1070PAINTING EXISTING STRUCTURAL STEEL

1070.1DESCRIPTION—This work is surface preparation and coating of existing structural steel using a

three-coat system. This work includes removal of existing coatings from the entire structure or zones as indicated, cleaning, soluble salt remediation, treatment of pack rust areas, and application of the three-coat system.

1070.2MATERIAL—

finish coat paint system listed in Bulletin 15 and the Northeast Protective Coatings Committee (NEPCOAT) Qualified Products List B. Provide caulking and penetrating sealer produced by the manufacturer supplying the coating for use in pack rusted areas. Provide written confirmation from the coating manufacturer that the caulking and penetrating sealer are compatible with the coating system if used as specified. Verify the organic zinc rich primer has a Class B certification, certified within the last 7 years, from an AASHTO approved laboratory according to the Research Council on Structural Steel Connections (RCSC) Specification for Structural Joints Using High Strength Bolts Appendix A. If a NEPCOAT List B three-coat system is proposed, but is not listed in Bulletin 15, obtain acceptance of the coating system as specified in Section 106.02(a)2.b before shipment to the project. Obtain the coating system from one manufacturer. Do not mix components or coats from different systems of the same manufacturer or other manufacturers.

Engineer a minimum of 30 calendar days before beginning surface preparation or coating operations. Do not begin surface preparation or coating operations until submittals have been accepted. Include the following:

595A color number a minimum of 6-inch by 6-inch in size. If the color number indicates a finish other than semi-gloss, provide a semi-gloss finish coat. Do not obtain finish coat material until acceptance of the color and gloss level.

CMD.

• Provide Certificate of Testing from an AASHTO approved laboratory confirming the organic zinc rich primer has a Class B rating according to RCSC Specification for Structural Joints Using High Strength Bolts and has been tested within the last 7 years.

• For Bulletin 15 approved coating systems, certify as specified in Section 106.03(b)3 modified as follows: Submit a dated certification, Form CS -4171, from the manufacturer that each batch of the coating system meets specifications. Include in the certification , the product name for each coat of the system being supplied, and the production lot number of the batch being certified.

• If a non-Bulletin 15 approve d NEPCOAT List B three-coat system is chosen and accepted, certify the material as specified in Section 106.03(b)3. PennDOT Electronic Construction and Material Management System (eCAMMS) Test Report is to accompany each shipment to the project. The lot numbers on the eCAMMS Test Report are to match the lot numbers shipped to the project.

following: penetrating sealer, caulking, thinner/cleaners, soluble salt remover, and rust stain remover. Provide specific coating application instructions that list amount of thinning allowed including Volatile Organic Compounds ( VOC) if thinned at those levels; minimum/maximum cure to recoat and full cure intervals based on time, temperature , and relative humidity . Include manufacturer’s in formation for

determining recoat times and full cure times if the potential temperatures and relative humidity combinations are not listed on the PDS. If a conflict between the PDS or procedures and the specifications, the specifications will govern unless directed otherwise.

1070.3CONSTRUCTION—

106.03(b)2 to the Structure Control Engineer a minimum of 30 calendar days before beginning surface

preparation or coating operations. Include procedures for inspections , tests, and documentation as specified in Section 1070.3(d)9. If the temperature of the air, material, or surfaces inside of the containment are expected to drop below 40F before the coating dries to full cure , submit a cold weather QC Plan a minimum of 30 calendar days before beginning surface preparation or coatings operations detailing procedures for monitoring and controlling the environmental conditions inside of containment. The cold weather QC Plan is to include items such as equipment to be utilized, heat source, dehumidifi cation, cure times based on temperatures from the manufacturer, the number and location of temperature recording devices, and safety. When evaluating curing, time will be based on lowest recorded temperatures inside of containment. Do not begin surface preparation or coating operations until the QC Plan is accepted. Include the following with the QC Plan:

