Installation of Prefabricated Concrete Beams in Houses

The installation of prefabricated concrete beams in houses should follow a scientific and standardized process, covering key aspects such as installation sequence, construction preparation, installation process, temporary support and removal, and quality control. The specific points are as follows:

The installation sequence must strictly adhere to the principle of "main beams first, then secondary beams; lower beams first, then higher beams". As the primary load-bearing components of the structure, main beams should be installed first to form a stable framework. Secondary beams are installed on top of the main beams, and work at higher levels can only commence after the installation of lower beams is completed to avoid cross-interference and ensure construction safety and efficiency.

Construction preparation is the fundamental guarantee for installation quality.

• Technical preparation: Before construction, a drawing review should be organized to verify the consistency of the prefabricated beam models, specifications, and quantities with the design. The elevation, axis, and concrete strength of the supporting structure should also be rechecked. Surveyors should mark the centerline, edge lines, and elevation control lines of the beams on the column tops or corbel surfaces to provide a basis for precise installation.
• Site preparation: The construction road should be flat and firm to meet the traffic requirements of lifting machinery and beam transport vehicles. Warning lines should be set up in the lifting area, and sufficient lighting should be provided for night construction to prevent unauthorized personnel from entering the work area.
• Resource allocation: Select lifting machinery based on the maximum weight, installation height, and working radius of the prefabricated beams. Equip experienced lifting commanders, riggers, and other special operation personnel, and prepare sufficient steel wire ropes, shackles, lifting devices, and other materials to ensure lifting safety.

The installation process requires attention to operational specifications and precision control.

• Lifting: For large-span or heavy prefabricated beams, a special lifting calculation sheet should be prepared to verify the forces on the lifting slings, lifting points, and lifting machinery to ensure that the safety factor meets the standards. During lifting, keep the beam stable, avoid colliding with the supporting structure, and accurately place it in the predetermined position.
• Verification and adjustment: After installation, verify the height difference and width of the beam bottom joints. If the height difference does not meet the requirements, re-lift the beam and adjust it using adjustable supports to ensure a flat joint and avoid stress concentration or leakage problems in the later stage.

Temporary support and removal require strict timing control. Temporary supports should be removed after the strength of the post-poured concrete reaches the design requirements. Premature removal may lead to structural instability, while delayed removal may affect the construction progress. Before removal, conduct strength tests to ensure structural safety.

Quality control and acceptance are the ultimate guarantees for the installation project. During construction, quality inspections should be carried out in accordance with specifications and design requirements. After installation is completed, organize an acceptance inspection, focusing on checking the position, elevation, joint quality of the beams, and the removal of supports to ensure that the installation quality meets the standards.