建筑防火通用规范（GB 55037-2022）第7.1.5条

在疏散通道、疏散走道、疏散出口处，不应有任何影响人员疏散的物体，并应在疏散通道、疏散走道、疏散出口的明显位置设置明显的指示标志。疏散通道、疏散走道、疏散出口的净高度均不应小于2.1m。疏散走道在防火分区分隔处应设置疏散门。

General Specification for Building Fire Protection (GB55037-2022), Article 7.1.5

There shall be no any objectsthat affect the evacuation of personnel at the evacuation passage, evacuationwalkway and evacuation exit, and obvious indication signs shall be set at theobvious positions of the evacuation passage, evacuation walkway and evacuationexit. The clear height of evacuation passage,evacuation walkway and evacuation exit shall not be less than 2.1m. Evacuationdoors shall be set at the partition of fire compartment in the evacuationwalkway.