Process flow of aluminum air grille ceiling

1. determine the height and use the high level line on the wall. 2. Fix the suspender on the top with iron expansion bolt, and fix the light steel keel under the suspender horizontally (if the grid span is not more than 3m, the suspender is not needed) 3. Use cement nails to nail the aluminum angle line along the horizontal line 4. Put the aluminum air grille on the ground and assemble it completely 5. Place the assembled grid ceiling on the aluminum angle iron, and tie the middle position with thin wire directly on the light steel keel (1) Line snapping Use the level gauge to mark out the horizontal points on each wall (column) corner in the room (if the wall is long, several points should also be marked appropriately in the middle), pop up the level line (the distance between the level line and the ground is generally 500mm), measure from the level line to the design height of the ceiling, and pop up the level line along the wall (column) with chalk line, which is the lower line of the ceiling grid. At the same time, according to the ceiling plan, the position of the main keel shall be popped on the concrete roof. The main keel shall be divided from the center of the ceiling to both sides with a maximum spacing of 1000mm, and the fixed points of the suspenders shall be marked with a spacing of 900mm-1000mm. If the fixed points of beams and pipes are larger than the requirements of design and regulations, the fixed points of suspenders shall be added. (2) fix the suspender Fix the hanger rod with expansion bolt. The suspender of ф 6 can be used. Cold drawn steel bars and round steel bars can be used for suspenders, but the round steel bars shall be straightened mechanically. One end of the suspender shall be welded with L30 * 30 * 3 angle code (the hole diameter of the angle code shall be determined according to the diameter of suspender and expansion bolt). The other end can be sleeved with a screw rod larger than 100mm, or the finished screw rod can be purchased for welding. The fabricated suspender shall be treated with rust prevention. The suspender shall be fixed on the floor slab with expansion bolts, and holes shall be punched with impact electric hammer. The hole diameter shall be slightly larger than the diameter of expansion bolts. (3) installation of light steel keel The light steel keel shall be hung on the suspender (if the ceiling is low, this process can be omitted and the next process can be carried out directly). 38 light steel keel is generally used, with a spacing of 900mm-1000mm. The light steel keel shall be installed parallel to the long direction of the room, and shall be arched at the same time, with a height of 1 / 200-1 / 300 of the room span. The cantilever section of the light steel keel shall not be more than 300 mm, or the suspender shall be added. Butt joint shall be adopted for main keel extension, and butt joints of adjacent keels shall be staggered with each other. The light steel keel shall be basically leveled after hanging. For the ceiling with a span of more than 15m, a large keel shall be added on the main keel every 15m, and the vertical main keel shall be welded firmly. (4) installation of spring piece: connect the suspender with light steel keel (if the ceiling is low, the spring piece can be directly installed on the suspender, omitting this process), with a spacing of 900mm-1000mm, and then clamp the spring piece on the suspender. (5) main and auxiliary bone assembly of grid Pre assemble the main and auxiliary bones of the grid in accordance with the requirements of the design drawings. (6) grid installation Put the pre installed grid ceiling through the main bone hole with a hook and lift it. After connecting the whole grid ceiling, adjust it to the level.