If the doors are removed, then you need to think about locking devices. Silent locks are laid in the canvas of steel doors. There are two ways to install such locks: investing and insert. Investing is preferred more often. To. With this method, there is no bar on the door of the door, and the vestibule iron doors, mainly their frame will not suffer from excessive holes, and will remain more strong.
Also, 2 types of locks are installed on fire -fighting metal doors: fixing – locking and locking. The latter have a special fixer tongue, and help maintain the door in a closed state. Typically, such locks are located at the bottom of doors at an altitude of approximately one meter. If there was no such castle, then it would be necessary to apply much more effort when the steel door closes. The locks are fixed with the unprvaging element. Castles located above and below doors are designed only for locking the steel door.
Accordingly, with the design, there are two types of locks for different steel doors: leaf and cylinder. Suvold (or simply safe) locks are reliable devices that can function even in the most severe circumstances (for example, after a fire). It is impossible to extract the key from his keyhole when the lock is still in the open state. The principle of operation of the system of such a lock is that the locks (suvalds) of the lock come under the influence of the grooves of the key located in the established position. If the plates of this castle do not converge with the crop, the lock will never open. If there are more than six plates in the castle, it is practically impossible to hack. Similar locks are also recommended to additionally protect against drilling. Among the flaws of this design should be distinguished: impressive key size.