Attachment 3 City of Portland Standard Construction Specifications Section 594.pdf

City of Portland 2020

00594.03

Section 00594 - Preparing and Coating Metal Structures

Description

00594.00 Scope - This work consists of preparing and coating new metal structures and features in the shop and in the field and preparing and coating existing metal structures. This includes all:

• Interior and exterior steel surfaces

• Steel railings, bridge bearings, and bridge expansion joint assemblies

• Other miscellaneous steel

• Galvanized and aluminum surfaces

00594.01 References - In this section, references such as SSPC-SP 1 and SSPC-PA 1 refer to Volume 2, "Systems and Specifications,” of SSPC's "Painting Manual."

In these specifications, references are made to FTMS 141, "Paint, Varnish, Lacquers, and Related Materials: Methods of Inspection, Sampling and Testing,” which is distributed by the U.S. General Services Administration.

00594.03 Precoating Conference and Submittals - Before beginning any preparation and coating work, meet with the Contractor's supervisory personnel and quality control manager, any preparation or coating Subcontractors' supervisory personnel, a representative from the coating manufacturer, and the Owner’s Representative at a mutually agreed upon time. At least 21 calendar days before the precoating conference, submit a plan for accomplishing all phases of the preparation and coating work, including the following:

• Ventilation

• Containment

• Surface preparation

• Painting

• Coating materials

• Quality control plan

• Waste handling and disposal

• All other pertinent information

If the Contractor's key personnel change or if the Contractor proposes a significant revision to the plan for accomplishing the preparation and coating work, the Owner’s Representative may require additional precoating conferences.

Do not begin any preparation or coating work before the plan for completing the work has been approved.

Attachment 3 City of Portland Standard Construction Specifications

00594.11

00594.04 Notice - Notify the Owner’s Representative in writing at least seven

(7) calendar days in advance of the date that preparation and coating operations are to begin.

00594.05 Waste Handling and Disposal - Dispose of waste material according to section 00290.20 and the requirements of SSPC Guide 7 that do not conflict with section 00290.20.

00594.06 Access and Containment for Field Preparation of

Coating - Provide access and containment according to section 00253.

Materials

00594.10 Materials - Furnish materials meeting the requirements of this section, the special provisions, and the applicable portions of SSPC-PA 1, "Shop, Field, and Maintenance Painting” when not in conflict with either this section or the special provisions.

(a) Coating System - Furnish coating materials from the QPL and according to the following requirements:

• For shop coating of steel or iron surfaces, furnish a three (3)-coat system with organic or inorganic zinc primer.

• For maintenance coating of steel or iron surfaces, furnish a three (3)-coat system with organic zinc primer.

• For field rehabilitation of coated steel or iron surfaces, furnish a three (3)-coat system with surface tolerant organic zinc primer.

• For shop coating or maintenance coating of non-ferrous surfaces, furnish a two (2)-coat system.

• For shop pile coating of steel pile, furnish a three (3)-coat system with tar.

Do not apply coating materials until certifications required by section 00165.35(a) and section 00165.35(b) have been provided and the materials are accepted for use by the Owner.

(b) Color - Unless otherwise specified, furnish top-coat color that conforms to the following colors:

• SAE AMS-STD-595 color #24272 for ODOT green top coat.

• SAE AMS-STD-595 color #30059 for weathering steel top coat.

• SAE AMS-STD-595 color #26357 for miscellaneous metal on concrete bridges.

00594.11 Coating Materials:

(a) Manufacturing - Furnish coating material meeting the following requirements:

00594.11

• Prepared by the manufacturer.

• For multi-component coatings, be manufactured in separate, properly portioned containers and ready for field mixing. Do not field mix multi-component coatings unless approved by the Owner’s Representative.

• Homogeneous, free of contamination, and of a consistency suitable for the specified use.

• Does not require a pretreatment chemical or material prior to application of the prime coat except as stipulated in these specifications.

• Includes required tinting and coloring materials at the time of manufacturing. Do not use gray for the first prime coat.

• A sufficiently different shade for each individual coat from the manufacturer so that skips and holidays can be easily detected. Do not tint the coating material in the field unless approved by the Owner’s Representative.

• Does not vary in composition without prior notice by the manufacturer and approval of the Owner’s Representative.

• Has sufficient time remaining on the manufacturer's recommended shelf life to allow for application before expiration of that shelf life.