1.a. Cleaning, Painting, Penetrating Sealer and Caulking Installation Plans. Provide procedures for preparing and painting surfaces according to the requirements of this specification, including but not limited to the degree of surface cleanliness and surface profile to be achieved; abrasive type and size to be used; abrasive clean liness verification; processes and equipment to be used for cleaning and painting limited access areas; mixing and thinning; film thickness, coverage, and continuity of each coat; drying times, cleanliness between coats; and preparation of surfaces with ex tended times between coats (defined as 80% of the published maximum recoat time or as otherwise defined by the manufacturer) or that have been exposed to out of season weat her conditions. Include the equipment that will be used for cleaning and painting. Include the controls that will be exercised when applying coatings, especially zinc, with a roller or brush. Provide application and installation instructions for penetrating sealer and caulking, including but not limited to the minimum/maximum joint width and depth that can be caulked/sealed; proper size and type of backer rod, if needed; application in lifts, if needed; caulk dry times before painting, and other installation instructions from the manufacturer. Include procedures for the treatment of pack rust including pack rust removal from crevices/gap areas as specified in 1070.3(c)4 and the application of penetrating sealer, stripe coats, and caulking as specified in 1070.3(d)5. Provide coating repair procedures that comply with this specification and are approved by the coating manufacturer. Provide a plan for conducting inspections and tests required by this specification and other tests that may be needed to confirm work performed complies with this specification and coating manufacturer requirements. Include a list of instrumentation to be used and confirmation the instruments are calibrated , and accuracy is verified according to the manufacturer’s instructions. Include provisions for notifying the Representative when Hold Point inspections are reached and confirmation necessary repairs will be made and inspected. Provide samples of daily inspection reports. If non -published technical instruction, guidance, letters, or information is submitted, provide a submission from an authorized, technically responsible manufacturer representative with a statement affirming the product warranty will not be affected. Notify the Representative if a conflict between the manufacturer’s PDS, instructions or procedures and the contract specifications is identified. The contract specifications govern unless the manufacturer’s PDS, instructions or procedures are more stringent.

1.b Soluble Salt Remediation. Provide procedures for the detection and remediation of soluble salts and for recleaning and preparation of steel after remediation.

1.c Concrete Rust Remover. Provide procedures for removal of rust stains from concrete. Include application and removal of cleaner, alternate methods of removal such as pressure washing/blast cleaning, containment and disposal of the waste and wastewater.

1.d DEP Notification. Submit acknowledgment the regional office of the DEP was notified of the coating operations and is aware of the controls that will be exercised.

manufacturer at the Pre-Paint Meeting and as requested throughout operations.

preparation/coating operations after submittals have been accepted and a minimum of 14 calendar days before beginning operations. The following are required to attend: Prime Contractor Project Manager, Prime Contractor Superintendent, Coatings Contractor Foreman/Supervisor, Coatings Contractor Quality Control Inspector, Technical Representative from coatings manufacturer , Structure Control Engineer , Coatings Inspector, and other individuals designated by the Department.

preparation and coating work according to applicable Federal (OSHA), Environmental Protection Agency (EPA), State, and local (based on bridge location) safety regulations. Use scaffolding and rigging conforming to OSHA regulations that provide safe ready access for workers and inspection purposes. The contractor is responsible to identify confined spaces and conform to OSHA regulations if performing work in confined spaces. The contractor is the controlling employer as defined by OSHA. Protect pedestrian, vehicular, and other traffic on, under, and around bridge superstructures and substructures, as well as surrounding property and buildings against damage or disfigurement from all activities associated with the project work. Remove paint from surfaces not designated to receive coatings . Remove project debris daily. Clean and remove abrasive blast media found outside of containment immediately . Conduct final removal of all project debris upon completion of the operations. Repair damage resulting from the project work to the satisfaction of the Representative at no additional cost to the Department.

by surface preparation, paint spills or overspray, paint chips, dust, or other harmful materials as specified in Section 1072. Conform to the regulations of the Pennsylvania DEP, Pennsylvania Fish Commission, Army Corp of Engineers, EPA, and local regulatory agencies. If abrasive blasting permit is required, do not begin work until the Department receives and accepts documentation confirming an abrasive blasting permit was obtained . The Department will not extend the contract time for delays caused by a failure to make a timely submission of this acknowledgement. Conviction of a criminal summary complaint issued by the DEP may be cause for suspension of prequalification.

