Given that standardized design of participating projects is a key feature of industrialized architecture, the use of unified modular coordination in size and type combinations of building units forms the foundation for determining project standardization levels. It also dictates the variety and specifications of components and parts used throughout the project.
The standard establishes the following requirements regarding the reuse rates of specifications and types for basic building units, components, and parts:
Evaluation of Building Units
For single residential buildings with no more than three basic units, the project automatically meets the required score. When there are more than three basic units, the score is based on the ratio of the combined area of the three most frequently reused units to the total building area, which must be at least 70%.
Similarly, for public buildings, a building with three or fewer basic units meets the score. If there are more than three basic units, the score depends on the proportion of the total area of the top three reused units relative to the building’s total area, which should not be less than 60%.
Evaluation of Prefabricated Components
The standard requires that, within a single building, the total number of one or three specifications of prefabricated components with the highest reuse rate—excluding cast-in-place components—must comply with the criteria outlined in Table 4.2.1.
Evaluation of Building Components
For external windows, the combined total of the three most frequently reused specifications in a building should constitute at least 60% of all external windows. For interior building components, including integrated bathrooms, cabinets, and storage rooms, the top three most commonly reused specifications must account for no less than 70% of the total number of similar components.
The standard also highlights three additional key points:
1. In-depth Evaluation of Project Design
Design depth refers primarily to whether the project design supports factory production and assembly construction, differing from traditional design depth requirements. This is reflected by several factors, including:
- The level of detail and completeness in component drawings
- The integration of component design with manufacturing technology
- The coordination between component design, transportation, lifting, and assembly processes
- Consideration of construction site conditions like external frame constraints, formwork, and support systems
2. Preparation of Construction Organization Plans
Participating projects should develop construction organization designs based on industrialized construction methods. These plans must facilitate coordination across architectural design, decoration, production, transportation, assembly, construction, and renovation.
Industrialized construction refers to the integrated technologies and management approaches applied throughout key phases such as design, component production, assembly, and interior finishing. The process emphasizes seamless cooperation among design, manufacturing, logistics, hoisting, construction, and decoration teams.
Effective plans should include clear engineering schedules, technical strategies, quality control measures, material supply management, and defined responsibilities. On-site logistics—such as component transportation, stacking, and lifting—must be well-organized. Additionally, preparatory organizational steps like reserved embedments, temporary supports, joint surface cleaning, installation sequencing, and component connections are essential before installation.
3. Adoption of Information Management Technology
The entire project lifecycle—from design and production to transportation, construction, supervision, and operation—should utilize information management systems to enable collaborative workflows.
Full-process information management is a hallmark of industrialized construction. However, given the current state of building information technology, it remains challenging for projects to implement comprehensive data platforms that integrate design, manufacturing, construction, logistics, and operational management into a unified system.
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