Step 1: First fix the top bushing plate on the upper part of the door leaf, then install the rotating shaft bar on the bottom of the door leaf, and install the screws on both sides. The center of the shaft hole of the top bushing plate and the center of the shaft hole of the rotary shaft must be aligned up and down, on the same center line, and perpendicular to the bottom surface of the door leaf.
Step 2: Install the top shaft on the top of the door frame. Pay attention to the distance between the center of the top shaft and the side column when installing. The door should be opened and closed flexibly.
Step 3: When installing, first hang a vertical line from the center of the top shaft to the ground and align it with the center of the ground shaft on the base. At the same time, the base level should be kept so that the gap between the upper panel of the base and the bottom of the door leaf is 15mm, and then the outer casing is filled with concrete, but the inner casing cannot be poured.
Step 4: After the concrete curing period is over, the shaft hole of the rotating shaft on the door and window is placed on the ground shaft of the base, and then the shaft hole of the top bushing plate of the door leaf is aligned with the top shaft on the door frame, and the top shaft is screwed. The lifting screw on the top allows the top shaft to be inserted into the shaft hole by 15mm, and the door leaf can be opened and closed.