Pack Rust
Cross section loss of a steel girder due to pack rust corrosion is another defect that can be found in an FC bridge inspection. The pack rust occurs between two mating surfaces and is a volume of rust formed over the original steel. The pack rust may create localized distortion, and possibly cracking and loss of cross section.
Figure A and B shows 10 mm of pack rust that occurred between the bottom flange of the exterior steel girder and the bottom steel cover plate. As shown in Figure C, the pack rust between the bottom flange and the cover plate was removed during a painting project. Typically, caulking material is inserted into the cleaned areas to avoid further corrosion. Figure D shows the completed repair. These areas will be monitored for corrosion during the next FC bridge inspection cycles
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Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including works like roads, bridges, canals, dams, and buildings..........