THIS STORY HAS BEEN FORMATTED FOR EASY PRINTING

No evidence of bolt retests for much of tunnel ceiling

Tougher exams ordered in '99

By Scott Allen and Sean P. Murphy
Globe Staff / July 26, 2006

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Concerns over the number of failed bolts in the ceiling of the Interstate 90 connector tunnel prompted Big Dig officials to order more rigorous safety tests during its construction in late 1999, requiring each support hanger to be subjected to twice the weight crews had been using in earlier tests. (Full article: 973 words)

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