(b) Packaging - Furnish unopened containers from the manufacturer that meet the following requirements:

• Constructed of new and unused materials.

• Not have a capacity of more than six (6) gallons.

• Meet U.S. Department of Transportation's Hazardous Material Shipping Regulations.

• If necessary, constructed with an interior lining to prevent attack by the coating material. The lining shall not delaminate from the container wall so as to contaminate the coating.

• Labeled with a quality compliance certificate according to section

00165.35 showing the following:

• Manufacturer's name

• Exact title of coating material

• Manufacturer's batch number

• Date manufactured

• Identification of all toxic substances

• Handling and application precautions

(c) Sampling and Testing - Have the coating material manufacturer furnish the following to the ODOT Materials Laboratory:

• One (1) unopened one (1)-quart container of each coating material, each component of multi-component coating material, and each thinner from each batch of each coat. The Owner may, at its discretion, place an

00594.12 inspector at the site of manufacture and obtain check samples at the project site.

• Test results certification according to section 00165.35 for each batch of each coat, and if the coating material is specified for use on steel-to-steel contact surfaces, certification that the coating material meets the requirements of section 00594.11(d).

• A product data sheet for each type of coating material and thinner.

• A material safety data sheet or safety data sheet with the initial sample of each type of coating material and thinner.

Owner testing will include the following tests necessary to ensure that the coating materials conform to specifications, manufacturer's product data sheet, and other testing as the Owner deems appropriate:

Test Test Method

Density of liquid coatings, inks, and related products ................ ASTM D1475 Determination of zinc in dry films of paints and coatings… ........................................................................... ODOT TM 614/ASTM D6580 Coarse particles in pigments, pastes, and paints ......................... ASTM D185 Consistency of paints using the stormer viscometer .................... ASTM D562 Fineness of dispersion of pigment-vehicle system ..................... ASTM D1210 Drying, curing, or film formation of organic coatings at room temperatures ................................................................................................... ASTM D1640 Volatile content of paints ............................................................ ASTM D2369 Pigment content of solvent-type paints ...................................... ASTM D2371 Volume nonvolatile matter in clear or pigmented coatings ......... ASTM D2697 Vehicle solids (ordinary centrifuge) .......................... FTMS 141, Method 4051 Nonvolatile vehicle content ...................................... FTMS 141, Method 4053

Owner testing is not to be construed as determining or predicting the performance or compatibility of the individual coating material or the total coating system.

(d) Slip-critical Connections - The primer coat on steel-to-steel contact surfaces at all slip-critical structural bolted connections using high strength bolts shall conform to Class B (slip coefficient of 0.5) coating requirements in "Test Method to Determine the Slip Coefficient for Coatings Used in Bolted Joints” as adopted by the Research Council on Structural Connections.

00594.12 Caulking - Furnish structural steel caulking from the QPL and approved for use by the coating manufacturer. The caulking color shall be clear, approximate the color of the top coating, or be over coated.

Furnish industrial grade polystyrene or polyurethane backing material of sufficient diameter to fill the crevices or gaps as required.

Obtain the Owner’s Representative's approval of the caulking and backing material before using.

00594.41

00594.13 Chloride Remover - When used, furnish a chloride remover from the QPL that is fully compatible with the coating system according to the recommendations of the coating system manufacturer.

Labor

00594.30 Quality Control Personnel - Provide an on-site quality control manager who shall be responsible for managing quality control related to all preparation and coating quality control activities. The quality control manager shall not be employed in a supervisory role for any preparation or coating work.

Construction

00594.40 General:

(a) New Steel Structures - Prepare and coat new erected steel structures and features. Except as provided in these specifications, perform all required preparation and coating at the fabrication shop after completion of fabrication and before transporting to the project site.

(b) Existing Steel Structures - Prepare and coat the existing steel structures described in the special provisions.

(c) Rehabilitating Coated Steel Structures - Prepare and coat new steel members and existing steel structures impacted by erection. This includes all existing steel surfaces uncovered by the removal of existing steel, wood, and concrete members. Impacted areas include but are not limited to areas where rivets or bolts are removed and existing steel surfaces damaged during erection or other Contractor operations. Except as provided in these specifications, perform all required preparation and coating of new steel members at the fabrication shop after completion of fabrication and before transporting to the project site. Perform preparation and coating of existing steel structures impacted by erection in the field.

