ã€China Aluminum Network】 Aluminum alloy keel ceiling construction process flow: positioning of the bullet line - to determine the ceiling elevation - fixing of the derrick or galvanized iron - keel installation and leveling - ceiling plate installation. (1) Positioning of bullets According to the design drawings, combined with specific conditions, the keel and hanging point position to the floor of the floor. If the ceiling design requires a certain shape or pattern, the axis of symmetry of the ceiling shall be ejected first, and the positions of the keel and the suspension point shall be arranged symmetrically. The distance between the keel and the boom and the main keel spacing are important factors that affect the height of the ceiling. Different keel sections and lifting point spacing may affect the distance between the main keels. A variety of ceilings, keel spacing and boom spacing are generally controlled within 1.0 to 1.2m. The line should be clear and accurate. Aluminum alloy ceiling, if the slats are stuck on the keel, the keel should be perpendicular to the board; if the use of screws, it depends on the shape of the slats, as well as the design requirements and specific control. (2) Determine ceiling elevation The design elevation line is projected on the surrounding wall or on the cylinder surface; if the ceiling has different elevations, the location of the variable section should be bombed onto the floor. Then the angle aluminum or other sealing material is fixed on the wall or cylinder. The bottom surface of the sealing material coincides with the elevation line. The common specification of angle aluminum is 25mm×25mm. The angle aluminum of the aluminum alloy plate ceiling should be the same as the color of the plate. Angle aluminum is mostly fixed with high-strength cement nails, and it can also be fixed with shot screws. (3) Fixation of derrick or galvanized iron wire With the structure of one end of the fixed, the common method is to use a nail gun (also known as stone gun) to fix the derrick or galvanized iron wire. Two types of nails can be used with or without holes. If a material such as an angle steel is used as a hanger, most of the keel is made of ordinary steel. The impact drill is used to fix the expansion bolt, and then the hanger is welded to the bolt. The fixing of the boom and the keel. It can be fixed by welding or drilling with bolts. (4) Installation and leveling of the keel During installation, according to the determined main keel (large keel) position and the determined elevation line, it will be roughly in place. The secondary keel (medium and small keel) should be placed in place against the main keel. After the keel is in place, it is then full-horizontal to control the elevation line (cross center line), starting from one end, while installing, adjusting and fine-tuning it again until the keel is leveled and straightened. If the area is larger, proper arching of the horizontal line should also be considered in the middle. When adjusting the level, be sure to adjust it from one end to the other to make it straight and horizontal. Especially for the aluminum alloy ceiling, the leveling and straightening of the keel is a troublesome construction process. Whether the keel is leveled is also the key to the quality control of the plank ceiling. Because only the keel is leveled, the slat veneer can achieve the desired decorative effect. Otherwise, the wavy ceiling surface does not look pleasant. The keel should be nailed along the wall or column elevation line. High-strength cement nails are generally used for fixing, and the spacing of nails should not be more than 50 cm. If the strength of the grass-roots material is low and the fastening force is not good, appropriate measures should be taken to change the length of the bolt or increase the length of the nail. Side keels are generally not load-bearing, but only play a sealing role. General selection of connector length. The connecting piece can be made of aluminum alloy or galvanized steel plate, which is punched into a barb on the surface and connected to the square hole of the main keel. Correct the position and level of the primary and secondary keels completely and install the connectors in a wrong position. (5) Ceiling Panel Installation When the ceiling plate is installed, the geometrical dimensions of the plate should be adapted to the load capacity of the aluminum alloy keel ceiling. If the grid size is 600mmx900mm and 600mmx1200mm, the gypsum board cannot be installed but only the mineral wool board can be installed.