单选题:为保证消防安全,一级耐火等级的己.丙.丁类厂房地下室每个防火分区最大允许建筑面积分别为()m2

题目内容:

为保证消防安全,一级耐火等级的己.丙.丁类厂房地下室每个防火分区最大允许建筑面积分别为()m2 A.500500500
B.500500500
C.乙类不允许设置在地下室丙.丁类最大500
D.乙类不允许设置在地下室丙类最大500丁类最大1000

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【背景资料】 某普通办公楼底商35层,建筑高度为4m,标准层建筑面积为l000㎡,设有五部电梯(其中一部兼消防电梯),两

【背景资料】 某普通办公楼底商35层,建筑高度为4m,标准层建筑面积为l000㎡,设有五部电梯(其中一部兼消防电梯),两部防烟楼梯间作为疏散楼梯,其疏散宽度满

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