· Correct Size of Reserved Openings: Reserve openings based on the cross-sectional dimensions of the cable trays and busbars. Increase the width and height of the openings by 100mm to provide adequate space for effective sealing.
  · Use of Adequate Steel Plates: Implement 4mm thick steel plates for protection. The width and height of these plates should be extended by an additional 200mm compared to the cable tray’s dimensions. Before installation, ensure these plates are treated to remove rust, coated with anti-rust paint, and finished with a fireproof coating.
  · Building Water Stop Platforms: In vertical shafts, ensure that reserved openings are constructed with a smooth and aesthetically pleasing water stop platform that facilitates effective sealing.
Layered Placement of Fire Blocking Materials: When placing fire blocking materials, do so layer by layer, ensuring that the stacked height aligns with the water stop platform. This approach creates a compact barrier against fire spread.
  · Thorough Filling with Fireproof Mortar: Fill the gaps between the cables, trays, fire blocking materials, and water stop platform with fireproof mortar. The sealing should be uniform and tight, creating a smooth surface that meets aesthetic expectations. For projects that demand higher standards, consider adding a decorative finish.