Arizona Bridge Collapse Will Lead to New Shoring Rules

摘要

A mysterious Aug. 9 bridge collapse in Mesa, Ariz., resulting from "lateral instability" has prompted the Arizona Dept. of Transportation to update its construction specifications to require temporary bracing during bridge construction. A 122-page report by CTL Group, a Skokie, Ill.-based investigative consultant, blames "a number of factors adding together in a critical combination" as the reason for a 114-ft-long bridge section under construction to fall.