Fujian Prefabricated House Construction Plan

The Fujian prefabricated house construction plan needs to integrate policy standards, technical systems, and engineering practices, as detailed below:

I. Types and Applications of Prefabricated Components

According to the 'Fujian Provincial Guide for the Application of Prefabricated Temporary Structures in Construction (Trial)', prefabricated houses encompass 23 types of temporary components:
Underground types include prefabricated septic tanks, drainage ditches, inspection wells, sedimentation tanks, cable trenches, etc., suitable for underground pipelines and sewage treatment systems; Ground types include standardized cabins, integrated access control booths, standardized protective sheds, prefabricated vertical safety passages, etc., used for temporary offices, safety protection, and passage facilities. Component selection should be based on the project's functional requirements, such as prioritizing standardized cabins for office areas and prefabricated vertical safety passages for construction passages.

II. Core Construction Technologies

1. Fully Assembled Beam-Slab Integrated Support-Free and Formwork-Free System
   Beam and slab components are prefabricated in the factory and directly hoisted on-site, achieving 'five exemptions' (exemption from supports, formwork, external scaffolding, tower cranes, and elevators), with an assembly rate of 94% and a construction period shortened by 52% compared to cast-in-place methods. This technology is suitable for multi-story factories or temporary buildings, reducing on-site wet operations and mechanical dependencies.
2. Innovative Technologies for Prefabricated Columns and Joints
   Adopting beam-column joint clamping corbels and prefabricated double-column cup-mouth rapid installation technologies, reducing welding operations through standardized connectors, cutting solid waste emissions by over 90%, and enhancing construction environmental friendliness.
3. Modular Production and Standardized Installation
   During the production phase, steel cutting, welding, wall installation, and circuit laying are completed in the workshop, with quality errors controlled to the millimeter level; during the installation phase, boxes are connected via bolts, with concealed water and electricity pipelines, enabling rapid combination in as little as 1 day, suitable for rapid deployment needs.

III. Construction Process and Key Points

1. Design Phase
   Customize dimensions (e.g., 3×6 meters, 3×9 meters) and functional partitions (bedrooms, offices, etc.) based on usage scenarios; in coastal areas of Fujian, wind resistance design should be strengthened, with a wind resistance rating of ≥8 and a roof slope of 15° to reduce wind resistance.
2. On-Site Installation
   After fixing the foundation embedded parts, hoist the boxes and secure them with bolts; seal doors and windows, and install windproof rubber strips in coastal areas to prevent rainwater leakage.
3. Quality Control
   Strictly adhere to the production, transportation, and installation standards in the 'Guide', referencing the case of the Shanghang Environmental Protection Science and Technology Industrial Park, ensuring construction accuracy through digital full-link management (e.g., BIM technology).

IV. Material Selection Recommendations

1. Main Frame: Choose Q235 hot-dip galvanized steel for strong rust resistance, suitable for Fujian's humid climate.
2. Wall Materials: Polystyrene core color steel sandwich panels (for insulation) or rock wool core (for fire resistance), meeting different functional requirements.
3. Floor Materials: Non-slip and wear-resistant composite flooring to enhance safety in use.

Typical Case: The first phase of the Shanghang Environmental Protection Science and Technology Industrial Park adopted a fully assembled beam-slab integrated + assembled composite exterior wall panel system, with a total construction area of 200,000 square meters, an assembly rate of 94%, a 95% reduction in solid waste, an 80% reduction in water consumption, and a 2.6% lower cost compared to cast-in-place methods, verifying the feasibility of the technical system.