to allow proper visibility during cleaning, painting, and inspection activities according to SSPC Technology Guide 12. Provide a minimum illumination of 50 foot candles (538 lux) for inspection and 20 foot candles (215 lux) for surface preparation and coating application , including working platforms, access, and entryways. Provide a minimum illumination in general work areas of 10 foot candles (108 lux). Design and operate exterior illumination to avoid glare that interferes with traffic, workers, and pedestrians. Provide a light meter for Department use with readings in lux or foot candles to verify the adequacy of illumination.

not proceed with operations beyond the Hold Point until Representative QA inspections/observations are performed and acceptance is provided. Permission to proceed beyond a Hold Point without QA acceptance will be granted solely at the discretion of the Representative. The Representative has the right to reject work performed without QA inspection/observation and acceptance.

galvanized metal surfaces, unless indicated. Do not apply intermediate and finish coats to faying surfaces or surfaces that will be in contact with concrete. Coat those surfaces with organic zinc primer only including top flanges and existing shear studs to remain. If new shear studs are indicated for existing stringers, floor beams, or girders, apply primer to the top flange then remove the primer at each shear stud location before

installing. Install shear studs then spot prime shear stud welds and surrounding primer damaged by shear stud placement. All faying surfaces are considered slip critical unless indicated otherwise, and primer applied to those surfaces must meet the requirements as specified in Section 1070.2(a) including but not limited to, the dry film thickness and minimum curing requirements listed on the Class B slip coefficient /creep resistance test certification before assembly of the faying connection. If black bolts are used, assemble connection then blast clean and coat bolts with three -coat system. Repair, feather, and recoat all surrounding coatings damaged by over blast as specified in Section 1070.3(d)7. Do not coat utilities or associated utility hangers and brackets unless indicated or directed. Coat limited access areas as specified in Section 1070.3(c)11.

contaminants on steel according to SSPC-SP1 Solvent Cleaning before surface preparation. If contamination remains after surface preparation, re-clean according to SSPC -SP 1 before painting. If grease, oil, dust, dirt, drawing and cutting compounds , or similar contaminants become deposited on any coat that will receive another coat, remove according to SSPC-SP1 before the application of the subsequent coat. If the primer or intermediate coat is exposed to vehicular exhaust, remove all hydrocarbon residue before application of the subsequent coat. If the removal of the contaminants utilizes water, manage and dispose of the water as specified in Section 1072 . If water is used in the cleaning procedure, ensure surfaces, pockets, and corners are dry and clean before applying paint. Remove all flash rust resulting from the water cleaning process.

to remove contaminants such as soil, concrete spatter, and other foreign matter. If biodegradable cleaning solutions are submitted and accepted for use, follow with a freshwater rinse. Comply with the requirement for removal of soluble salts as specified in Section 1070.3(c)8.

existing and new weld spatter from newly installed steel. Grind resulting burrs smooth, including burrs around holes. Grind sharp edges, such as those created by cutting or shearing to an approximate 1/8 inch radius. Grind flame -cut steel to remove the hardened surface layer before blast cleaning. After surface preparation, inspect existing steel for thin, sharp edges (knife -edging). If present, grind /round edges to a minimum 1/16 inch radius. Grind laminations and slivers in the steel that become visible after blast cleaning operations flush with the surface and re -blast the ground area to obtain the specified anchor pattern and cleanliness.

loose pack rust by hand and power tool cleaning or by abrasive blast cleaning before production abrasive blast cleaning . Ensure pack rust is removed to a minimum of 1/4 inch below the edge(s) of the steel members and the remaining pack rust is tight if probed with a dull putty knife. Exercise extreme care to avoid nicking or gouging the steel during removal. If nicks or gouges occur, the Representative may suspend activities until appropriate adjustments are made to prevent a recurrence. Notify the Representative of steel perforation, deformed steel at joints, broken rivets, or other similar defects revealed during abrasive blast cleaning of heavily rusted areas. The Representative will advise how the areas are to be addressed.