(d) Non-steel Metallic Substrates - Prepare and coat new non-steel substrates and features. Except as provided in these specifications, perform all required preparation and coating at the fabrication shop after completion of fabrication and before transporting to the project site. Prepare and coat existing non-steel substrates described in the Contract Documents.

(e) Lighting - Provide lighting during all periods of preparation, coating, and inspection according to SSPC-Guide 12, "Guide for Illumination of Industrial Painting Projects."

00594.41 Special Fabrication, Preparation, and Coating:

(a) Inaccessible Surfaces - Before fabrication, prepare and coat with all coats steel surfaces inaccessible to preparation and coating after fabrication.

00594.42

Prepare and coat contact surfaces within slip-critical joints constructed as part of the work under sections 00560 according to sections 00594.11(d), 00594.42, and 00594.43(d)(1).

(b) Welded Areas - Schedule fabrication, preparation, and coating so that the coating system is not damaged by the welding or fabricating process.

Neutralize weld areas and remove smoke stain and spills according to SSPC- SP 1. Remove weld slag and spatter by mechanical means before blast-cleaning. Supplement blast-cleaning by other treatment as recommended by the manufacturer of the coating system and as required in section 00594.42.

Do not apply coating within four (4) inches of the weld before the welding operation is complete.

00594.42 Preparation of Surfaces:

(a) New Steel Structures - Clean new steel structure surfaces to be coated according to SSPC-SP 10 / NACE No. 2 "Near White Metal Blast Cleaning,” except as modified by this section. The appearance of the final blast-cleaned surface shall closely approximate Pictorial Standard SP 10 of SSPC-Vis 1.

(b) Existing Steel Structures - Blast-clean existing steel structure surfaces to be coated according to SSPC-SP 10 / NACE No. 2 "Near White Metal Blast Cleaning" with the appearance of the blast-cleaned surface to closely approximate Pictorial Standard SP 10 of SSPC-Vis 1, or clean to SSPC-SP WJ-2 "Very Thorough Waterjet Cleaning" with the appearance of the water-jetted surface to closely approximate Pictorial Standard WJ-2 of SSPC-Vis 4.

(c) Rehabilitating Existing Coated Steel Structures - Prepare all existing steel surfaces to be coated according to SSPC-SP 15, "Commercial Grade Power Tool Cleaning.” The cleaned surface shall have a minimum surface profile of one (1) mil.

Prepare all existing coated surfaces exposed by the removal of the existing components involved in the rehabilitation, all areas in which rivets, bolts, or plates are to be removed, and areas damaged by erection or other Contractor operations. Completely clean all existing lead-based coatings exposed by the removal of any structural or miscellaneous member to SSPC-SP 15 "Commercial Grade Power Tool Cleaning" requirements. Extend all prepared areas at least two (2) inches into tightly adhering, intact paint. Overlap the subsequent coating and the still intact coating by a minimum of two (2) inches.

Lightly sand the overlap area of the intact coating to provide a profile to adhere the subsequent repair coating.

(d) Non-steel Metallic Substrates:

(1) Galvanized Surfaces - Prepare surfaces to be coated according to

ASTM D6386.

(2) Aluminum - Prepare aluminum surfaces by using one of the following methods:

• Solvent clean surfaces to be coated according to SSPC-SP 1. Then follow by a light brush blast according to SSPC SP 16 “Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals” with a maximum nozzle pressure of 75 psi.

• Hand sand the surface, creating a minimum one (1) mil profile.

• Clean the surface according to the manufacturer's recommendations.

(e) All Metal Structures - Remove fins, tears, slivers, sharp edges, and hardened or damaged edges according to SSPC Paint Application Guide No. 11.

Clean all surfaces of material detrimental to the application of the coating system as follows:

(1) Cleaning Methods - Blast-clean surfaces using one (1) or more of the following methods to discharge the abrasive:

• A stream of high-pressure air

• A rotating centrifugal paddlewheel

• A stream of high-pressure water

Surfaces shall be dry before cleaning unless a wet blast cleaning method is used. Use methods specified in SSPC-SP 1, "Solvent Cleaning,” SSPC-SP 2, "Hand Tool Cleaning,” SSPC-SP 3, "Power Tool Cleaning,” and SSPC- SP 15 "Commercial Grade Power Tool Clean” as necessary to augment blast-cleaning.

(2) Abrasives - Perform blast-cleaning using an abrasive of a size which will continually produce an angular surface profile of at least one (1) mil but not more than four (4) mils as measured according to ASTM D4417 using replica tape on the prepared surface. The blast-cleaning shall result in a roughened steel surface comparable to a Keane-Tator surface profile comparator for sand or grit using ASTM D4417.

