文档介绍：耐火等级与耐火极限
of rural drinking water sources, protection of drinking water sources in rural areas by the end of th级耐久年限 15年以下适用于临时性建筑。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
　　关于确定建筑物的耐火等级和耐久年限：
　　对于新设计的房屋，应该是依据它的功能要求——包括建筑的高度和面积、对生命财产及政治影响程度来确定其级别，并按该级别的要求如楼梯电梯的设计要求、构件的燃烧性能和耐火极限、结构抗震要求等等来进行设计。
　　对已建成的或旧建筑，应该是对其主要构部件性能进行判别，对照相应规范要求确定。这可是估价师要掌握的本领。
GB50016-2006 建筑设计防火规范中关于防火等级的分类表
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
  

耐火极限
耐火极限对任一建筑构件按时间一温度标准曲线进行耐火试验，从受到火的作用时起，到失去支持能力或完整性被破坏或失去隔火作用时为止的这段时间，用小时表示。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sourc