大型商业建筑由于其结构特点,面临的一些消防问题包括中庭防火分区超大、疏散距离超长、疏散楼梯的出口设置在中庭等。文章通过分析NFPA101中对建筑中庭的要求和新相关建筑规范对步行街的要求,将中庭作为准安全区以解决上述问题,并提出具体措施。同时给出了楼梯借用中庭疏散时,合理的疏散宽度计算方法。 Due to its structural features, large-scale commercial buildings face some fire protection problems including oversized fire protection zones, long evacuation distances and exit of evacuation stairs set in the atrium. By analyzing the requirements of NFPA101 for atriums and the requirements of pedestrian streets in the new relevant building codes, the article uses the atrium as a quasi-safe zone to solve the above problems and proposes concrete measures. At the same time, given a staircase to borrow atrium evacuation, a reasonable method of calculating the evacuation width.