When removing coatings with lead or chromium, use a mineral slag abrasive combined with an approved additive to render the removed coating material non-hazardous. Obtain approval for the specific abrasive blast additive before use.

If a centrifugal wheel with a grit mixer is used for blast-cleaning, inspect each member and for those members not meeting the comparator or profile requirements, perform a final blast-cleaning with high-pressure air with an abrasive to obtain the specified profile.

Provide abrasives that have no corrosion products, water, oil, or any other material detrimental to the application and adherence of the coatings.

Provide abrasives that conform to SSPC-AB 1. When directed, test cleanliness according to ODOT TM 616 ASTM D7393 and ASTM D4940.

The conductivity results from ASTM D4940 shall not exceed 100 microsiemens per centimeter. Wet abrasives are allowed if wet sandblasting methods are used.

(3) Air - For blast-cleaning or blowing down, use high-pressure air that is free of water, oil, or any other material detrimental to the coating system.

Provide adequate separators and traps. Test compressed air cleanliness daily according to ASTM D4285 or as directed.

(4) Water - Use water for water jet cleaning that is clean, potable, and does not contain more than 75 milligrams per liter of chlorides or 200 milligrams per liter of sulfates. Filter, recycle, and dispose of water when surface soluble salt levels cannot consistently be kept below 70 microsiemens per centimeter, measured with a conductivity meter capable of reading to one

(1) microsiemen per centimeter.

Use a rust inhibitor that is recommended by the coating manufacturer. Use the rust inhibitor to prepare a test panel at least 14 calendar days before beginning work to show that the inhibitor does not cause loss of bond between the steel substrate and the primer. Do not use the rust inhibitor product if the test panel does not meet the adhesion requirements of section 00594.43(g).

(5) Cleaning Procedures - Perform blast-cleaning operations and pressure washing as required without damaging partially or entirely completed portions of the work. Do not blast-clean adjacent to areas being coated.

Examine blast-cleaned and pressure washed surfaces for any traces of corrosion, water, oil, grease, soluble salts, and other material deposited during the cleaning operations. If present, remove any detrimental material by solvent cleaning and blast-clean the surface again.

(6) Final Preparation - Do not begin coating before:

• Blowing down prepared surfaces using high pressure air within the fully enclosed containment, with the specified ventilation operating, and supplemented by brushing if required.

• Determining that the prepared surfaces are free of all residues according to SSPC PA-1.

• Repairing all damaged galvanizing according to ASTM A780.

• Obtaining approval from the Owner’s Representative.

(f) Pack Rust Removal - Fully remove pack rust using either of the following methods:

• Mechanically, in combination with saturating the pack rust with water at 3,000 psi and heating to a minimum of 250 °F and a maximum of 400 °F.

• Blast with ultra-high pressure water jetting at 35,000 psi.

00594.43

00594.43 Coating Metal Structures:

(a) Description - When not in conflict with this section and the Contract Documents, perform coating application according to the following:

• The applicable portions of SSPC-PA 1.

• The recommendations of the coating manufacturer.

• The best practices of the trade according to SSPC Painting Manual, Volume 1, "Good Painting Practice."

(b) Application Site Mixing, Thinning, and Storage of Coating Materials:

(1) Rejection - Reject and do not use the contents of a container if:

• The material does not arrive at the application site in the original, unopened manufacturer's containers.

• The container is punctured or has a break in the lid seal.

• The coating materials have begun to polymerize, solidify, gel, or deteriorate in any other manner.

• The recommended shelf life as stated in the manufacturer's product data sheets has expired.

(2) Mixing - Thoroughly mix coating materials by mechanical means to ensure a uniform composition. Do not mix coating materials by means of air stream bubbling or boxing. Mix in the original container and continue until all pigment or metallic powder is in suspension. Ensure that all solid coating material that may have settled to the bottom of the container is thoroughly dispersed. After mixing, inspect the coating materials for uniformity and to ensure that no unmixed pigment or lumps are present.

Add separately packaged catalysts, curing agents, hardeners, initiators, or dry metallic powders to the base coating material only after the base coating material is thoroughly mixed to achieve a uniform mixture with all particles wetted. Add the proper volume of curing agent to the correct volume of base with constant agitation. Use the mixture within the pot life specified by the manufacturer. Discard unused portions at the end of each workday.

