Reso 2007-1103 - Laserfiche WebLink

Home Browse Search

c FE; H r Hl�� IL r u C L H �E il�„ II�II: 560 -11.6 Protection of Adjacent Surfaces: Protect all surfaces and working mechanisms not intended to be coated, during the application of coatings. Clean surfaces that have been contaminated with coatings until all traces of the coating has been removed. Do not allow material from cleaning and coating operations to be dispersed outside the work site. 560 -11.7 Inaccessible Surfaces: Coat all surfaces that will become inaccessible after fabrication, erection, or installation. 560 -11.8 Sealing /Caulking: Completely seal the perimeter of all faying surfaces, cracks and crevices, joints open less than 1/2 inch [13 mm], and skip - welded joints. Apply the sealant to the joint following the coating manufacturer's recommendations. Ensure the sealant /caulking bead has a smooth and uniform finish and is cured according to the sealant manufacturer recommendation prior to the overcoat application. 560 -11.9 Thickness of Coats: Apply coatings to the thickness as identified by the manufacturer's technical data requirements. Do not allow any portion of the coating films to be less than the specified minimum film thicknesses. Ensure that the total minimum film thickness for any combination of coats equals the sum total of the averages of the specified thickness range of the individual coats. Achieve the total minimum film thickness before the application of the finish coat. After application of each coat of coating, thoroughly inspect the surfaces. Take film thickness in accordance with SSPC -PA2. When the film thickness is deficient correct the deficiency in accordance with manufacturer's recommendations to achieve the appropriate thickness and retest the area. Inspect the finish and DFT of each applied coating for compliance prior to the application of successive coats. 560 -11.10 Coating Drying, and Curing: Follow the coating manufacturer's recommended drying and curing times for handling, recoating, and top coating. Meet the coating manufacturer's technical data requirements for testing the coating for proper curing before handling and shipping. Meet the requirements of ASTM D 4752, when the manufacturer's technical data sheet does not have a specified cure test. Verify the final cure of water -based coatings in accordance with ASTM D 4752, but water must be substituted as the solvent. 560 -11.11 Coating Finish: Apply each coat free of runs, sags, blisters, bubbles, and mud cracking; variations in color, gloss, or texture; holidays, excessive film buildup, foreign contaminants and dry overspray. Ensure each coat of applied material is clean, dry, cured, and free of surface contaminants prior to the application of the next successive coat. Check for missed areas or pinholes in accordance with manufacturer's recommendations. On rough or pitted surfaces, it may be necessary to apply a film thickness in excess of the normal manufacturer recommended coating thickness to obtain acceptable coverage. 560 -11.12 Coating Welded Areas: After cleaning the area, apply primer to achieve a DFT per manufacturer's recommendations. 560 -12 Sequence of Coating. 560 -12.1 Shop Coating: Perform all work in an area capable of protecting the steel and applied coating from wind, weather, dust and direct sunlight. Ensure that all coated surfaces are protected from damage, Repair all damaged coatings in accordance with SSPC -PA 1 and /or the coating manufacturer's recommendations. Repairs to the topcoat must result in an acceptable, uniform gloss and color for visible surfaces. The Engineer will have final authority concerning the coating's uniformity and acceptable appearance. Handle steel members with care to minimize damage to or contamination of the coating. March 2007 01000 -133 03- 4122.D �f