I-280 BRIDGE - Steel fractures discounted in crane collapse By MIKE WILKINSON and ROBIN ERB
However, Dr. Fisher said the finding does not mean that steel failure has been totally ruled out.
Lehigh engineers have not yet studied a portion of the drive leg of the truss that was sent there for study, he said. The drive leg is considered a critical portion of the truss because of its role in moving the truss from one pier span to the next. The truss was in the process of being moved when it collapsed Feb. 16. The collapse claimed the lives of four men and injured four others.
Fru-Con Construction Corp., the bridge's contractor, acknowledged this week that it is reviewing the quality of the steel used by an Italian firm that made the failed truss. A second truss remains intact at the project's site, although it has not been used since the accident and won't be until it is ruled safe.