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Appendix A of the AISC Specification for Structural Joints Using High Strength Bolts published by the Research Council on Structural Connections describes the testing methods to determine the slip coefficient of coatings used in bolted connections.
Appendix A of the AISC Specification for Structural Joints Using High Strength Bolts published by the Research Council on Structural Connections describes the testing methods to determine the slip coefficient of coatings used in bolted connections. This paper describes the importance of establishing the slip coefficient of faying surfaces and presents the “soup‐to‐nuts” process associated with testing and certifying coatings used in slip‐critical connections ‐ from test panel fabrication to surface preparation, coating application (including thinning, thickness and curing variables), selection of mating surfaces, testing for resistance to slip and tension creep, and data reporting, including A, B and C classifications. Data from various generic coating types previously tested is presented, and research needs are described. Finally, the importance of application and curing of the coating in the shop or field according to the variables employed during testing and certification is reinforced.
The coatings industry is very familiar with shot/grit blasting as a mechanical means of surface preparation. Over the years, operators have worked with manual and automatic blast equipment with its associated dust collection arrangements. As with every manufacturing process, operating costs are very critical in this highly competitive industry. Therefore, coaters are always on the lookout for ways to tune their process and increase productivity.
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This paper will explore the concept of a “Standard of Care” as applied to coating inspection on industrial coatings projects. Establishing a “Standard of Care” for coating inspection sets an expectation for those providing, procuring or otherwise interacting with inspectors on an industrial coatings job.
The author will present on the various generic coatings technologies available for lining concrete and discuss the advantages and disadvantages of each one. Discussion will include epoxy, polyurethane and polyurea technologies. The goal of the presentation will be to provide some guidance to the attendees on when is the right application to select each technology as part of a specification.