南京市新宁砖瓦厂的广大职工,运用毛主席的光辉哲学思想,坚持实践第一的原则,反复实验,于1969年试制成功一种新型屋面结构材料——拱壳砖。拱壳砖又名挂钩砖,一端有钩,另一端带槽,利用砖与砖的钩挂悬砌,不用模板支撑,即可砌筑砖拱或砖薄壳屋面。这种屋面,既不需要大梁、屋架和檩条,又不需要起重吊装机械,自重轻,内部空间 Nanjing Xinning brick factory workers, the use of Chairman Mao’s glorious philosophy, adhere to the principle of the practice of the first, repeated experiments, in 1969 trial success of a new type of roofing material - arch shell brick. Arched shell brick, also known as hook brick, one end of the hook, the other end with groove, the use of brick and brick hook hanging hanging, without template support, brick masonry or brick can be masonry roof. This roof, neither the beams, roof truss and purlins, do not need lifting machinery, light weight, interior space