Policy guidance Advance pre-sale policy incentive In Nanjing, our commercial housing project can apply for the Pre sale License of Commercial Housing in advance after the first precast component is assembled and installed.

For the socially invested commercial housing development projects that meet the requirements of the assembly rate index, our city gives preferential policies to apply for pre-sale permission of commercial housing in advance.

The standard precast composite floor slab is divided into Type I and Type II, which effectively avoid the collision of the extended reinforcement between precast composite floors; Symmetrical reinforcement is adopted, which facilitates the use of standard components under symmetrical and rotating conditions.

Formulate the Guidelines for Construction Drawing Design and Review of Nanjing Municipal Government Procurement of Green Building Materials Pilot Project (Trial), carry out publicity, implementation and training, and open up the design path.

In 2022, there will be 72 precast building projects with standardized design in the city, and the ground floor area will be about 6.2 million square meters.

The Measures of Nanjing Municipal Government for the Management and Guidance of the Pilot Project of Purchasing Support for Green Building Materials was issued to specify the requirements for the implementation, supervision and acceptance of the project, and supervise and verify the green indicators in the use of green building materials..

Since 2017, there have been 294 projects involving pre-sale permission in advance, with a floor area of nearly 25 million square meters, effectively promoting the development of precast buildings in our city.

The standard precast component splitting and layout scheme with various basic functional unit sizes is provided, which basically unifies the component splitting at the design stage and is highly instructive.

Elephant Foot Ferrule

Promoting the development of green building materials with the government procurement demand as the guide, issuing technical guidelines to achieve the large-scale production and application of precast components…

The concept of standardization rate can adapt to the actual situation of most projects, and its versatility and operability have been significantly improved.

Pilot projects of green building materials are widely solicited in government invested projects, and the procurement of green building materials in quantities is encouraged.

After the completion of the review of the construction drawings and the confirmation of the implementation of the expert argumentation opinions, the real estate department shall, according to the review opinions and the “capital investment certificate confirmed and sealed by the supervision unit, the order contract and invoice for precast parts, and the written commitment on the authenticity of the declaration materials” submitted by the construction unit, handle the Pre sale License for Commercial Housing according to the relevant provisions to ensure that the application of precast technology is implemented.

For projects applying for the Pre sale License of Commercial Housing in advance, the municipal (district) industry office with the corresponding approval authority will organize experts to demonstrate the technical scheme and identify the indicators before submitting the project construction drawings for approval free of charge, strictly check the rationality, feasibility and accuracy of indicator calculation of the application of assembly technology, and put forward optimization suggestions for projects with unreasonable technology selection, so as to facilitate the deepening design and adjustment of the construction drawings.

Recently, Nanjing’s experience and practices in innovative development, technical support and other aspects were selected into the List of Experiences that Can Be Replicated and Promoted in the Development of Fabricated Buildings (the first batch) issued by the Ministry of Housing and Urban Rural Development, which has written a strong footnote to the creation of our city’s national precast building demonstration city.

In the ward building alone, the carbon reduction of six types of building materials such as ready mixed concrete reached 481.85 tons—— Since Nanjing became one of the six pilot cities for national government procurement to support green building materials and promote building quality improvement in 2020, the project leader of a maternal and child health care hospital has issued a number of policies to promote green building materials in new government procurement projects such as hospitals, schools, complexes and affordable housing, Set up the system framework of green building materials pilot work: study and formulate the Technical Requirements for Nanjing Municipal Government to Purchase Green Building Materials (the first batch), determine the product category, scope and acceptance standard of green building materials, and specify and index the concept of green building materials.

Among them, for commercial housing projects that adopt precast buildings, the precast assembly rate of single building is not less than 50% and the finished housing is delivered, the Pre sale License of Commercial Housing can be handled in advance when the foundation construction is completed, precast parts are assembled and installed.

As a municipal pilot project of government procurement to support green building materials, we have comprehensively promoted the use of various green building materials in the construction process.

The investment in precast parts and components shall be included in the total investment in project construction and included in the progress measurement.

The bottom chord reinforcement of truss reinforcement is considered as load-bearing reinforcement when reinforcement of standard precast composite floor slab is provided, which has good economy on the premise of meeting the requirement of less reinforcement.

After standardized calculation, the steel consumption of the project can be reduced by 7.4%, and the use of precast components such as single-layer interior wall of the model can also be reduced, effectively improving production efficiency and reducing costs—— In May 2022, the person in charge of an archive project officially implemented the Technical Guidelines for Standardized Design of Precast Components of Nanjing Precast Residential Buildings (Trial).

The guideline focuses on the standardized design technology research of concrete composite floor slab, precast stair slab and precast shear wall slab, forming a standardized design and production system for precast buildings, establishing a standardized parts library, realizing the unification of standardization and diversification, with universality, standardization and operability: realizing the operability of standardization of basic functional units in the early stage of project construction, especially in the building scheme stage, It can guide the standardized design of the building scheme and avoid unreasonable separation of precast components in the later period.

The pressure of cash flow is small, and we are more willing to develop precast housing—— In recent years, the person in charge of a commercial housing project has issued more than 20 related policies, including the Implementation Opinions on Further Promoting the Development of Assembled Buildings in Nanjing, which clearly put forward supporting policies and measures in terms of administrative approval, incentive guidance, financial subsidies, industrial support, etc.

Through the introduction of technical guidelines for standardized design of precast components in precast residential buildings, our city has provided strong technical support for the development of precast buildings, realized the serialization of main dimensions of precast components, and effectively guided large-scale production and application.