Light steel keel is classified by use into ceiling keel and partition keel, and by cross-sectional shape into V-shaped, C-shaped, T-shaped, L-shaped, and U-shaped keel.
The marking order for light steel keel is: product name, code, width and height of cross-section, steel plate thickness, and standard number. For example, a ceiling keel with a "C" shaped cross-section, a width of 50mm, a height of 15mm, and a steel plate thickness of 1.5mm is marked as: Light Steel Keel for Construction DC50×15×1.5 GB11981.
Regarding appearance quality, light steel keel should have a flat surface, clear edges, and no burrs or deformations that would affect its use. The galvanized layer should not have defects such as peeling, nodules, or flaking. For defects such as corrosion, damage, black spots, and pitting, the inspection should conform to the requirements of Table 2-81 when tested according to the specified methods. Visual inspection should be conducted under bright lighting conditions at a distance of 0.5m from the product.
The surface of light steel keel should be galvanized for rust prevention. The double-sided galvanizing amount: for superior grades, not less than 120g/m*m.
Painted Keel
Painted keel is made of fire-resistant galvanized sheet, durable and long-lasting. It adopts an economical placement structure, special connection method, and modular assembly and disassembly. Convenient, time-saving, and simple construction. The keel surface uses galvanized steel sheet, treated with a baked enamel finish.
The difference between light steel keel and painted keel is that ordinary light steel keel does not have a coating treatment, only a galvanized layer, while painted keel has a painted surface, generally black and white, with a few painted in other colors according to design requirements. This is mainly because painted keel is mostly used in exposed keel systems, and the paint is to ensure that the exposed parts do not rust and do not affect the appearance.
Exposed Frame Keel
Flat series, grooved series, three-dimensional grooved series. Concealed Frame Keel: Flat series. Painted keel has a good overall flat effect, simple lines, and is beautiful and elegant. Painted keel is safe, sturdy, and aesthetically pleasing, suitable for use with various mineral wool ceilings, aluminum square ceilings, calcium silicate boards, etc.
It features lightweight, high strength, waterproof, fireproof, shockproof, sound insulation, and sound absorption properties. It also boasts advantages such as short construction time and easy installation, making it a new type of ceiling decoration material widely used in shopping malls, hospitals, banks, hotels, factories, airport terminals, etc.
The main specifications for partition keels are Q50, Q75, and Q100.
The main specifications for ceiling keels are D38, D45, D50, and D60.