locations considered by the Representative to be representative of existing surface conditions and structural characteristics. Additionally, provide two 12 inch by 12 inch by 1/4-inch-thick carbon steel test plates to the Representative before production blast cleaning. Blast clean test sections and test plates using the same equipment, materials, and procedures that will be used for the production blast cleaning. Once accepted by the Representative, photograph the test sections for use as a jobsite standard, but if a conflict occurs between the jobsite standard and the written SSPC definition of the degree of cleaning required, the written definition prevails. Seal the test plates in plastic or air-tight containers with desiccant to prevent rusting and use to verify the accuracy of the dry film thickness gauges. If the test plates exhibit signs of rusting, reblast. Additionally, the Representative will select a pack rusted test section. Clean, apply penetrating sealer, intermediate stripe coat, intermediate coat, caulk, and finish coat to pack rust test sections using the same equipment, materials, and procedures that will be used for production work. If galvanized or black nut/bolt assemblies are to be coated, the Representative will select a representative connection as a test area. Clean and paint the connection as specified using the same equipment, materials, and procedures that will be used for production work. Do not proceed with the production blast cleaning operations until the Representative accepts the surface preparation of each test section.

Cleaning. Utilize clean, oil-free dry compressed air for abrasive blast cleaning. Conduct blotter test(s) according to ASTM D4285 a minimum of one time each shift for each compressor system in use to verify the air supply is free of moisture and oil contamination. Conduct the tests in the presence of the Representative. If contamination is evident, make changes as necessary to achieve clean, dry, air and re-inspect all surfaces prepared since the last acceptable test.

properly sized to produce an angular, dense and uniform surface profile as specified in the PDS for the coating being applied . Measure the surface profile depth according to SSPC -PA 17 using ASTM D4417 Method B, depth micrometer or Method C, replica tape. If the profile is outside of the specified range, obtain different abrasives and completely re-blast the steel to achieve the specified profile. Use recyclable abrasives that are clean and dry to create the least amount of waste possible. Submit a technical data sheet from the recyclable abrasive manufacturer indicating the number of recycles possible with the material. Do not recycle abrasives beyond the manufacturer’s recommended limits. Acceptable recyclable abrasives are aluminum oxide, silicon carbide, zirconium aluminum oxide, and steel grit . Requests to use expendable one time use abrasives such as garnet or coal slag meeting the requirement of SSPC-AB 1 may be considered on a case -by-case basis. Submit request to use expendable, one-time use abrasives to the Structure Control Engineer. Do not use requested abrasive until accepted. Do not use silica sand. Use a reclamation system that removes fines, returns properly sized abrasive for reuse, and is equipped with dust collectors to ensure the discharge meets air quality requirements. Test the cleanliness of the recycled abrasive according to SSPC -AB 2 except complete tests for water soluble contaminants and oil content at the beginning of each work shift or as directed. If the abrasive fails the tests, promptly replace the abrasive and make changes to the equipment as necessary to achieve compliance. Reclean contaminated areas.

following levels:

Chloride < 7mg/cm2 FerrousIon < 10mg/cm2 Sulfate < 17mg/cm2

Conduct soluble salt tests across the structure according to NACE SP0716 with special attention to corroded and pitted areas. Use the cell method of SSPC Guide 15 to collect the samples. Conduct this testing after abrasive blasting. Provide the proposed method of soluble salt remediation in the QC Plan as specified in Section 1070.3(a)1. Include the process that will be used for recleaning the steel after testing. If the soluble salts are removed using wet methods, remove the resulting flash rust before applying the coating.

in conjunction with SSPC -SP 2, Hand Tool Cleaning to remove all grease, oil, dirt, dust, nut /bolt lubricant and other contaminants from nut/bolt assemblies (nuts, bolts and washers) before coating. Remove all lubricant wax/torquing compound , except slight discoloration from the dye is allowed to remain, if after cleaning, there is no color transfer when vigorously rubbed with a white cotton cloth. The acceptance criteria for these areas will be established when conducting the test areas as specified in Section 1070.3(c)5.

