The difference between the light steel keel and the painted keel is that the ordinary light steel keel is not coated, and the coating is made (galvanized), while the surface of the painted keel has been painted, generally divided into black and white, and a few are baked into other colors according to design requirements. Mainly because the paint keel is mostly used in the Ming keel, the baking varnish is to ensure that the exposed part does not rust and affect the appearance.
The light steel keel has a ceiling keel and a partition keel according to the purpose, and has V-shaped, C-shaped, T-shaped and L-shaped keels according to the section.
(1) Product specifications series The main specifications of the partition keel are divided into Q50, Q75 and Q100. The main specifications of the ceiling keel are divided into D38, D45, D50 and D60.
(2) Product marking method The marking order of the light steel keel is: product name, code number, width and height of the section shape, steel plate thickness and standard number. For example, the section shape is "C", the width is 50mm, the height is 15mm, and the thickness of the steel plate is 1. smm. The ceiling keel is marked as: Light steel keel for construction DC 5 0 XIS XI. SGBllg sl
(3) Appearance quality The shape of the light steel keel should be flat and the edges and corners should be clear. The incisions are not allowed to have burrs and deformations that affect the use. The galvanized layer is not allowed to have defects such as peeling, tumor, and shedding. For defects such as corrosion, damage, dark spots, pitting, etc., the test according to the specified method shall comply with the requirements of Table 2-81. When the appearance quality is checked, visual inspection shall be carried out under the condition that the light is bright at 0.5 m from the product. The surface of the light steel keel shall be galvanized and rust-proof. The double-sided galvanizing amount shall be not less than 120g/m*m, the first-class product shall not be less than 100g/m*m, and the qualified product shall not be less than 80g/m*m.
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