(3) Thinning - Do not add additional thinner at the application site unless approved by the Owner’s Representative. If allowed, furnish the amount and type of thinner conforming to the manufacturer's recommendations.

(4) Straining - Strain all coating materials after mixing to remove undesirable matter but not pigment or metallic powder.

(5) Agitation - If recommended by the manufacturer, constantly agitate coating materials during application by using paint pots equipped with mechanical agitators.

(6) Storage - Store the coating material and solvents in original containers.

Store the containers in a weather-tight space where the temperature is maintained between 40 °F and 100 °F or according to the manufacturer recommendations, whichever is more restrictive.

(c) Application of Coating:

(1) Surface Condition - Ensure that surfaces to be coated are free of moisture, dust, grease, or other substances that would prevent the bonding of succeeding applications. Protect freshly coated surfaces from contamination by abrasives, dust, or foreign materials from any source. Do not apply succeeding coats until the Owner’s Representative has approved the prepared surface.

(2) Application Methods - Apply coating materials by air or airless spray, brush, roller, any combination of these methods, or as recommended by the coating material manufacturer unless otherwise specified. If air is used for application, ensure that it is free of water, oil, or any other material detrimental to the coating system. Provide adequate separators and traps, and test air cleanliness daily according to ASTM D4285 or as directed.

Regardless of which application method is used to apply the coating, use brushes to push the coating into complex details, crevices, gaps, areas difficult to access, and where spraying does not adequately cover or penetrate. All application techniques shall conform to Section 7 in SSPC-PA 1 and the applicable sections of SSPC Paint Application Guide No. 11.

Apply subsequent coats of paint in sufficiently different shades so that skips and holidays can be easily detected.

Apply each coat in a uniform layer completely covering the preceding coat.

Correct runs, sags, skips, or other deficiencies before application of succeeding coats. Perform re-cleaning, application of additional coating, or other measures as directed by the Owner’s Representative at no additional cost to the Owner.

For each applicator, perform at least one (1) wet film thickness (WFT) test 15 minutes after beginning coating application and one (1) wet film thickness test per hour thereafter. Test immediately after coating application and report results.

(d) Coating Requirements:

(1) Number of Coats and Film Thickness - Apply all coats to the minimum thickness specified in the manufacturer's product data sheet for the coatings.

Apply the coating system in the number of coats specified in the QPL with each coat consisting of as many applications as necessary to cover the work and achieve the minimum thickness specified for the coat.

On steel-to-steel contact surfaces, apply only zinc primer coating. On steel-to-concrete contact surfaces, apply the full coating system so that it extends one (1) inch into the steel-to-concrete contact surface if accessible. On steel-to-wood contact surfaces, apply all coatings specified.

The dry film thickness of the primer on steel-to-steel contact surfaces shall not be less than three (3) mils nor more than the manufacturer's class "B" certification allows.

Do not assemble coated joints before the coatings have cured for at least the time used in the qualifying test or as recommended by the manufacturer.

(2) Stripe Coats - On maintenance coating projects, apply a prime stripe coat by hand before applying the full prime coat, and apply an intermediate stripe coat by hand before applying the full intermediate coat. Apply the stripe coat by brush only. Use brushes to push the coating around and into complex details and irregular surfaces. Make each stripe coat a different color than the preceding and subsequent full coat, extending a minimum of one (1) inch from the irregular surface and completely hiding the substrate.

The stripe coat shall be a different color and be approximately three (3) mils thick. Each stripe coat will have its own hold point and shall not be used to correct deficiencies in the preceding or subsequent coats. Apply stripe coats according to the applicable sections of SSPC Paint Application Guide No. 11 that do not conflict with this section or the special provisions.

A brush-augmented hold coat may be applied prior to the full prime coat as the stripe coat to prevent rustback of the cleaned steel surfaces, if approved by the Owner’s Representative. Submit hold coat procedure to the Owner’s Representative prior to hold coat operations. If rustback, rust bloom, or rust stains are present on the surface after the hold coat application prior to full prime coat, re-prepare the surface according to section 00594.42, and resubmit the hold coat procedure to the Owner’s Representative.

