1, open two whatevers on the left and right: stand outside the door, open the door on the left with the hinge on the left, and open the door on the right with the hinge on the right.
2. When people stand outside the door, use the left hinge when the lock is installed on the left and the right hinge when the door lock is installed on the right.
3. Hinge, also called hinge, is officially called hinge. It is a component that connects two parts of an object and makes it move. Ordinary hinges are used for cupboard doors, windows, doors, etc.
Extended Information: Precautions for Door Hinge Installation:
(1) Before installation, check whether the hinge matches the door frame and sash.
(2) Check whether the hinge groove matches the height, width and thickness of the hinge.
(3) Check whether the screws and fasteners connected with the hinge match.
(4) The connection mode of the hinge should match the materials of the frame and the fan. For example, the hinge for a wooden door with a steel frame, the side connected with the steel frame is welded, and the side connected with the wooden door is fixed with wooden screws.
(5) In the case of asymmetric two hinges, it is necessary to distinguish which one should be connected to the fan and which one should be connected to the door and window frame. One side connected to the third shaft should be fixed to the frame, and the other side connected to the second shaft should be fixed to the door and window.
(6) When installing, ensure that the hinges on the same fan are on the same vertical line to prevent the door and window fans from bouncing.