Laserfiche WebLink
El� <br />I <br />it <br />N <br />r <br />H <br />l <br />H <br />I <br />I <br />f' <br />spilled material. Ensure the material is agitated as required by the manufacturer's technical <br />data requirements during application to maintain uniform suspension of solids. <br />560 -11 Application of Coatings. <br />560 -11.1 General: Train all coating personnel on the proper mixing and application <br />of the coatings, Specification requirements, material application characteristics, and <br />inspection criteria. Only personnel receiving this training may mix or apply coatings. Use <br />thinners and cleaners according to coating Manufacturer's technical data requirements. <br />Coating that lifts or curls after application must be removed and the area cleaned and <br />recoated, at no additional cost to the Department. <br />Apply a prime coating of a color that will be a definite contrast between the <br />coating and the dull gray appearance of the blasted steel surface immediately following the <br />cleaning and preparation of the surface and apply succeeding coats before contamination <br />of the previous coats occurs. When this is not possible or is impractical, inspect the <br />surface for any damage from contaminates, weather, or other exposure and repair as <br />necessary before application of the next coat. <br />Select intermediate and finish coat colors so that there is a definite contrast <br />between the coatings. Stripe coats may be tinted as necessary to assure proper coverage <br />and facilitate inspection. Apply the finish coating meeting Federal Standard, No. 59513, <br />Table VIII, Shade No. 36622, color designation, unless otherwise identified in the Contract <br />Documents. <br />Ensure that primer for faying (contact) surfaces of high strength bolted <br />connections (for slip - critical, frictional transfer of load) meets the Research Council on <br />Structural Connections (RCSC) requirements for a Class B rating, based on certified tests <br />by the coating manufacturer or applicator. <br />560 -11.2 Weather and Temperature Limitations for Field and Maintenance Coating: <br />Ensure the ambient weather conditions at the actual location of the work during surface <br />preparation and coating application operations are in accordance with coating system <br />manufacturer's recommendations. <br />Do not spray coating when the measured wind speed in the immediate <br />coating area is above 15 miles per hour [25 kilometers per hour]. Ensure the ambient air <br />temperature, relative humidity, and dew point and the surface temperature of the steel to <br />be coated are within limits recommended by the coating manufacturer. <br />Do not apply coatings when contamination from rainfall is imminent or when <br />the temperature or humidity is outside limits recommended by the coating manufacturer. <br />560 -11.3 Application Methods: Apply coatings per manufacturer's technical data <br />requirements. Application with brushes may be permitted for minor touchup of spray <br />applications and stripe coats in accordance with manufacturer recommendations. Adjust <br />spray equipment to produce an even, wet coat with minimum overspray. Apply coatings in <br />even, parallel passes, overlapping 50 percent unless otherwise recommended per <br />manufacturer's technical data requirements. <br />560 -11.4 Striping of Irregular Surfaces: Ensure complete coverage and proper <br />thickness on welds, corners, crevices, sharp edges, bolts, nuts, and rivets. <br />560 -11.5 Faying Surfaces: Prior to bolting; verify that the coating on the faying <br />surfaces is properly cured in accordance with ASTM D 4752 or the manufacturer's <br />requirements. Verify that the dry film thicknesses (DFT) and the temperature- adjusted cure <br />time for slip critical bolted faying surfaces are within the range validated by the coating <br />manufacturer. <br />March 2007 01000 -132 <br />03- 4122.D <br />