The ultrasonic evaluation of in place fracture critical bridge elements has become of greater importance with the ageing of the infrastructure system. Various written practices were reviewed in the process of estagblishing a written procedure to assure that the areas of interest could be examined with repeatable and reliable results. This work was sanctioned by the Michigan Department of Transportation and was primarily focused on the inspection of bridge pin support assemblies and electroslag welds which were incorporated into the structures, prior to the moratorium on this prcess in the 1970's. Mr. James Culp, of the Michigan Department of Transportation, published a ocument titled "Fracture Toughness and Fatigue Properties of Steel Plate Butt Joints Welded by Submerged Arc and Electroslag Welding Procedures" in May of 1976. This study was completed in cooperation with the Federal Highway Administration and was a comparison of the phasical and mechanical properties acieved by use of the two different processes. The mechanical properties achieved by use of the two different processes. The conclusion was that the eledctroslag process could reduce welding time by 50
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