(3) Coating Thickness and Coverage Requirements - The Owner’s Representative will take dry coating thickness measurements after the application of each coat and before application of the succeeding coat. In addition to coating thickness measurements, a visual inspection for complete coverage will be made by the Owner’s Representative after each coat. Apply each coat in sufficient thickness to achieve uniform and complete coverage and appearance. If all thickness measurements are not within the specified minimum dry film thickness or if the visual inspection does not satisfy the Owner’s Representative, make additional applications as necessary to meet the thickness and coverage required. Film thickness will be measured above the peaks of the profile of the anchor pattern in the metal substrate.

The Owner’s Representative will take dry film thickness measurements with a Type 2 gauge according to SSPC-PA 2. The minimum dry film thickness measurements and frequency of measurements will be according to SSPC-PA 2, modified as follows:

• A single gauge reading will be taken for each 10 square feet of surface area.

• A spot measurement is only taken at locations where a gauge reading is less than 100 percent of the project's specified minimum DFT.

• All spot measurements shall meet 100 percent of the project's specified minimum DFT.

• Additional readings may be required to identify the limits of the non-compliant areas.

If a question arises about an individual coat thickness or coverage, it will be verified using a Tooke gauge according to ASTM D4138. If the Tooke gauge shows a prime coat to be less than the specified minimum thickness or reveals a missing intermediate coat, the total coating system will be rejected even if the thickness of the total system equals or exceeds total specified thickness.

In areas where dry film thickness measurements are impracticable, wet film thickness measurements will be made according to ASTM D4414.

(4) Additional Top Coat Requirements - Even if the total thicknesses of prime and intermediate coats exceed the specified thicknesses of the prime and intermediate coats, apply the top coat to at least the minimum required topcoat thickness to provide uniform and complete coverage and appearance.

(e) Time of Application - Unless otherwise approved by the Owner’s Representative, prime existing steel structure surfaces according to one (1) of the following methods:

• Prime on the same day that the surfaces are cleaned.

• Apply an approved rust inhibitor to the entire surface on the same day as cleaning, and prime within 48 hours after inhibitor application.

• Reblast all surfaces prior to coating.

Before priming surfaces prepared by waterjetting, ensure that the surfaces do not exceed "Light" flash rust as defined by the "Wipe Test" in SSPC-SP WJ-2.

Ensure that all other surfaces are dry and free of flash rust before priming.

Apply each coat over the preceding coat as soon as possible, allowing for drying time of the preceding coat, weather, temperature, and similar factors, as well as the manufacturer's recommendations. Re-prepare a primer coat that exhibits freckle rust or is exposed to the weather for more than 60 days according to section 00594.42.

Allow each coat to dry and sufficiently cure before recoating so the succeeding or additional coat can be applied without delamination, blistering, wrinkling, or loss of adhesion or cohesion. Conform to the manufacturer's recommendations for recoat times unless they conflict with this section or any coating problems develop. Do not revise recoat times without receiving approval from the Owner’s Representative.

(f) Caulking - Apply caulk after complete application of the top coat. Fill and seal crevices and gaps between structural shapes and plates, around bolt heads and nuts, and similar areas that would retain moisture with the following:

• Caulk, if the crevice or gap cannot be filled with coating materials.

• Backing material and caulk to fill the crevices and gaps that exceed 1/4 inch.

Apply caulk over the backing material to form a watertight seal.

In areas that collect or channel water, apply caulk even if coating fills the gap.

(g) Adhesion - Perform adhesion tests according to “ASTM D4541, Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers” using "Test Method D, E, or F” as warranted or at the direction of the Owner’s Representative. Ensure that a minimum pull-off strength of 650 psi is achieved for zincrich primers and tar based coatings and that a minimum pull-off strength of 1,000 psi is achieved for all other coatings, including those over a zincrich primer. When testing a coating or coating system with a DFT of more than 12 mils, score around the test fixture.

(h) Environmental Conditions - Test environmental conditions according to ASTM E337 and apply coating materials only during periods when:

• Air temperature is above 45 °F

• Steel surface temperature is:

• Greater than 45 °F

• Less than 115 °F

• At least 5 °F above the dew point

• Relative humidity is within the manufacturer's recommended range

Do not apply coating materials if the Owner’s Representative determines that conditions are not favorable for proper application and performance of the coating.

If fresh coatings are damaged by the elements, replace or repair at no additional cost to the Owner.

If a coating system allows application in environmental conditions different from those specified, submit a letter from the manufacturer stating the conditions under which the coatings can be applied. Application under conditions other than specified will not be allowed without the Owner’s Representative's written approval.

