Practice of Embedded Parts in Prefabricated Houses

The practices for embedded parts in prefabricated houses must strictly adhere to design specifications and construction requirements, with core steps including customized production, precise positioning and installation, and detailed handling, as detailed below:

1. Design and Customized Production of Embedded Parts
   Embedded parts must be custom-designed according to the building's load-bearing requirements, with their specifications (such as dimensions, materials, and load-bearing capacity) and installation positions strictly following the architectural design load requirements. For example, steel plate bases typically use 3mm-thick galvanized steel plates to enhance corrosion resistance; the relative positions of anchor bolts must be precisely measured, and stainless steel leveling support frames should be fabricated to ensure the embedded parts remain horizontal during concrete pouring. The welding of support frames involves using an electric welder to assemble cut mold components, with welding points being firm and free of cold welds to prevent loosening later.

2. Positioning and Fixing of Embedded Parts
   Before structural pouring, embedded parts must be precisely positioned according to the design drawings. For example, when embedding steel pipes for external scaffold connections, steel pipes should be embedded within the outer beams, with their embedding depth and spacing meeting anti-slip requirements, typically enhanced by welding rebar or adding anchor plates for stability. When fixing embedded parts, temporary supports or bolt tightening can be used to prevent displacement during pouring. For complex nodes, laser levels or total stations should be used for three-dimensional positioning to ensure errors are controlled within millimeters.

3. Concrete Pouring and Curing
   After the installation of embedded parts, concrete pouring should be carried out. Pouring should be done in layers with vibration to avoid direct impact on the embedded parts causing misalignment. For large embedded parts (such as equipment foundation bolts), secondary calibration can be performed before the initial setting of concrete to ensure verticality. After pouring, curing should be carried out according to specifications to prevent loosening of embedded parts due to concrete shrinkage. During curing, external impacts should be avoided, and initial position data of the embedded parts should be recorded for later verification.

4. Detail Handling and Acceptance
   The surfaces of embedded parts should be cleaned to remove welding slag, oil, and other impurities, which could affect subsequent connection quality. For exposed parts, anti-rust paint can be applied or protective film can be wrapped. After construction, a special acceptance inspection should be conducted to check the specifications, quantity, position, and verticality of the embedded parts, and pull-out tests should be performed to verify whether the load-bearing capacity meets the design requirements. Only after passing the acceptance can the next construction step proceed.

Key Points Summary: The construction of embedded parts should be based on design documents, ensuring structural safety and functional requirements are met through precise production, positioning and fixing, standardized pouring, and strict acceptance.