Specification Requirements for Prefabricated Panels of House Frames
The specification requirements for prefabricated panels of house frames cover aspects such as dimensions, materials, production processes, installation, and building planning approvals, as detailed below:
Dimension Specifications
The standard dimensions of prefabricated panels should be designed according to the usage scenario. Common lengths include fixed series such as 3 meters, 4 meters, and 5 meters, with widths generally not exceeding 1 meter. Strict requirements for resting lengths: When directly resting on brick walls, the length should not be less than 100 millimeters; when resting on reinforced concrete ring beams, it should not be less than 80 millimeters. If reinforced by extending steel bars from the panel ends and grouting, the support length can be reduced to 40 millimeters, provided that the panel joint width is not less than 80 millimeters and the grouting concrete strength is not lower than C20. Overhead thickness and length must meet safety standards: The overhead thickness of floor and wall panels should not be less than 50 millimeters, and that of panel columns should not be less than 100 millimeters. The overhead length of floor and wall panels should not exceed 2 meters, and that of panel columns should not exceed 3 meters.
Material Specifications
Prefabricated panel materials must comply with national standards, including concrete strength, steel bar specifications and quantities, insulation, and waterproofing materials. Flammable materials are prohibited in crowded places: The use of foam sandwich panels is strictly prohibited; instead, non-combustible or fire-resistant materials such as rock wool must be used to reduce fire risks.
Production Process Specifications
The production process must strictly follow the workflow, from raw material preparation, processing, molding, curing, to factory inspection, with quality control at each step. For example, the concrete mix ratio must be precise, and the curing time and conditions must comply with specifications to ensure the strength and durability of the prefabricated panels meet standards.
Installation Specifications
Site inspection is required before installation: Ensure the foundation is level and sturdy to avoid structural deformation due to foundation issues. Standardized operations during construction: The connections between prefabricated panels must be secure with good sealing to prevent leakage or loosening; panel joint treatment must meet design requirements, such as the strength and width of the grouting material. Post-installation inspection is required: Confirm safety through quality inspections, including load-bearing tests and connection joint checks.
Building Planning and Approval
The construction of prefabricated panel houses must comply with local land use planning and laws and regulations. Land use rights and building permits must be obtained before construction to ensure legal compliance. Unauthorized construction without approval may face the risk of demolition or legal liability.
