Replacement of Prefabricated Slabs in Rural Houses

The replacement of prefabricated slabs in rural houses must strictly adhere to building safety regulations and be carried out cautiously in stages to ensure structural safety.

I. Preliminary Inspection and Condition Confirmation
Before replacement, a professional agency should be commissioned to conduct a comprehensive inspection of the house structure, focusing on two key points:

1. Wall Nature: Distinguish between load-bearing and non-load-bearing walls. Load-bearing walls are the core supports of the house structure. If the area requiring slab replacement involves load-bearing walls, partial wall removal or reinforcement measures are usually necessary, which are complex and high-risk operations; non-load-bearing walls are relatively flexible and may meet the conditions for slab replacement without wall removal.
2. Original Floor Structure: Confirm whether the original floor is a prefabricated slab. If it was originally a cast-in-place floor, the structural compatibility of replacing it with a prefabricated slab needs to be reassessed, as the force-bearing modes of the two are different, and direct replacement may affect overall stability.
   The inspection results will directly determine the feasibility of subsequent construction plans, such as whether local wall reinforcement or floor span adjustments are necessary.

II. Material and Plan Selection

1. Compatible Prefabricated Slabs: Select hollow prefabricated slabs based on the house span and load requirements, ensuring their specifications (such as thickness, span, and reinforcement) comply with current building standards. For example, rooms with larger spans require slab types with stronger bending resistance to avoid deformation or cracking due to insufficient load-bearing capacity.
2. Professional Construction Plan: The construction team should formulate detailed steps, including methods for removing old slabs (such as segmented cutting or overall lifting), methods for fixing new slabs (such as mortar bedding or welding connections), and how to avoid damaging the wall structure. For example, temporary supports should be set up on surrounding walls when removing old slabs to prevent local instability.

III. Construction Safety and Supervision

1. Equipment and Protection: Use compliant lifting equipment (such as truck cranes) to lift prefabricated slabs, avoiding accidents caused by manual handling; set up warning lines in the construction area to prevent personnel from entering accidentally; take reinforcement measures for key parts (such as connections to load-bearing walls), such as adding temporary steel supports.
2. Full-process Supervision: The construction party should arrange for dedicated personnel to inspect the implementation of safety measures, such as whether the load of the lifting equipment matches and whether the support frames are stable. If cracks appear in the walls or signs of floor subsidence are detected, construction should be immediately stopped, and the plan should be adjusted.

IV. Acceptance and Subsequent Maintenance
After construction is completed, a testing agency should be commissioned to inspect the new floor and walls, focusing on checking:

• Floor flatness and joint sealability;
• Whether new cracks appear at the connections between walls and floors;
• Whether the overall structure meets load-bearing requirements.
  The house can only be put into use after passing the acceptance inspection, and the usage of the floor should be regularly observed. If any abnormalities are found, timely treatment is required.