Mastering the Technical Requirements & Manufacturing Process of Light Steel Keel for Optimal Construction

The technical requirements for light steel keel typically include the following aspects:

- **Double-sided Galvanized Quantity**: Reflects the keel's rust prevention capability, generally categorized according to the GB/T 11981 standard into first-grade (≥150g/m²), second-grade (≥120g/m²), third-grade (≥100g/m²), and qualified grade (≥80g/m²).

- **Galvanized Layer Thickness**: Typically, the thickness for first-grade is ≥19μm, second-grade ≥16μm, third-grade ≥14μm, and qualified grade ≥12μm.

- **Flatness**: The flatness of the keel affects the installation effect and structural stability. For example, the lateral flatness requirement for first-grade is ≤0.3mm/m, second-grade ≤0.5mm/m, third-grade ≤0.7mm/m, and qualified grade ≤1.0mm/m; for the bottom surface, the requirements are first-grade ≤0.4mm/m, second-grade ≤1.0mm/m, third-grade ≤1.5mm/m, and qualified grade ≤2.0mm/m.

- **Wall Impact Resistance Test**: The residual deformation should be ≤10.0mm, with no obvious deformation of the keel.

- **Wall Static Load Test**: The residual amount should be ≤2.0mm.

- **Material, Specifications, Installation Spacing, and Connection Methods of the Keel**: Should comply with design requirements. Metal hangers and keels must undergo surface anti-corrosion treatment; wooden hangers and keels should be treated for anti-corrosion and fire prevention.

- **Deflection**: When selecting ceiling light steel keels, this indicator should be considered.

- **Stability**: Each connection point of the light steel keel frame must be stable, tightly fitted without looseness, and connecting pieces should be installed in a staggered manner.

In practical applications, common types of light steel keel used for partition walls include horizontal keels, vertical keels, and transverse keels, etc. Ceilings commonly use main keels and secondary keels. Different types of light steel keel may have different roles and requirements in construction, and specific technical requirements may vary depending on the special needs of the project, relevant standards, and the types of light steel keel used.

Additionally, there are some technical points to note during construction, such as accurate snapping lines to ensure the precise positioning of the keel installation; secure and reasonably spaced hanger fixtures; maintaining straightness and proper spacing in the installation of main and secondary keels; and attention to panel seam treatment when installing lining panels.

If used for specific building structures or systems, it may also be necessary to meet corresponding specifications and standards. When selecting and constructing light steel keels, it is recommended to refer to relevant national standards, industry standards, and the design requirements of the specific project.

The manufacturing process of light steel keel includes the following steps:

1. **Raw Material Preparation**: Selecting hot-dip galvanized steel coil as the raw material that meets the standards.

2. **Coil Processing**: Cutting the coil to the required dimensions.

3. **Stamping Processing**: Using a stamping machine to press the coil into keels of various shapes and sizes, such as U-shaped, T-shaped, H-shaped, etc.

4. **Bending Processing**: Bending the stamped keels to form the required curves or angles.

5. **Surface Treatment**: Treating the surface of the keel, such as galvanizing, painting, etc., to improve its rust prevention and aesthetic performance.

6. **Quality Inspection**: Inspecting the manufactured light steel keel for quality, including checks for dimensions, shape, and surface quality.

7. **Packaging and Storage**: Packaging the inspected and qualified light steel keels for storage and transportation.

The above is the general manufacturing process for light steel keels, which may vary with different manufacturers and production processes.