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<br />560-11.6 Protection of Adjacent Surfaces: Protect all surfaces and working
<br />mechanisms not intended to be coated, during the application of coatings. Clean surfaces
<br />that have been contaminated with coatings until all traces of the coating has been
<br />removed. Do not allow material from cleaning and coating operations to be dispersed
<br />outside the work site.
<br />560-11.7 Inaccessible Surfaces: Coat all surfaces that will become inaccessible
<br />after fabrication, erection, or installation.
<br />560-11.8 Sealing/Caulking: Completely seal the perimeter of all faying surfaces,
<br />cracks and crevices, joints open less than 1/2 inch [13 mm], and skip-welded joints. Apply
<br />the sealant to the joint following the coating manufacturer's recommendations. Ensure the
<br />sealant/caulking bead has a smooth and uniform finish and is cured according to the
<br />sealant manufacturer recommendation prior to the overcoat application.
<br />560-11.9 Thickness of Coats: Apply coatings to the thickness as identified by the
<br />manufacturer's technical data requirements. Do not allow any portion of the coating films
<br />to be less than the specified minimum film thicknesses. Ensure that the total minimum film
<br />thickness for any combination of coats equals the sum total of the averages of the
<br />specified thickness range of the individual coats. Achieve the total minimum film thickness
<br />before the application of the finish coat.
<br />After application of each coat of coating, thoroughly inspect the surfaces.
<br />Take film thickness in accordance with SSPC -PA2. When the film thickness is deficient
<br />correct the deficiency in accordance with manufacturer's recommendations to achieve the
<br />appropriate thickness and retest the area. Inspect the finish and DFT of each applied
<br />coating for compliance prior to the application of successive coats.
<br />560-11.10 Coating Drying, and Curing: Follow the coating manufacturer's
<br />recommended drying and curing times for handling, recoating, and top coating. Meet the
<br />coating manufacturer's technical data requirements for testing the coating for proper
<br />curing before handling and shipping. Meet the requirements of ASTM D 4752, when the
<br />manufacturer's technical data sheet does not have a specified cure test.
<br />Verify the final cure of water-based coatings in accordance with
<br />ASTM D 4752, but water must be substituted as the solvent.
<br />560-11.11 Coating Finish: Apply each coat free of runs, sags, blisters, bubbles, and
<br />mud cracking; variations in color, gloss, or texture; holidays, excessive film buildup, foreign
<br />contaminants and dry overspray. Ensure each coat of applied material is clean, dry, cured,
<br />and free of surface contaminants prior to the application of the next successive coat.
<br />Check for missed areas or pinholes in accordance with manufacturer's recommendations.
<br />On rough or pitted surfaces, it may be necessary to apply a film thickness in excess of the
<br />normal manufacturer recommended coating thickness to obtain acceptable coverage.
<br />560-11.12 Coating Welded Areas: After cleaning the area, apply primer to achieve
<br />a DFT per manufacturer's recommendations.
<br />
<br />560-12 Sequence of Coating.
<br />560-12.1 Shop Coating: Perform all work in an area capable of protecting the steel
<br />and applied coating from wind, weather, dust and direct sunlight. Ensure that all coated
<br />surfaces are protected from damage. Repair all damaged coatings in accordance with
<br />SSPC-PA 1 and/or the coating manufacturer's recommendations. Repairs to the topcoat
<br />must result in an acceptable, uniform gloss and color for visible surfaces. The Engineer will
<br />have final authority concerning the coating's uniformity and acceptable appearance. Handle
<br />steel members with care to minimize damage to or contamination of the coating.
<br />
<br />09/09
<br />
<br />01000-133
<br />
<br />03-4122.F
<br />
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