00594.44

Cover and protect the metal if coating is to be applied in adverse weather conditions. Heat the metal and surrounding air to the temperature specified in this subsection. Continue protecting the newly coated surfaces until the coating achieves proper cure.

(i) Stenciling - Stencil the month and year of application and the type of coating used in block letters two (2) inches high at a location on each end of each span on the structure being coated. The exact location of stenciling will be determined by the Owner’s Representative. Use flat black color stenciling unless otherwise directed.

00594.44 Inspecting - The Owner’s Representative will inspect each phase of preparation and coating. Do not proceed with succeeding phases until approved.

Provide the inspector timely access to areas where work is being performed. Allow adequate time for inspection at each hold point. Hold points are the following:

• Before cleaning operations begin

• After cleaning operations are completed and before application of any coating materials

• After each stripe coat

• After each full coat

• After cleaning in conjunction with coating repairs

• After application of each coat in coating repairs

• After application of last coat and before moving work platforms and containment structures

Repair coating system damages resulting from Owner inspection and testing at no additional cost to the Owner.

Aspects of the preparation and coating process to be inspected and tested include, but are not limited to:

Test Test Method

Environmental conditions for coating .......................................... ASTM E337 Oil in the abrasive material ........................................................ ASTM D7393 Ionic contamination of abrasive material ........... ODOT TM 616/ASTM D4940 Cleanness of compressed air .................................................... ASTM D4285 Pictorial surface preparation standards .................... SSPC-VIS 1, 3, 4, and 5 Surface profile by Keane-Tator comparator .............................. ASTM D4417 Surface profile by replica tape ................................................... ASTM D4417 Wet film thickness ..................................................................... ASTM D4414 Dry film thickness by magnetic gauge ........................... SSPC-PA2 (modified) Dry film thickness by Tooke gauge ........................................... ASTM D4138 Pull-off strength of coating ......................... ASTM D4541 (Method D, E, or F) Nonvolatile vehicle content ..................................... FTMS 141, Method 4053

00594.60

00594.45 Protecting Against Damage:

(a) Contaminated Surfaces - If the prepared surface becomes contaminated by material other than rust, clean the surface in a manner satisfactory to the Owner’s Representative before making the succeeding application. If the prepared surface becomes contaminated by rust, prepare the contaminated area again according to section 00594.42, and recoat with all specified coats.

Clean, prepare, and recoat at no additional cost to the Owner.

(b) Surfaces Not to Be Coated - Protect surfaces that are not to be coated from blastcleaning, overspray, and drippings. Remove or repair unintended coatings or other damage on these surfaces to the Owner’s Representative’s satisfaction at no additional cost to the Owner.

Do not clean or coat galvanized steel members such as ladders, safety rails, and stanchions unless otherwise directed in the Contract Documents. Protect them from damage during preparation and application operations. Repair damaged galvanizing at no additional cost to the Owner.

Protect navigation lights and conduits. If navigation lights or lenses are damaged by preparation or coating operations, immediately repair or replace at no additional cost to the Owner. Keep navigation lights operating and visible at all times.

(c) Handling, Shipping, or Surface Damage - Exercise care in moving or handling metal in the shop, during shipping, and during erection. Do not move or handle coated metal until the coating has cured.

Repair marred or damaged coated surfaces at no additional cost to the Owner with the same materials and to the same condition as specified. At the completion of all work, the coating shall be complete and the surfaces undamaged and clean.

(d) Other Damage - Prevent, at no additional cost to the Owner, damage resulting from preparation and coating work, including:

• Damage to marine or vehicular traffic or harm to pedestrians in the vicinity of the work.

• Abrasive material or debris falling into an area that would create a traffic hazard.

• Damage to the bridge substructure, superstructure, or motorized equipment.

• Damage to other property as a result of the Contractor's operations.

Maintenance

00594.60 Repair of Damaged and Unacceptable Coatings - Repair damaged surfaces and surfaces not in compliance with requirements of section

00594.43 as follows:

00594.75

(a) Surface Preparation - Repair localized damage, corrosion, and unacceptable coatings.

Prepare areas exhibiting coating defects down to the metal substrate, whether exhibiting visible corrosion or not, according to SSPC-SP 10 / NACE No. 2 "Near White Metal Blast Cleaning."

If approved by the Owner’s Representative, prepare small areas according to SSPCSP 15, taking care not to damage adjacent areas.