oil, grease, salts, or other foreign material from the surface. Pay specific attention to pocke ts and corners. Unless directed , conduct cleaning using standard methods , for example, bristle, fiber, or hair brushes; vacuuming; blowing with clean, dry, compressed air; or a combination thereof. If the paint contains lead or other toxic metals, use vacuums equipped with HEPA filtration. Blowing down with compresse d air or brushing is allowed only if performed within a ventilated containment with the ventilation system in operation as specified in Section 1072. Apply primer within 10 hours after the steel is cleaned. If the steel remains unpainted for longer than 10 hours, or if cleaned steel exhibits evidence of rust back, analyze for soluble salt contamination as specified in Section 1070.3(c)8. If soluble salts are present, remediate as specified in Section 1070.3(c)8. If soluble salts are not present, blast clean again before priming. Apply primer only after the Representative has accepted the prepared surface.

access areas such as inside box girder members or other irregularly shaped, complex configurations. Use short or angled blast nozzles, or other commercially available equipment as necessary, to properly clean the limited access areas. Limits are as indicated.

according to the accepted remediation method as specified in Section 1070.3(a)1.c and as directed. This can be by abrasive blasting to obtain a condition according to ASTM D4259, use of an acceptable concrete rust remover according to manufacturer’s recommendations, or alternate accepted method. If concrete rust remover is used, flush with water after application and contain as specified in Section 1070.3(a)1.c.

with concrete, apply caulk to the top and sides only. Allow downward facing or bottom crevices/gaps to remain uncaulked so moisture that may enter the crev ices/gaps can escape. Use approved caulking material only.

elements between 40F and 100F. Utilize a continuous temperature recording device to monitor storage temperatures. Should temperatures extend outside of the specified range, replace coatings at no additional cost to the Department. If the storage requirements of the manufacturer are more restrictive, comply with the more restrictive requirements.

and thin paints according to the PDS or according to the certificate of testing results for faying surfaces until solids and metallic powder are thoroughly dispersed and a smooth, lump -free consistency is achieved. Do not over-mix or over-agitate during mixing such that air is entrained into the coating. The mixing of partial kits is not allowed. Use thinners and thinning amounts as recommended by the manufacturer. Do not thin such that the VOC of the coating exceeds Federal, State, or local VOC rules/regulations. Strain mixed coating through a 30 to 60 mesh screen (or as indicated on PDS) upon completion of mixing. Comply with pot life and “sweat-in” times according to the coating manufacturer’s recommendations before use. Provide replaceable liners and/or new mixing containers to ensure expired coatings are not incorporated during the mixing process.

surfaces during periods of favorable weather and if the specified conditions are met. If the requirements of the coating manufacturer are more stringent, comply with those requirements. Keep the coating work contained, protected from the elements, and within the specified temperature range until the coating is fully cured according to the PDS. The use of heating and/or dehumidification equipment is allowed.

3.a Seasonal Restrictions. Do not apply coatings in the field between November 30 and March 1 unless allowed in writing by the Structure Control Engineer . For multi -season projects, only primer can remain uncoated until the following season.

3.b Temperature. Do not apply coatings if t he temperature of the air, material, or surface inside of containment is below 40F or greater than 110F before the coating dries to full cure according to the times specified in the PDS. If the requirements of the coating manufacturer are more stringent, comply with those requirements.

3.c Dew Point. Do not apply coatings if the temperature of the surface is less than 5F greater than the dew point based on the ambient air inside of containment . If the requirements of the coating manufacturer, are more stringent, comply with those requirements.

3.d Relative Humidity. Do not apply coatings if the relative humidity is below or above the thresholds established in the PDS based on the ambient air inside of containment.

3.e Dampness. Do not apply coatings if it is raining, and/or the surfaces are damp or frosted. Keep the coating work contained and protected until the coating is fully cured according to the PDS/temperature curing curves, before exposing to the elements.

manufacturer, that produce a coating film complying with the specified requirements. Do not use a method

of application disallowed by the manufacturer.

