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560 -12.2 Field Coating: Field coating of steel members may occur on the ground <br />before erection or after erection, provided any damaged areas are touched up with the <br />same number of coats and coating materials. Apply the finish coat after erection. <br />Do not apply the finish coating until all concrete work is completed. Ensure <br />the surface is clean and free of any foreign matter prior to applying the final coat. <br />560 -13 Touchup and Repair of Coatings. <br />Clean and coat all field connections, welds or rivets, and bolts, and all damaged or <br />defective coating and rusted areas in accordance with 560 -7 and 560 -11. Ensure all <br />repairs are in accordance with the manufacturer's recommendations. <br />560 -14 Coal Tar -Epoxy Coating of Permanent Bulkhead Sheet Piles and H Piles. <br />560 -14.1 Shop Coating: Take appropriate measures to insure the piles and coatings <br />are protected from wind, weather, dust and direct sunlight. <br />560 -14.2 Surface Preparation: Immediately before coating, abrasive -blast the steel <br />to a near -white condition at least equal to the SSPC -SP 10. The average profile depth is <br />1.5 mils [40 µm] minimum. Re -blast piles not coated immediately following surface <br />preparation to the original blast standards before coating application. Ensure that all <br />surfaces to be coated are completely dry and free of any contamination at the time of <br />coating. <br />560 -14.3 Materials: Use an inorganic zinc and a Type M coal tar -epoxy coating <br />listed on the Qualified Products List. <br />560 -14.4 Application of Coating: Apply the inorganic zinc in accordance with this <br />Specification. Apply the coal tar -epoxy in accordance with the following specific <br />requirements: <br />(1) Apply the coal tar -epoxy system two coats. The time interval between <br />the first coat and the second coat will be in strict accordance with the coating <br />manufacturer's published specifications. Apply the first coat to yield a dry film thickness of <br />8 to 10 mils [200 to 250 µm]. Apply the second coat to attain a total dry film thickness of <br />the two coats is between 16 and 20 mils [400 and 500 I-rm], For Sheet Piles, give the <br />inside portion of the interlock claw and the interlock ball a single coat that will yield a dry <br />film thickness of 2 to 4 mils [50 to 100 µm]. Build up and puddling of the coating in these <br />areas is not permitted. <br />(2) Ensure that no portion of the coating is less than the specified minimum <br />film thicknesses. The total minimum film thickness for any combination of coats will be the <br />sum total of the averages of the specified thickness range of the individual coats. <br />(3) After applying the coating on the steel piles, the Engineer will thoroughly <br />inspect the surfaces and make film thickness measurements at the approximate rate of one <br />for each 25 ft2 [2.25 m2] of area unless deficient thickness is found. In this case, the rate <br />of sub - measurements will be increased as required to determine the extent of the deficient <br />area. <br />560 -15 Maintenance Coating. <br />560 -15.1 Surface Preparation: Prepare all surfaces including any components to be <br />coated per this Specification and in accordance with SSPC -SP 10 to remove corrosion, <br />weld slag, and existing coating edges or any foreign material. When sound portions of the <br />original coatings are to be left in place, remove all loose, cracked, brittle, and non - adherent <br />coating, and feather back the edges of all existing coating to sound material. When any <br />March 2007 01000 -134 03- 4122.D <br />L i <br />