一、北京局基建处关于进一步推广预应力构件的决定北京局基建处为了推广使用预应力构件,曾于1972年12月成立了“构件改革小组”。该小组经过一年多的努力,提出了五种中小型预应力构件试用图和质量检验办法,完成了原定任务。为了进一步推广已编制的五种中小型预应力构件试用图,使预应力技术在更广泛的范围内应用,决定: I. The decision of the Beijing Bureau of Infrastructure to further promote the use of prestressed components In order to promote the use of prestressed components, the Beijing Bureau of Infrastructure established the “Component Reform Group” in December 1972. After more than one year of hard work, the team put forward five pilot drawings and quality inspection methods for small and medium-sized prestressed components and completed the original mission. In order to further promote the trial drawings of the five types of small and medium-sized prestressed components that have been prepared, the prestressed technology will be used in a wider range of applications. It is decided that: