地上建筑可以借用相邻防火分区的楼梯作为第二个疏散出口吗？

规范里只写了地下可以借用相邻防火分区的门作为第二出口，地上的可不可以？

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阳明心 23-11-03

考虑到三、四级耐火等级的建筑，不仅建筑规模小、建筑耐火性能低，而且火灾蔓延更快，故本规范不允许三、四级耐火等级的建筑借用相邻防火分区进行疏散。