This standard is managed by Chongqing Municipal Commission of housing and urban rural development, and Chongqing Construction Industry Association is responsible for the interpretation of specific technical contents.

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Relevant units: the technical standard for precast prestressed concrete foundation of tower crane is hereby approved as the local standard for engineering construction in our city, with the number of dbj50 / t-223-2022, Effective from June 1, 2022, the original technical specification for precast prestressed concrete foundation of tower crane dbj50 / t-223-2015 is repealed at the same time.

Notice on Issuing Technical Standard for precast prestressed concrete foundation of tower crane original text: housing and urban rural construction committees of all districts and counties (autonomous counties), construction bureaus of Liangjiang New Area, economic development zone, high tech Zone, Wansheng economic development zone and Shuangqiao economic development zone.

Original text and annex of the official website of Chongqing Municipal Commission of housing and urban rural development on March 17, 2022.