Full Installation Process of Prefabricated Beams in Houses

The full installation process of prefabricated beams in houses includes the following steps:

1. Setting Out Control Lines Set out control lines for the length of the prefabricated beam's placement on the prefabricated column, typically 10 millimeters. This step is used to determine the installation position of the prefabricated beam, ensuring its connection accuracy with the prefabricated column. The control lines must be marked using professional measuring tools (such as laser levels) to avoid affecting subsequent construction due to positional deviations.

2. Installing Support Frames

• Frame Structure: Use steel pipes with a diameter of 48 millimeters as the main supports, connected by couplings to form a stable framework; the main battens use steel pipes of the same specification, and the secondary battens use 50×100 millimeter square timbers to form a layered support system.
• Bottom Treatment: The bottom of the support frame must be laid with 20-millimeter-thick wooden pads to distribute pressure and prevent settlement; adjustable bases are provided at both the top and bottom to facilitate height adjustments of the frame, accommodating different elevation requirements.
• Stability Requirements: The frame must be installed vertically, with couplings securely connected, ensuring that the overall structure does not tilt or deform during lifting.

3. Lifting Prefabricated Beams

• Lifting Tools:
  • Use a lifting beam spreader, securing the hook to the dedicated lifting points on the prefabricated beam (usually embedded lifting rings or reserved holes) to ensure even force distribution.
  • Alternatively, use a crane with steel wire ropes for lifting, requiring precise control of the hovering position to place the prefabricated beam between two foundation piles.
• Manual Guidance: Construction personnel must manually adjust the reserved holes at the bottom of the beam to align them with the connectors (such as bolts or rebar) on the prefabricated column, ensuring installation accuracy.

4. Unhooking and Preliminary Fixing After the prefabricated beam is placed steadily, confirm that there is no relative displacement with the support frame before unhooking. At this point, check whether the beam is level to avoid cracking or deformation due to uneven local force distribution.

5. Elevation Re-measurement and Adjustment Use a level to re-measure the elevation of the prefabricated beam, with an allowable error controlled within 5 millimeters. If the error exceeds the limit, fine-tune the height of the support frame using adjustable bases until it meets the specification requirements.

6. Repeated Installation and Overall Acceptance Install other prefabricated beams sequentially, re-measuring the elevation and recording data after each installation. After all installations are completed, conduct an overall structural acceptance, checking whether the beam connections are secure and the support frames are stable, ensuring compliance with design and safety standards.

Key Precautions:

• Set up a warning zone during the lifting process to prohibit unauthorized personnel from entering;
• Suspend construction in adverse weather conditions (such as strong winds or heavy rain);
• All materials and tools must comply with national standards to avoid safety hazards caused by quality issues.