在1967年文化大革命期间,我们学习了全国各兄弟单位的改革肥梁胖柱的经验后,结合本地区情况,改革过去造价高,用料多,构件重的9～15米跨屋面大梁,设计试验了两榀9米跨之薄腹三铰拱。通过破坏试验和中间生产,在1969年后较大面积地使用这种薄腹三铰拱。目前已建成了约4万平方米的工业厂房屋盖(是用以支承1.5×6米屋 During the Cultural Revolution of 1967, after studying the experience of reforming Fei Liangpai pillars of all brothers in the country, we combined the local conditions to reform the past 9 to 15 meters across the roof girder with high cost, heavy materials, and heavy components. Two-and-a-half-metre-span three-hinged arches were tested. Through the destruction test and intermediate production, this kind of thin three-hinged arch was used after 1969. At present, about 40,000 square meters of industrial factory building covers have been built (to support 1.5 x 6 meters of housing