Zhejiang Prefabricated Housing Standards

The main standards currently available for reference for prefabricated housing in Zhejiang include the 'Quality Management Standard for Prefabricated Concrete Components in Prefabricated Buildings (Draft for Approval)', while T/UNP 702—2025 has been abolished. Here is a detailed explanation:

T/UNP 702—2025 'Technical Specification for Concrete Shear Wall Structures in Prefabricated Houses'
This standard is a group standard formulated and made public by relevant units, with a publication date of August 1, 2025. Its content primarily focuses on the concrete shear wall structures of prefabricated houses, covering technical requirements for design, construction, and acceptance. However, this standard has been voluntarily abolished by the enterprise, meaning its technical clauses are no longer used as current norms, and relevant projects should avoid directly citing the content of this standard.

'Quality Management Standard for Prefabricated Concrete Components in Prefabricated Buildings (Draft for Approval)'
This standard is compiled by units such as Zhejiang Building Materials Group Co., Ltd. and is a local norm actively promoted by the Zhejiang Provincial Housing and Urban-Rural Development Department. Its compilation background stems from Zhejiang's demand for high-quality development in prefabricated buildings, aiming to unify standards for the production, transportation, installation, and acceptance of prefabricated concrete components. This standard was open for public review from July 9 to July 24, 2026. If approved after the public review period, it will become an important basis in the field of prefabricated housing in Zhejiang. Its core content may include:

1. Component Production Requirements: Clarifying standards for raw material quality, production process control, and finished product testing, such as key indicators like concrete strength and steel bar cover thickness.
2. Transportation and Storage Specifications: Stipulating the fixing methods, stacking layer limits, and moisture-proof and sun-proof measures for components during transportation to reduce transportation damage.
3. Installation and Acceptance Standards: Refining the positioning of components, construction of connection nodes, and the overall structural safety acceptance process to ensure construction quality meets design requirements.

Currently, there are no other publicly available provincial or national standards in the field of prefabricated housing in Zhejiang. Enterprises and practitioners need to closely monitor the subsequent approval developments of the 'Quality Management Standard for Prefabricated Concrete Components in Prefabricated Buildings (Draft for Approval)' and promptly adjust their design and construction plans. At the same time, for the abolished T/UNP 702—2025, it is necessary to thoroughly clean up old versions of the documents to avoid compliance risks caused by misuse.