Graphical Construction Glossary >> Doors. >> Door Hinges >> Piano Hinges
The very first hinge of this type that I ever fixed was to a tool box that I made when I was about nineteen. The brass piano hinge was easy to fit, just cut to length and screw into position and yet it was very sturdy. It survived a few years of rough handling that would have wrecked the box if I had used just two or three butt hinges.
Now for something completely different. What you are looking at above is a drawing of a hinge that is designed for very hard work. In places like hospitals and hotel corridors where the doors are used incessantly for long periods and often hit by trolleys and wheeled carts or beds then these hinges come into their own.
Because of the large gap required by the hinge this one is used mainly on new work where the doors are made up to 8mm narrower to allow for this type of hinge.
The half surface hinge is mainly used for upgrading work. In the photo you can see that the face leaf has a cover plate so that the screws are concealed.
At first glance you may have thought that these hinges only open 90 degrees. Not so. As you can see the centre cover moves also giving a full 180 degree opening angle.
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