Specifications Vol. II - Laserfiche WebLink

Home Browse Search

.., . II II 560-12.2 Field Coating: Field coating of steel members may occur on the ground before erection or after erection, provided any damaged areas are touched up with the same number of coats and coating materials. Apply the finish coat after erection. Do not apply the finish coating until all concrete work is completed. Ensure the surface is clean and free of any foreign matter prior to applying the final coat. . . ,., . 560-13 T ouchup and Repair of Coatings. Clean and coat all field connections, welds or rivets, and bolts, and all damaged or defective coating and rusted areas in accordance with 560-7 and 560-11. Ensure all repairs are in accordance with the manufacturer's recommendations. II . . 560-14 Coal Tar-Epoxy Coating of Permanent Bulkhead Sheet Piles and H Piles. 560-14.1 Shop Coating: Take appropriate measures to insure the piles and coatings are protected from wind, weather, dust and direct sunlight. 560-14.2 Surface Preparation: Immediately before coating, abrasive-blast the steel to a near-white condition at least equal to the SSPC-SP 10. The average profile depth is 1.5 mils [40 11m] minimum. Re-blast piles not coated immediately following surface preparation to the original blast standards before coating application. Ensure that all surfaces to be coated are completely dry and free of any contamination at the time of coating. 560-14.3 Materials: Use an inorganic zinc and a Type M coal tar-epoxy coating listed on the Qualified Products List. 560-14.4 Application of Coating: Apply the inorganic zinc in accordance with this Specification. Apply the coal tar-epoxy in accordance with the following specific requirements: (1) Apply the coal tar-epoxy system two coats. The time interval between the first coat and the second coat will be in strict accordance with the coating manufacturer's published specifications. Apply the first coat to yield a dry film thickness of 8 to 10 mils [200 to 250 ~Lm]. Apply the second coat to attain a total dry film thickness of the two coats is between 16 and 20 mils [400 and 500 11m]. For Sheet Piles, give the inside portion of the interlock claw and the interlock ball a single coat that will yield a dry film thickness of 2 to 4 mils [50 to 100 11m]. Build up and puddling of the coating in these areas is not permitted. (2) Ensure that no portion of the coating is less than the specified minimum film thicknesses. The total minimum film thickness for any combination of coats will be the sum total of the averages of the specified thickness range of the individual coats. (3) After applying the coating on the steel piles, the Engineer will thoroughly inspect the surfaces and make film thickness measurements at the approximate rate of one for each 25 ft2 [2.25 m2] of area unless deficient thickness is found. In this case, the rate of sub-measurements will be increased as required to determine the extent of the deficient area. " . .., . ..., . ,., .. ..., . ..., . 1"'"1 . ,.., ,.., . .-. . .., . 560-15 Maintenance Coating. 560-15.1 Surface Preparation: Prepare all surfaces including any components to be coated per this Specification and in accordance with SSPC-SP 10 to remove corrosion, weld slag, and existing coating edges or any foreign material. When sound portions of the original coatings are to be left in place, remove all loose, cracked, brittle, and non-adherent coating, and feather back the edges of all existing coating to sound material. When any . II ,..., . .., 09/09 01000-134 03-41 22.F .