结构危机 meaning in English

structural crisis

Caltrans officials earlier on thursday began emergency structural inspections of 69 bridges across the state , many of them among the nearly 3 , 000 bridges that have been classified as " structurally deficient , " the same rating held by the collapsed minneapolis bridge
交通运输处周四一早就开始对横过这座城市的69座桥进行测查，它们中的一大部分被列为结构危机桥，和明尼阿波利斯坍塌的桥等级相同。