Light steel keel ceiling is generally combined with gypsum board and calcium silicate board. , can be made into any shape, like bars, circles, rings, ellipses and other shapes. Light steel keel has flexibility. Through the unique design of designers and careful chiseling by skilled craftsmen, the combination of light steel keel gypsum board can make all kinds of perfect ceilings.
The main dragon of light steel keel ceiling generally adopts 50# light steel keel. If it is a large shopping mall and needs to be overhauled at the top from time to time, it is necessary to use 60 series light steel keel. The 60 series design is designed according to the characteristics of easy access to people and can bear the weight of an adult. Just leave a hole and install a manhole like a general ceiling.
The light steel keel used for the partition wall has 50/75/ 100 series. Use different keels for different occasions. If the space is relatively small, it is suitable for type 50, which can save space. Generally, 75 vertical keel is the most commonly used.
Specification for light steel keel ceiling
1. Design documents such as construction drawing and design specification of suspended ceiling project.
2. Product certificate, performance test report, entry acceptance record and material re-inspection report.
3, take cover engineering acceptance record.
4. Building records.
Technological principle of light steel keel ceiling
1. Snap line: use a level to copy out the leveling points in all corners of the room and pop up the horizontal line.
2. Fixed suspender: In general, the fixed suspender is fixed by expansion bolts. For the ceiling without people, the length of suspender is less than 1000, and φ6 suspender can be used; When it is greater than 1000mm, φ8 suspender shall be adopted and reverse support shall be provided.
3. Installation of the side keel: When installing the side keel, the line should be elastic according to the design requirements. L-shaped galvanized light steel bars should be fixed on the embedded wooden brick with self-tapping screws along the horizontal keel line of the wall, and the concrete wall (column) can be fixed with nails, and the spacing should not be greater than the spacing of the secondary keel of the ceiling.
4. Install the main keel with a spacing of 900 ~ 1000 mm, which should be hung on the suspender and installed in the room in parallel. The ceiling with a span greater than 15m should be on the main keel, and a large keel should be added every 15m, which is welded firmly perpendicular to the main keel.
5. Installation of the secondary keel: The secondary keel and the main keel should be close together with a distance of 300 ~ 600 mm When the secondary keel is fixed on the main keel with a T-shaped galvanized iron sheet connector, both ends of the secondary keel should be placed on the horizontal flange of the L-shaped side keel.
6. Installation of cover panel: the long side of gypsum board should be laid along the longitudinal secondary keel; The distance between the self-tapping screw and the edge of the gypsum board is 10~ 15mm for the edge of the board wrapped with tissue paper and 15~20mm for the edge of the board cut. Its decorative plate should be fixed in a free state to avoid bending and bulging.
Installation method of light steel keel ceiling
1, derrick
When the floor is a precast slab, the steel hook for hanging the suspender has been embedded in the joint of the slab, as long as the upper end of the suspender is bent and twisted through the hook hole. When cast-in-situ floor slab is cast, the position line of embedded parts shall be laid out at the bottom of the floor slab, and the embedded parts shall be nailed to the bottom of the floor slab with nails, and the upper end of the suspender shall be bent and twisted through the eyelets on the embedded parts.
2. Big keel
Put all the vertical hanging pieces of the big keel on the dog keel, transfer the big keel upward, make the lower end of the suspender pass through the upper hole of the vertical hanging pieces of the big keel, and add nuts for preliminary tightening. According to the springing height of the sharp point in the ceiling of the room (generally 2:0 of the short span of the room), the springing value of each lifting point of the big keel is calculated, and the overall springing value of the big keel is made by screwing nuts, and the vertical hanger of the big keel is fixed after adjustment.
3. Install the middle keel
Put all the vertical hangers of the middle keel on the big keel, and transfer the middle keel upward so that the middle keel can be buckled with the vertical hangers of the middle keel. If the middle keel intersects the cross brace, the plane connector of the middle keel is placed on the middle keel, and the cross brace is buckled on the plane connector of the middle keel.