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After the woodworker enters the market, it is necessary to copy and level the payline. When the top corner line is installed, the horizontal line should be popped first. The seam pattern should be aligned and the yin and yang angle should be 45 degrees.

According to the ceiling design elevation must be on the wall around the line, allowing the deviation of 5mm; ceiling wood keel should adopt non-distorted red and white pine, not allowed to use pine wood. The main keel of a large area of ​​indoor ceiling should be 50mm × 70mm, spacing is 900-1100mm, sub-keel 50mm × 50mm or 40mm × 60mm, sub-keel spacing is generally 400-500mm; large area ceiling should be short span to the room 1/200 arches; 25x30mm wood dragon skeletons are used for the ceilings of smaller areas, and the skeleton interface is fixed with round nails and glue. Reliance on the wall wood keel should have anti-corrosion measures, such as manholes and other holes need to strengthen the keel.

It is forbidden to fix the plasterboard with a gun. When the gypsum board is installed, the screws should be trapped 0.5-1mm above the board surface and do rust-proof treatment. The distance between the screw and the board shall be greater than 15mm (if the non-cutting edge is 10mm from the edge of the board), and the distance shall be 150-170mm. The screw that is deformed in the installation shall be removed, and the screws shall be reinstalled 50mm apart; the short-edge joint of the plasterboard shall be Staggered, long side and main keel installed in parallel, seams should be left 5-8mm gap (such as the back of the V-groove must ensure the slot depth and screw and cutting edge 15mm spacing), a variety of ceiling panels and walls should be pre- Leave seams, slits should be 3-5mm. The gypsum board shall be pressed on a small surface, and when the double-layer gypsum board is installed on the side of the pressure surface, the joints of the upper and lower plates shall be staggered and shall not be jointed on the same keel. When the transversal keel is installed, one wall below 3m is installed, and two walls are installed between 3 and 5m. The distance between the ceiling sub-keel shall not be greater than 400mm The distance between the main keel lifting point and the height of the arching shall meet the design requirements. When the design is not required, the distance between lifting points should be less than 1.2m.

Ceilings in toilets and kitchens must not be made of plasterboard. Waterproof plasterboards must be used and keel spacing should be properly reduced.

After the ceiling, it must be fully checked for its elevation, levelness and flatness of the bottom of the keel, as well as its stability and stability. The height of the wooden keel shall meet the design requirements and the error of the elevation shall not be greater than 5

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