4.a Spray. Airless spray application is the primary method of application unless directed. If conventional air spray is used, provide suitable traps and separators to remove contamination from the compressed air supply. Conduct blotter test(s) according to ASTM D4285 a minimum of one time each shift for each compressor system in use to verify the air supply is clean and dry. Conduct tests in the presence of the Representative. For spray application of zinc primer, provide continuous mechanical agitation of the coating. Set the agitator to maintain a homogeneous mixture and prevent settling of solids and metallic zinc particles while not over-agitating the coating such that air entrainment occurs. Do not allow solvents to enter spray lines for cleaning or any other purpose while coating application is in progress. Only use solvents to clean and flush spray lines after coating application is complete.

4.b Roller. Primarily used for stripe coating. May be used for small repair areas if allowed according to the PDS. Use rollers that do not leave a stippled texture in the paint film. Use rollers only on flat, even surfaces to produce a paint film of even thickness with no skips, runs, sags, or thin areas. Do not use rollers if prohibited by the manufacturer. If rolling with a zinc primer, stir the paint frequently during use to keep the zinc in suspension.

4.c Brush. Primarily used for stripe coating. May be used for small repair areas if allowed according to the PDS. Manipulate the paint under the brush to produce a uniform, even coat. Work the paint into corners and crevices. Move the brush in a series of small circles to thoroughly fill irregularities in the surface. Then, brush out and smooth by a series of parallel strokes until the paint film has an even thickness. Do not use brushes if prohibited by the manufacturer. When brushing with a zinc primer, stir the paint frequently during use to keep the zinc in suspension.

4.d Limited Access Areas. Use long frame roller handles, angled brushes, extended spray wands, or other means to thoroughly coat surfaces inaccessible to normal painting methods. Do not use methods of application, such as daubers, if prohibited by the manufacturer.

5.a Removal of Contaminants. If concrete, salts, grease, oil, carbon based emissions, dirt, dust, or other surface contaminations are present on prime, intermediate, or finish coats, clean the surface as specified in Section 1070.3(c) 10 and the manufacturer's recommendations. Clean bare steel, prime, and intermediate coats before application of subsequent coats. Clean finish coat of rust stains, embedded debris, and other contamination to the satisfaction of the Representative.

5.b Cleaning After Seasonal Shutdowns or Extended Periods (Hold Point). If intermediate and finish coats are not applied before seasonal shutdowns or there is an extended period of time between coats (defined as 80% of the published maximum recoat time or as defined by the coating manufacturer) , thoroughly pressure wash the surface before application of the next coat to remove grease, oil, grime, carbon based emissions, salts, dirt, dust, chalk and other surface contamination. If required by the coating manufacturer, roughen the surface before the application of the next coat. Use clean, potable water at a minimum pressure of 2 ,000 pounds per square inch and maximum pressure of 5,000 p ounds per square inch to remove dirt, dust, chalk, insect and animal nests, bird droppings and other foreign matter. Perform solvent cleaning according to SSPC-SP 1 if grease, oil, carbon- based emissions, or other contaminants are on the surface. If approved detergents are used in the cleaning water, rinse the surface clean with potable water and allow thorough drying before coating. Control the water used for cleaning on the project as specified in Section 1072.

5.c Stripe Coats – All Areas Except Crevice/Gaps Receiving Pack Rust Treatment (Hold Point). Stripe coats are required to be a contrasting color from the full production coat being applied. Follow manufacturer’s requirements for tinting. Before or after application of the production prime coat, brush apply a stripe coat of primer to all nuts, bolts, welds, rivets, corners, crevices, and other irregularities. Thoroughly brush/work in stripe coat to ensure complete coverage. Apply stripe coat of primer to remaining edges , including flange edges , by brushing or rolling before or after application of production prime coat. Extend stripe coat 1 inch beyond the areas to be striped. Complete the stripe coat of primer within timeframes outlined in the PDS. Apply a stripe coat of the intermediate coating to the same surfaces and in the same manner as the primer stripe coat. Do not apply the stripe or full coats until the previous stripe or full coat has dried to recoat according to the PDS. A stripe coat is not required for the finish coat.

5.d Treatment of Pack Rust Areas (Hold Point). After pack rust removal and production blast cleaning, perform the following in crevices/gaps scheduled for pack rust treatment. In all cases, allow the caulking, penetrating sealer, and paint coats to dry according to manufacturer’s recommendations before proceeding to the next step. Apply production primer application to surrounding steel while trying to avoid the crevice/gap to receive pack rust treatment . Overspray into the crevice/gap with primer is allowed. Do not apply the stripe coat of primer to the crevice/gap. Flood apply the penetrating sealer into the crevice/gap, so the material flows and wicks in. Remove excess penetrating sealer after flooding. Brush apply a stripe coat of intermediate to the entire crevice/gap area. After stripe and production intermediate coat application, caulk the crevice/gap to fully bridge and seal the area from moisture intrusion. If applied to multi-sided surfaces, apply caulk to the top and sides of crevice/gaps only. Allow a downward facing or bottom crevice/gap to remain uncaulked so moisture that may enter the crevice/gap can escape. Apply finish coat.

PDS including the thickness ranges for each coat and dry times before the application of the next coat or stripe coat. Achieve a surface free of shadow -through, runs, sags, overspray, dry spray, pinholes, skips, misses, and other film discontinuities. Obtain a dense and uniform appearance for each coat. Determine the dry film thickness of each coat according to SSPC -PA2 Coating Thickness Restriction Level 3, except measure each 100-square foot increment of the surface. Determine the thickness of each coat by subtracting the thickness of the underlying coats from the cumulative thickness measurements. If the thickness of an individual coat is in question , perform destructive dry film thickness measurements according to ASTM D4138 Procedure A, using a grooved cutting instruments such as a Tooke Gauge, or equal. Repair damage created by the cutting instrument at no additional cost to the Department. If the thickness of any coat is less than specified, unless otherwise allowed, apply additional coating to achieve the specified thickness before applying the next coat. If the thickness of any coat exceeds the specified maximum, or the surface exhibits runs, sags, dry spray, overspray, pinholes, or other discontinuities, remove the excessive thickness or discontinuity by sanding or abrasive blast cleaning. If the thickness is reduced to below the specified minimum, recoat the area. If the excessive thickness or discontinuity being removed is in the finish coat, apply a thin coat of finish material to achieve a smooth uniform appearance.

6.a Prime Coat. Apply the primer coating to a total dry film thickness (above the surface profile) employing multiple spray passes, according to the PDS.

6.b Intermediate Coat. Apply intermediate coating to a dry film thickness (above the primer) according to manufacturer’s specified dry film thickness. Use an intermediate coat color that contrasts with the colors of the prime and finish coats.

6.c Finish Coat. Apply the finish coating to a dry film thickness (above the intermediate) according to manufacturer’s recommendations. Ensure touch up and repairs to outside face of fascia beams or exposed steel visible to the public are uniform in nature blending into existing topcoat and void of flashing or checkerboard appearance. If spot touch up on the facia or exposed steel is visible to the public , apply a full finish coat as directed to create a uniform and continuous appearance.

of paint is defective if: it is damaged; it lifts, blisters, peels, or wrinkles; it has holidays, runs or sags; the film exhibits any defect as specified in Section 1070.3(d)6, it shows evidence of application under unfavorable conditions; it does not meet the coating thickness and continuity requirements; rusting occurs; the workmanship is poor; impure or unauthorized paint has been used or if the coating has been damaged through the course of the project. Remove/repair/recoat defective paint and localized contact points due to containment rigging (such as cables, outriggers, etc.) according to the PDS, approved repair procedure, and as directed. If the defective paint or contact point extends to bare steel /substrate, bare steel/substrate is exposed, or original coating system remains, clean the surface according to SSPC-SP10 or SSPC -SP11 while maintaining required surface profile requirements as approved. If the defective paint does not expose the underlying steel/substrate, repair according to the PDS and approved repair procedure. For all repairs, roughen the existing coating around the repair area to ensure good adhesion. Feather the surrounding coating to expose a minimum of 1/2 inch of each coat or according to the manufacturer’s approved repair procedure and provide a smooth transition into intact, adherent material for all coats. For all contact points and localized repair areas, where containment has been removed and when approved, weather -related application conditions are required only throu gh manufacturer's recoat times listed on the PDS.

