但他指出，无论是屋瓦还是基于沥青材料的盖屋板，多数的屋顶的生命周期都约为20 - 25年。
But he points out that most roofs, whether tile or asphalt-shingle, have a life span of 20 to 25 years.
虽然保留了屋盖结构，但是碎石铺砌的房顶替换成常规屋顶，利用了铅锡镀不锈钢材料。
While the roof structure was retained, the ballast roofing was replaced with standing seam, terne coated stainless steel.
介绍了深圳游泳跳水馆钢屋盖结构设计，包括结构布置、带斜拉桅杆空间桁架的计算、节点构造、材料选用、防火设计以及结构涂装等。
The structural layout and calculation method of space truss with inclined rod and mast, joint construction, material selection, fire proof design a nd coating selection etc.
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