Specifications for Design and Construction of Prefabricated Houses

The specifications for the design and construction of prefabricated houses cover four core aspects: design, construction, materials, and acceptance. The specific requirements are as follows:

Design Specifications

1. Survey and Design Quality: Design units must carry out their work in accordance with mandatory engineering construction standards, ensuring that design documents comply with laws, administrative regulations, and safety standards. They should clearly indicate the specifications, models, and performance indicators of building materials and components to guarantee quality compliance.
2. Design Document Signing System: Registered architects, structural engineers, and others must sign design documents, taking responsibility for their accuracy and strengthening accountability tracing.
3. Structural Design Standards: Adhere to GB 50010-2010 'Code for Design of Concrete Structures' and GB 50009-2012 'Load Code for the Design of Building Structures', specifying the load-bearing capacity, seismic performance, and durability requirements of prefabricated components.
4. Design of Prefabricated Rural Houses: Respect the needs of farmers and reflect regional characteristics. Prioritize a north-south orientation to optimize ventilation and lighting. The floor plan should be regular, with load-bearing components aligned vertically. Functional spaces should include bedrooms, storage rooms, etc., and consider aging-friendly design (such as barrier-free ramps).

Construction Specifications

1. Construction According to Drawings Principle: Construction units must strictly follow design drawings and technical standards for construction, prohibiting unauthorized modifications to the design or cutting corners.
2. Construction Safety Measures: When preparing construction organization designs, safety technical plans should be formulated, and special safety plans should be prepared for high-risk projects (such as lifting).
3. Construction Process Standards: Follow GB 50666-2011 'Code for Construction of Concrete Structures' and JGJ 1-2014 'Technical Specification for Prefabricated Concrete Structures', standardizing the production, transportation, lifting, and connection processes of prefabricated components.
4. Construction of Prefabricated Rural Houses: It is recommended that professional teams or trained craftsmen carry out the construction. A construction plan should be formulated, including component installation, joint construction, and quality and safety management.
5. Construction Process for Rural Self-built Houses: Proceed in the order of foundation treatment, foundation construction, component installation, and roof and waterproofing works, paying attention to details such as splicing and waterproof layer laying.

Material Specifications

1. Building Material Standards: Cement must comply with GB 175-2007 'General Purpose Portland Cement', steel bars with GB/T 1499.2-2018, and aggregates with GB/T 14684-2011 and GB/T 14685-2011.
2. Materials for Rural Self-built Houses: Cement, steel bars, and other materials must comply with national standards. Auxiliary materials such as sand and gravel must also meet standards to ensure the strength of the foundation and foundation.
3. Material Selection for Prefabricated Rural Houses: Prioritize the use of green, economical, and recyclable materials. Prohibit the use of high-energy-consuming or excessively polluting materials and encourage the use of locally sourced materials.

Acceptance Specifications

1. Acceptance of Prefabricated Concrete Houses: Based on GB 50204-2015 'Code for Acceptance of Construction Quality of Concrete Structures', check the dimensional deviations, appearance quality, and strength of components.
2. Acceptance of Rural Self-built Houses: After completion, a comprehensive acceptance of structural safety and usability functions should be conducted. If necessary, quality testing should be carried out to ensure compliance with design requirements.