Hours before a pedestrian bridge collapsed at Florida International University last year, engineers said cracks in the structure didn't pose a safety concern, according to an Occupational Safety and Health Administration report.
원문출처 : https://www.cnn.com/2019/06/12/us/fiu-bridge-collapse-ignored-cracks/index.html
원문출처 : https://www.cnn.com/2019/06/12/us/fiu-bridge-collapse-ignored-cracks/index.html