1, elastic line:

According to the floor elevation horizontal line, use a ruler to vertically measure the ceiling design elevation, play the keel position line on the roof and play the ceiling elevation horizontal line on the wall.

2, install the main keel boom:

After playing the ceiling elevation horizontal line and the main keel position line, confirm the elevation of the lower end of the derrick. According to the position of the main keel and the hanging spacing, use expansion bolts to fix the bolt-free wire at the derrick 1 end under the floor; Six-meter steel bar (eight-flat steel) for suspenders.

3, install the main keel:

Install the boom nut, pre-signal the boom on the main keel, insert the assembled main keel of the boom into the corresponding boom bolt according to the position of the step line, tighten the nut, connect the main keel, install the connector, adjust the elevation and straightness of the stay wire, install additional main keel at the hole, and set the connection.

4. Install the secondary keel:

According to the played step line of the secondary keel, clamp the 3-angle crane of the secondary keel, use wooden keel, and the spacing of the secondary keel is 600; According to the main keel spacing specified in the design, the secondary keel is hung on the main keel through a 3-angle pendant; When the length of the secondary keel needs to be continuously extended for more than one time, the secondary keel shall be connected by hanging the secondary keel connector and straightened and fixed.

5. Install side aluminum bars:

The specification of side aluminum bars is 25 * 25, and the ceiling installation elevation requires that the side aluminum bars be fixed around the wall with cement nails.