几年来无锡地区基建战线的广大工人、千部和技术人员,组成“三结合”小组,对过去的“重盖”系统进行改革,以构件防水,代替二毡三油卷材屋面。自1968年开始使用非预应力单肋板,1970年改用预应力单肋板,几年来共建成了单肋板构件防水屋面13万平方米。预应力单肋板比大型屋面板节省混凝土29.7%,节省钢材43.5%,(以每平方米投影面积计),并可省去券材防水等复杂工 Over the past few years, the vast number of workers, the Ministry of Construction, and the technical staff of the infrastructure construction line in Wuxi have formed a “three-in-one” team to reform the past “heavy cover” system, replacing them with waterproof components instead of two felt and three oil coiled roofs. . Since 1968, non-prestressed single ribs have been used. In 1970, prestressed single ribs were used. In the past few years, a total of 130,000 square meters of single ribbed waterproof roofs have been built. The prestressed single ribbed slab saves 29.7% concrete, saves 43.5% of steel, and (in terms of projected area per square meter), and eliminates the need