information on the outside face of the fascia members at the near and far abutment ends (two in total ) unless directed otherwise:

• Line 1: Month and year of completion and ECMS number

• Line 2: BR Key

• Line 3: BMS Number

• Line 4: Full or zone paint, type of coating system, and cleaning method.

• Line 5: NEPCOAT number listed in Bulletin 15, and the manufacturers name.

Examples:

Full Paint: Zone Paint: 08-2018, ECMS 88335 09-2007, ECMS 70202 BR KEY: 712 BR KEY: 1436 02-0051-0110-0000 02-1019-0060-0149 FULL-OZEU, SSPC-SP10 ZONE-OZEU, SSPC-SP10 SSC(04)-03, Sherwin Williams SSC(12)-04, Carboline

Stencil using indelible black paint compatible with the coating system and approved by the coating manufacturer. Provide uniform block lettering 2 inches to 3 inches high.

accepted QC Plan as specified in Section 1070. 3(a)1. Document inspections and submit electronic daily QC reports to the Representative within 48 hours of inspection. Provide a QC inspector that has a minimum AMPP CIP Level 1 certification, is solely dedicated to QC inspection, and does not engage in any production related activities. Do not replace the QC inspector(s) assigned to the project without advanced notice to the Representative and acceptance of the replacement by the Representative. During work, conduct QC inspections necessary to ensure work is performed according to the project specifications. At a minimum, perform the following QC inspections:

• Ambient conditions;

• Compressed air cleanliness;

• Suitability of protective coverings and containment;

• Abrasive cleanliness (SSPC-AB 2);

• Surface cleanliness and profile;

• Soluble salt testing and removal;

• Coating storage, mixing, and application;

• Dry film thickness and continuity of each coat;

• Dry time, curing, and cleanliness of each coat;

• Touch up and repair of damaged or defective coats;

• Daily inspection of project site for cleanliness as defined in this specification including but not limited

to blast media, hazardous/non-hazardous waste, and general refuse;

• Rust stain removal;

• Attend hold point inspections defined in Section 1070.3 (a)7 and designated throughout this specification;

• Final condition and appearance;

as required including providing safe access in close proximity to the work surface(s) where the inspections/observations need to be performed. Allow ample time for inspection activities.

1070.4MEASUREMENT AND PAYMENT—Lump Sum.

removal, pack rust/rust scale removal, soluble salt remediation, grinding of sharp edges, slivers, weld spatter, laminations, removal of concrete slurry, cleaning and application of the three -coat paint system. The price also includes removal of coatings from surfaces not designated to be painted; repair of damage resulting from the coating operation; removal of coating that does not meet specifications and recoating of those surfaces; use of heating and dehumidification, and controls necessary to comply with the requirements of all applicable regulatory agencies.

penetrating sealer and caulking, the proposal will include a predetermined amount of money for furnishing and application of penetrating sealer and caulking. The contract item will have a unit of measure of Dollar, a unit price of $1.00, and a quantity equal to the predetermined amount. This item includes access to the repair locations to perform and inspect the work. For projects that do not include a separate item for penetrating sealer and caulking, the material and work are incidental to the Painting Existing Structural Steel, Lump Sum Item. Because of the contingent or unpredictable nature of the work being performed, the provisions of Section

110.02(d) are not applicable to this item

Measured and paid for, under the Penetrating Sealer and Caulking Applications item as follows:

items listed in the contract, at the contract unit price.

• Negotiated Price. At price agreed upon with the Department Representative before performing the work. If applicable, agreement is also required with FHWA.

• Force Account Basis. Section 110.03(d)