Spot Painting to Extend Highway Bridge Coating Life: Volume 1: Guidance (2018) / Chapter Skim
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NCHRP Project 14-30 4 2.0 OPPORTUNITIES TO USE SPOT PAINTING Bridge steel is composed of a variety of shapes which makes uniform coating application difficult, typically leading to insufficient coating thicknesses of one or more coats. Problematic features for painting include edges, faying surfaces, re-entrant corners, and fasteners.
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NCHRP Project 14-30 5 Bridge macro-environments refer to the conditions in which a bridge is situated (e.g., marine, inland, rural, urban and industrial)
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NCHRP Project 14-30 6 application of new coatings (removal and replacement)
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NCHRP Project 14-30 7 Spot Painting Spot painting is a coating repair option used to address localized coating failures and corrosion. It can employ a range of surface preparation methods and coatings.
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NCHRP Project 14-30 8 decisions. Those assessments can be sufficient in scope to provide information necessary to plan and perform follow-up maintenance painting work resulting from agency selection of a maintenance painting option.
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NCHRP Project 14-30 9 removal and replacement may be suitable. 2.3 Coating Decision Making Circumstances influencing which option is selected include: 1)
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