. However, this type of loop has its disadvantages, with constant operation, the support surface of the loop is erased, which in the future may lead to improper operation of the entire loop element. The first signs that the hinge has worn through are sagging and jamming of the door. That is why a suitable option for modern entrance doors is the hinges of the second option. In the mechanism of this loop, there is a support bearing, thanks to which the door will not fasten when opening. However, this type of loop also has a disadvantage, it must be constantly lubricated. The number of hinges required for installation on the door depends on the size of the door leaf and its weight. A standard-sized metal door weighs about 70 kg, two hinges will be quite enough for such a door. If, after all, the weight of your door is greater, then additional hinges must be installed. Aviator game download
