What are the tips for installing Multi-section chemical screws in concrete and natural hard stone substrates?

When installing Multi-section chemical screws in concrete and natural hard stone substrates, special attention should be paid to the following tips to ensure fastening effect and structural safety:

1. Surface treatment: Choose the appropriate surface treatment method. Zinc or Dacromet coating can provide good corrosion protection and extend the service life of the screws.

2. Material matching: Use screws made of carbon steel because of their high strength and low cost, which are suitable for heavy-duty fastening needs.

3. Chemical adhesive application: Use high-performance chemical adhesives to enhance the bonding force between the screws and the substrate and improve the overall stability.

4. Drilling accuracy: When drilling holes in concrete or hard stone, the hole diameter and depth must be accurately controlled to avoid excessive or too small holes that affect the screw fixing effect.

5. Preheating the substrate (low temperature environment): When constructing under cold conditions, the substrate can be properly preheated to prevent stress concentration caused by temperature differences.

6. Layered fastening: For thicker substrates, use the layered fastening method to tighten the screws step by step to ensure uniform force.

7. Vibration and compaction: During the pouring process, air is removed by vibration to make the concrete around the screws more compact and improve the connection reliability.

8. Maintenance measures: After installation, take appropriate maintenance measures according to environmental conditions, such as covering with moisturizing materials to ensure that the threads and adhesives are fully cured