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预应力混凝土V形折板(以下简称折板)的特点是将屋架、屋面板和防水层构成了统一的构件。结构重量轻、刚度大、便于预制安装,有利于工厂化生产。造型美观并大大减少屋面构件类型和数量,技术经济指标也比较好,比一般钢筋混凝土结构可节约钢材50～80％,混凝土折算厚度3.5～4.7厘米(6～18米跨度),可节约水泥40～50％,造价降低18％左右。我局从1973年开始采用至今,已建工程的覆盖面积约4万余平方米,其中有货棚、仓库、厂房、机车中检棚、汽车房、俱乐部、单身宿舍等。跨度多为9～18米,最大达21米。三年米,一般反映较好。现将设计、施工及使用中的一些情况简介如下。
Pre-stressed concrete V-shaped folding plate (hereinafter referred to as the folding plate) is characterized by the roof truss, roof panels and waterproof layer constitute a unified component. Light weight structure, stiffness, easy to prefabricated installation, is conducive to industrial production. Beautiful appearance and greatly reduce the types and number of roofing components, technical and economic indicators are also better than the average steel structure can save 50-80% of the steel, the concrete thickness of 3.5 to 4.7 cm (6 to 18 meters span), can save the cement 40 ~ 50%, reduce the cost of about 18%. Our office has been adopted since 1973, covering an area of about 40,000 square meters, of which there are sheds, warehouses, workshops, inspection booths in motorcycles, automobile rooms, clubs and single dormitories. Span for more than 9 to 18 meters, the largest up to 21 meters. Three years of rice, generally reflect better. Now the design, construction and use of some of the briefings are as follows.