🟧 hinges
Hinge plays the most important role in fittings. Because the hinges support the entire weight of the opening hinge, which is between 30 and 70 kg on average, and if standard hinges are not used, the probability of the hinge breaking is very high and will cause financial and even life losses. It is mandatory to use adjustable hinges instead of 70 and 100 mm hinges in the construction of doors and windows, because these types of hinges (adjustable hinges) will be able to bear the weight of 130 kg easily.
🟧 Handle
In choosing a good handle as one of the main fittings for double-paned doors and windows, the length of the handle lever is a point that should be taken into account. The length of the handle lever causes less pressure on the handle and spaniel and makes it easier to open and close the door and window. Also, using a handle with a solid lever makes it work better.
🟧 Lock
One of the most important parts in double-glazed door and window fittings is the lock. Failure to use a suitable and standard alloy in the manufacture of this part causes the gears to fail and increase the pressure on the handles, as well as the locking spring (spaniolet) not moving, and as a result, the door and window fail.