In areas exhibiting coating defects that do not extend down to the metal substrate, remove all loose, delaminating, non-intact, non-sound coatings, or otherwise defective coating down to sound, still-performing coating. Extend the prepared areas at least two (2) inches into adjacent tightly adhering, intact coating.

(b) Feathering of Repair Areas - Feather the existing coating system surrounding each repair location. Feather the existing coating for a distance of one (1) to two (2) inches to provide a smooth, tapered transition into the existing intact coating.

Verify that the edges of the coating around the periphery of the repair area are tight and intact by probing with a putty knife according to SSPC-SP 3.

Roughen the existing coating in the feathered area to ensure proper adhesion of the repair coats. Overlap the intact, still-sound surfaces at least two (2) inches.

(c) Coating Application in Repair Areas - When the bare metal substrate is exposed in the repair area, apply all coats of the system to the specified thicknesses.

When the damage does not extend to the bare metal substrate, apply only the affected coats.

Maintain the thickness of the system in overlap areas within the specified total thickness tolerances and overlap the intact, sound existing coating at least two (2) inches.

Finishing and Cleaning Up

00594.75 Coating System Warranty and Supplemental Warranty

Performance Bond - When the Contract Documents identify that a coating system warranty and a supplemental warranty performance bond are required, provide them according to section 00170.85(b)(1) and the following:

(a) Coating System Warranty - Unconditionally warrant to the Owner that all coating work and the coating systems, above deck and below deck, performed and applied on this project are and shall be free of all defects for a period of 36 months. Provide a written 36-month warranty using the Owner-supplied coating system warranty form that is included near the front of the special provisions booklet. Furnish the written warranty 30 calendar days before the

00594.75 precoating conference. "Unconditionally warrant" means that the warranty covers all defects regardless of the source or cause of the defect, including, without limitation, whether the source or cause is or may be related to workmanship, inspection, or choice of materials.

For purposes of the warranty, coating system defects are defined as any one

(1) or more of the following conditions:

• Visible rust or rust breakthrough

• Blistering, cracking, or alligatoring

• Chalking or fading

• Loss of adhesion

• Cohesive failure

The Owner inspection of any portion of the work during the Contract and during the coating system application, the Owner acceptance of the work, corrections under the warranty, or expiration of the warranty shall not relieve the Contractor of its obligations under this warranty. Within 60 calendar days of written notification of defects, submit a repair plan to the Owner’s Representative. Within 120 calendar days of written notification of defects, or within such other time as the Owner’s Representative may agree in writing, correct all defects at no additional cost to the Owner.

The 36-month coating system warranty will begin on the date of second notification. During this warranty period, the Owner will inspect the coating system for defects three (3) times: approximately 12, 24, and 36 months after issuance of the second notification. The Contractor will be notified in advance of each inspection and will be permitted to accompany the Owner Inspector.

Make repairs and correct all defects to the coating system. Make all corrections and repairs according to the Contract Documents requirements.

(b) Supplemental Warranty Performance Bond - Provide a supplemental warranty performance bond, in addition to the regular performance bond for the Contract, executed by a surety authorized to do business in the state of Oregon. Furnish the supplemental warranty performance bond 30 calendar days before the precoating conference. The supplemental warranty performance bond dollar amount will be listed in the special provisions.

The bond is to secure the performance by the Contractor of correction work on any coating system defects that the Contractor may be directed by the Owner to perform. Use the Owner-provided form included near the front of the special provisions booklet, except when the surety is a multiple surety, obtain a co-surety execution form from the Owner. The supplemental warranty performance bond shall be signed by the surety's authorized attorney-in-fact with the surety's seal affixed to the bond. Attach a power of attorney for the attorney-in-fact to the bond; include the bond numbers, and affix the surety's original seal to the power of attorney. If executed by co-sureties, each surety shall sign, seal, and attach the power of attorney.

00594.90

The supplemental warranty performance bond shall become effective on the date of second notification and continue in full force and effect until the Owner has advised the Contractor of either of the following:

• There are no coating system defects at the end of the full warranty period.

• The Contractor has been notified that there are coating system defects, the defects have been repaired by the Contractor to the satisfaction of the Owner as specified under the coating system warranty, and the full warranty period has expired.

Supplemental warranty performance bonds cannot be canceled nor be released due to possible claims.

Measurement

00594.80 Measurement - Except for pack rust removal, no measurement of quantities will be made for work performed under this section.

Pack rust removal will be measured on the length basis.