Prefabrication Rate of Building Construction in Jiangsu Province

The requirements for the prefabrication rate of building construction in Jiangsu Province are as follows:

I. Requirements for the prefabrication rate of prefabricated building (concrete structure) projects In the bidding activities for prefabricated building (concrete structure) projects, the prefabrication rate of prefabricated buildings (for the part above ±0.00, i.e., the above-ground building part) specified in the design drawings or clearly stated in the bidding documents must meet the standard of not less than 30%. This ratio is defined as the proportion of the total volume of prefabricated concrete components to the total volume of all concrete, and it is one of the core indicators for measuring the degree of industrialization of prefabricated buildings. This requirement applies to prefabricated building projects using concrete structures throughout the province, aiming to promote the development of building industrialization and improve construction efficiency and project quality.

II. Requirements for the application proportion of 'three panels' in single buildings In single buildings, detailed requirements are proposed for the application structure of prefabricated components: The total volume proportion of prefabricated internal and external wall panels, prefabricated stair panels, and prefabricated floor panels (referred to as 'three panels') shall not be less than 60% of the total prefabrication rate. This regulation emphasizes the dominant position of standardized components in prefabricated buildings. By increasing the proportion of 'three panels' usage, construction processes can be further standardized, on-site wet operations reduced, and the carbon emissions throughout the building's life cycle lowered. For example, if the total prefabrication rate of a project is 40%, the volume proportion of 'three panels' shall be at least 24% (40% × 60%).

III. Differentiated requirements for Nanjing As a key city for the development of prefabricated buildings in Jiangsu Province, Nanjing has set higher standards for the prefabrication rate of single buildings:

• Residential buildings: The prefabrication rate of single residential buildings shall be not less than 50%, which is 20 percentage points higher than the basic provincial requirement, reflecting the dual emphasis on living quality and industrialization level.
• Public buildings: The prefabrication rate of single public buildings shall be not less than 40%, taking into account both functional complexity and construction feasibility, and promoting the standardized construction of public facilities such as hospitals and schools. Through differentiated policy guidance, Nanjing has formed a development pattern of 'residential buildings taking the lead and public buildings following up', providing a demonstration for improving the quality and efficiency of prefabricated buildings throughout the province.

Summary: The requirements for the prefabrication rate of building construction in Jiangsu Province present a hierarchical system of 'basic standards + structural optimization + enhanced requirements in key cities'. This system not only ensures the large-scale development of prefabricated buildings throughout the province but also strengthens standardized applications through the proportion constraints of 'three panels'. At the same time, it grants innovation space to key cities, forming a multi-level promotion pattern.