防排烟设施是高层民用建筑保 障人民生命财产安全不可缺 少的消防安全设施，但由于部 分设计、施工人员对防排烟设施的结构、作用、性能缺乏了解，对国家规范标 准理解不透彻，往往导致在设计、施工中存在一些问题，主要表现在以下几个 方面： Ｓ一、自然排烟设施达不到排烟目 Smoke-proof facilities are indispensable fire-safety facilities for high-rise civil buildings to protect people’s lives and property. However, due to the lack of understanding of the structure, function and performance of smoke-exhaust facilities by some design and construction workers, Resulting in some problems in the design and construction, mainly in the following areas: S First, the natural smoke exhaust facilities reach the smoke head