The latest update on materials testing is in line with the NTSB’s previous report dated Aug. 9, 2018, in which the agency indicated that there seemed to be no sign of flaws in the bridge material. The August report also included an extensive photographic account of cracks at what appears to be the problem area of the bridge — the north end. Photos of cracks at or near diagonal member 11 and vertical member 12 show the development of what were minor cracks before the span’s installation. Fissure-like gaps developed where the structure is presumed to have failed.
