Light steel keel according to the use of ceiling keel and partition keel, in the form of cross section with V-type, C-type, T-type, L-type keel
(1) Product specification series The main specifications of the cut-off keel are divided into Q50, Q75 and Q100. The main specifications of ceiling keels are divided into D38, D45, D50 and D60.
(2) Product marking method The marking order of the light steel keel is: product name, code name, width of the section shape, height, plate thickness and standard number. For example, the cross-sectional shape is “Câ€, the width is 50mm, the height is 15mm, and the thickness of the steel plate is 1. The smm 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 smooth, with clear edges and corners, and the incisions must not have burrs and deformations that affect their use. The galvanized layer must not have defects such as peeling, oncogenesis, and shedding. For corrosion, damage, dark spots, and pitting defects, the test shall be conducted in accordance with the provisions of Table 2-81.
When visual inspection is performed, visual inspection shall be carried out under conditions of light illumination at a distance of 0.5 m from the product.
The surface of the light steel keel should be galvanized and rust proofed. The double-sided galvanized quantity should be no less than 120g/m*m for excellent products, no less than 100g/m*m for first-class products, and no less than 80g/m*m for qualified products.
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