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民用建筑设计防火规范是怎样的？

民用建筑设计防火规范是怎样的？

浏览：57次 | 提问时间： 07-10 08:54

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Melody没了你 07-10 08:55

你好；根据我国国情，并参照其他国家的标准，《高层民用建筑设计防火规范》把高层民用建筑耐火等级分为一、二级；《建筑设计防火规范》分为一、二、三、四级，一级最高，四级最低。各耐火等级的建筑物除规定了建筑构件最低耐火极限外，对其燃烧性能也有具体要求，因为具有相同耐火极限的构件若其燃烧性能不同，其在火灾中的情况是不同的。按照我国国家标准《建筑设计防火规范》，建筑物的耐火等级分为四级。建筑物的耐火等级是由建筑构件(梁、柱、楼板、墙等)的燃烧性能和耐火极限决定的。一般说来：　一级耐火等级建筑是钢筋混凝土结构或砖墙与钢混凝土结构组成的混合结构；二级耐火等级建筑是钢结构屋架、钢筋混凝土柱或砖墙组成的混合结构；三级耐火等级建筑物是木屋顶和砖墙组成的砖木结构；四级耐火等级是木屋顶、难燃烧体墙壁组成的可燃结构。

朽年 07-10 09:03

建筑防火规范中没有低层建筑的概念。多层建筑见《建筑设计防火规范GB   50016--2006》 1.0.2   本规范适用于下列新建、扩建和改建的建筑：
九层及九层以下的居住建筑(包括设置商业服务网点的居住建筑)；建筑高度小于等于24m的公共建筑；建筑高度大于24m的单层公共建筑； ......
高层建筑见《高层民用建筑设计防火规范GB   50045-95(2005年版)》 1.0.3   本规范适用于下列新建、扩建和改建的高层建筑及其裙房： 1.0.3.1
十层及十层以上的居住建筑(包括首层设置商业服务网点的住宅)； 1.0.3.2   建筑高度超过24m的公共建筑。《民用建筑设计通则GB   50352—2005》中对建筑的划分为： 3．1．2   民用建筑按地上层数或高度分类划分应符合下列规定：
1   住宅建筑按层数分类：一层至三层为低层住宅，四层至六层为多层住宅，七层至九层为中高层住宅，十层及十层以上为高层住宅；
2   除住宅建筑之外的民用建筑高度不大于24m者为单层和多层建筑，大于24m者为高层建筑(不包括建筑高度大于24m的单层公共建筑)；
3   建筑高度大于1OOm的民用建筑为超高层建筑。

他是太阳深拥必伤 07-10 09:11

遵循国家有关基本建设的方针政策，贯彻“预防为主，防消结合”的消防工作方针，深刻吸取近年来我国重特大火灾事故教训，认真总结国内外建筑防火设计实践经验和消防科技成果，深入调研工程建设发展中出现的新情况、新问题和规范执行过程中遇到的疑难问题，认真研究借鉴发达国家经验，开展了大量课题研究、技术研讨和必要的试验，广泛征求了有关设计、生产、建设、消防监督、研究和教学等单位意见，最后经审查定稿。

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