The marking sequence of light steel keel is: product name, code, width and height of section shape, thickness of steel plate and standard number. For example, a C-shaped ceiling keel with a width of 50mm, a height of 15mm and a steel plate thickness of 1.5mm is marked as: light steel keel for building.
_ Appearance quality The appearance of light steel keel should be smooth and angular, and the incision should not have burrs and deformation that affect the use. The galvanized layer is not allowed to have defects such as peeling, swelling and falling off. For corrosion, damage, black spots, pits and other defects. When the test is carried out according to the specified method, the provisions in Table 2-8 1 shall be met. When checking the appearance quality, visual inspection shall be carried out in bright light 0.5m away from the product. The surface of light steel keel should be galvanized for rust prevention, and the amount of double-sided galvanizing: high-grade should not be less than120g/m * m.
Paint keel
The painted keel is made of fireproof galvanized sheet, which is durable. Adopt economical placement structure, special connection mode and combined loading and unloading. Convenient, labor-saving and simple in construction. The keel surface is made of galvanized steel plate, which is treated by baking paint.
The difference between light steel keel and painted keel is that light steel keel is generally painted (galvanized) without painting treatment, while painted keel surface is painted, which is generally divided into black and white, and a few are baked into other colors according to design requirements, mainly because painted keel is mostly used for Ming keel, and painted keel is to ensure that the exposed part will not rust and will not be affected.