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隔火层

楼高67层的名铸,图中包括位于47楼的隔火层。

隔火层亦称避火层庇护层,是大厦,例如摩天大厦的设计细部,为求消防目的建造,有效果于阻隔火灾蔓延,亦可以供予人士在发生火灾时作为临时庇护用途。

香港

[编辑]

根据香港《消防条例》规定,住宅楼宇的楼层高达25层,发展商便要在楼层之间设有隔火层。但若建筑物高度在地上25至40层之间,则有关建筑物的天台可视作避火层[1]。而在实际应用上,住宅楼宇的避火层最多有两层。

现时地产发展商会将部分住宅项目的隔火层利用为空中花园,作为楼盘卖点,该楼是空气层通透无阻之空间,不设窗户外墙等,只有电灯照明,24小时灯火通明。及至少有一部消防升降机到达。建筑物的升降机门在正常操作时不应在避火层(如非作空中花园)开启,并应时刻锁上,直至在消防掣启动下自动开锁为止[1]。若用作空中花园,则所有升降机均可到达,但该层电梯大堂必须有双重防烟门(连自动上锁功能)保护。

摩天大厦的隔火层一般与机电层上下并置,但消防升降机未必会在避火层设有层站。

中国大陆

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在中国国标《民用建筑设计统一标准》(GB50352-2019),包括前标准《民用建筑设计通则》(GB 50352-2005),和《建筑设计防火规范》(GB 50016)中,也被归纳为设备层避难层(间)架空层,作为防火用途的避难层可在满足防火避难要求下兼作设备层,要求建筑高度超过100米的公共建筑必须设置避难层(间),并对避难层(间)的设置高度、设施布置等有相应要求。[2][3]

资料来源

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  1. ^ 1.0 1.1 防火安全. 香港消防处网站. 2012-07-19 [2012-08-15]. (原始内容存档于2021-05-03). 
  2. ^ 住房和城乡建设部关于发布国家标准《民用建筑设计统一标准》的公告. www.mohurd.gov.cn. [2024-03-05]. (原始内容存档于2024-03-27). 
  3. ^ GB 50016-2014 建筑设计防火规范(2018年版)_国家标准_天津市应急管理局. yjgl.tj.gov.cn. [2024-03-05]. 
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隔火层
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