The light steel keel has ceiling keel and partition keel according to the application, and has V-type, C-type, T-type, L-type and U-type keel according to the section.

The marking order of the light steel keel is: product name, code, width, height, thickness of steel plate and standard number. For example, the

shape of the cross-section is “C”, the width is 50mm, the height is 15mm, and the thickness of the steel plate is 1.5mm.

Appearance quality The shape of the light steel keel should be smooth, the edges and corners are clear, and the incision is not allowed to have burrs and deformations that affect the use. The galvanized layer is not allowed to have defects such as peeling, bumping, and shedding. For defects such as corrosion, damage, dark spots, and pitting, the detection in accordance with the prescribed methods shall comply with the provisions of Table 2-81. During the appearance quality inspection, visual inspection should be conducted under bright light conditions 0.5m away from the product.

The surface of the light steel keel should be galvanized to prevent rust, and the amount of galvanizing on both sides: excellent product is not less than 120g / m * m