We have found that many of the problems with doors and windows do not lie in the hinges or the doors and windows themselves, but a large part of them are caused by improper installation. If the decoration workers’ skills are not good enough, or even deliberately cutting corners, they will leave hidden dangers for the owners’ future use. Among them, falling fan is the most common problem. Flattening refers to poor installation of doors and windows, causing the upper gap to gradually increase and the lower gap to gradually decrease, resulting in poor opening and closing, and in severe cases, it will fall off. The main reason for choosing a hinge with a small size is that the matching screws are not used, and the screws are not even fully screwed or simply replaced by nails.
In addition, the wrong installation location and quantity also account for a large proportion. In theory, the greater the distance between the two hinges, the stronger the bearing capacity. Of course, from a practical point of view, hinges cannot be installed at the corners of the door and window sash body, so it is best to install it at 1/10 of the strength of the door and window sash body.

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