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室外消防楼梯尺寸设计都有哪些规范？

室外消防楼梯尺寸设计都有哪些规范？

浏览：54次 | 提问时间： 07-10 09:22

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子当归 07-10 09:22

建筑设计防火规范(2006)第7.4.5条：
室外楼梯符合下列规定时可作为疏散楼梯：
1   栏杆扶手的高度不应小于1.1m，楼梯的净宽度不应小于0.9m；
2   倾斜角度不应大于45°；
3   楼梯段和平台均应采取不燃材料制作。平台的耐火极限不应低于1.00h，楼梯段的耐火极限不应低于0.25h；
4   通向室外楼梯的门宜采用乙级防火门，并应向室外开启；
5   除疏散门外，楼梯周围2.0m内的墙面上不应设置门窗洞口。疏散门不应正对楼梯段。
7.4.6   用作丁、戊类厂房内第二安全出口的楼梯可采用金属梯，但其净宽度不应小于0.9m，倾斜角度不应大于45°。丁、戊类高层厂房，当每层工作平台人数不超过2人且各层工作平台上同时生产人数总和不超过10人时，可采用敞开楼梯，或采用净宽度不小于0.9m、倾斜角度小于等于60°的金属梯兼作疏散梯。

与你温情 07-10 09:31

楼中楼楼梯尺寸设计规范：
1、室内台阶宜150×300；室外台阶宽宜350左右，高宽比不宜大于1：2.5。
2、住宅公用楼梯踏步宽不应小于0.26M，踏步高度不应大于0.175M   。
3、住宅梯段宽度不应小于1.1M(6层及以下一边设栏杆的可为1.0M)，净空高度2.2M。

人生几何 07-10 09:39

1 楼梯间应能天然采光和自然通风，并宜靠外墙设置
2 楼梯间内不应设置烧水间、可燃材料储藏室、垃圾道；
3 楼梯间内不应有影响疏散的凸出物或其它障碍物；
4 楼梯间内不应敷设甲、乙、丙类液体管道；
5 公共建筑的楼梯间内不应敷设可燃气体管道；
6 居住建筑的楼梯间内不应敷设可燃气体管道和设置可燃气体计量表。当住宅建筑必须设置时，应采用金属套管和设置切断气源的装置等保护措施。

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