Light steel joists can be divided into suspended ceiling joists and partition joists according to their uses, and V-shaped joists, C-shaped joists, T-shaped joists and L-shaped joists according to their cross-sectional forms.

The main specifications of partition keel are divided into Q50, Q75 and Q 100.

The main specifications of ceiling keel are divided into D38, D45, D50 and D60.

2.？ The marking sequence of light steel keel is: product name, code, width and height of section shape, thickness of steel plate and standard number.

3.？ In terms of appearance quality, the light steel keel should be flat and sharp, and the notch 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. Whether there is corrosion, damage, black spots, pits and other defects.

Please refer to the following table for specific dimensions and specifications: