- 550 - SECTION 709 -- PAINTING
709.01 Description
1.The Contractor sha ll prepare the surfaces to be painted, furnish the paint, apply the paint, protect the paint, and dry the paint.
709.02 Material Requirements
1.The Contractor shall furnish a paint system listed on the Department’s Approved Products List or as specified in the contract.
2.The Contractor shall furnish t he paint manufacturer's certification that the paint complies with the paint system specified. T he Contractor shall submit the certification at least 14 days prior to starting the painting.
3.The Contractor shall furnish the Engineer with a complete set of the paint manufacturer’s product data s heets and application procedures. The Contractor shall submit the data sheets and applicat ion procedures at least 14 days prior to starting the painting.
709.03 Construction Methods
1.The Contractor shall pain t structural steel as follows:
a.General: (1) All painting shall be done in strict compliance with the paint manufacturer's recomm endations and the contract.
2.All new structural steel work shall be painted with the system specified in the contract.
3.The exposed surfaces of the steel bearing piles, steel sheet piles, steel pile shells, and stee l pile enclosures above finished ground line or stream bed shall be cleaned and painted with a prime coat. The final coat is not required.
4.All miscellaneous steel, tie rods, armor angles, nose angles, and extrusions for strip seals, except surfaces against which plastic concrete is to be placed, shall be cleaned and painted with a prime coat. The final coat is not required.
5.Weathering steel shall not be painted.
6.Galvanized surfaces shall not be painted.
b.Surface Preparation: (1) All steel surfaces to be painted shall be blast-cleaned to a near-white condition in accordance with The Society for Protective Coatings standard SSPC-SP10. The pictorial refere nce standards contained in SSPC- VIS 1, which correspond to specificat ion SSPC-SP10, may be used to aid the evaluation of t he surface cleaning.
2.The abrasives used shall be clean, dry, sand; steel grit; or iron, steel, or synthetic shot and sh all be of a gradation which produces acceptable results. When shot is used fo r blasting, it must contain sufficient grit to produce a sharp, angular, anchor pattern. If there is not a manufacture’s recommendation, the typica l profile height shall be 2 to 2 1/2 mils (50 to 63 µm). The blasting surfac e profile height shall be in accordance with manufacturer’s recommendations. Painting 709.03 - 551 - (3) The cleaned surface shall be one that is free of all rust, mill scale, and paint, with only slight shadows, streaks, or discolorations. At least 95% of the surface area shall be free of all visible residues, and the remainder shall be limited to the lig ht discoloration mentioned above. Hammers, brushes, scrapers, and other hand or power tools shall be used to supplement blast cleaning, as necessary.
4.Surfaces that will be ina ccessible after fabrication shall be blast cleaned before assembly.
5.All blasted surfaces shall be brushed clean with bristle or wood fiber brushes, blown clean with compressed air which is free of oil or water, or cleaned by vacuum to remove any trace of blast products from the surface, pockets, or corners. All oil spots shall be cleaned with a suitable solvent.
6.The cleaning shall be inspected by the Engineer before painting commences.
7.Blast cleaned surfaces shall receive the prime coat of paint within 24 hours after cleaning unless otherwise authorized by the Engineer. Any rust or surface contamin ation occurring before painting will require recleaning.
8.Where touch-up of the prime coat is required, cleaning of small areas may be accomplished by the use of a needle gun or coarse sandpaper. Larger areas shall be blast cleaned.
c.Mixing and Thinning Paint: Mixing, thinning, pot life, and storage shall be in accordance with the paint manufacturer's recommendations.
d.Application of Paint: (1) Application of paint shall not be allowed until the certification stating that the paint complies with the paint system specified has been received and accepted by the Engineer.
2.Painters and quality control personnel to be involved with the paint system shall have passed a training program given by the paint manufacturer's technical representative. The paint manufacturer shall issue a certificate for each individual who has been trained. The Contractor shall present copies of these current cert ificates to the Engineer prior to application of the paint system.
3.All painting shall be done in a neat and professional manner in accordance with the paint manufacturer's recommendations. Paint shall be applied to the structure to pr oduce a smooth, uniform film without runs, sags, lap marks, or dry spray overspray. Paint shall be applied at temperatures and humidities specified by the paint manufacturer. Paint shall not be applied upon damp surfaces or under any weather conditions that, in the judgement of the Engineer, ar e unsatisfactory for painting.
4.Quality Control: (i) It shall be the responsibility of the Contractor to conduct and document quality control inspection of the painting, including measurements of temper ature, dew point, surface profile, and paint thickness.
709.03 Painting
- 552 - (ii) The measurements shall satisfy the recommendations of the paint manufacturer and shall meet the requirements of the contract. (iii) Written documentatio n of measurements taken shall be provided to the Engineer daily.
5.Paint which is not acceptable shall be completely removed and the surface recoated by the Cont ractor to the satisfaction of the Engineer. Additional compensation will not be allowed for this cleaning or recoating.
6.During fabrication and shop coating, scaffolding shall be furnished and erected so the Engineer can inspect the steel before and after coating.
7.Rubber rollers or other protective devices shall be used on scaffold fastenings. Metal rollers or clamps and other types of fastenings which will mar or damage freshly coated surfaces shall not be used.
e.Shop Painting:
1.When all fabrication wo rk is completed and has been inspected, all surfaces not painted before assembling shall be painted with the first, or prime, coat.
2.Before the material may be moved, the first, or prime, coat shall be allowed to cure for a minimum of 24 hours or the time that the manufacturer recommends. The minimum dry-film thickness of the prime coat shall be 2 mils (50 µm). The ma ximum dry-film thickness shall not exceed 6 mils (150 µm) The total dry-film thickness shall be in accordance with manufacturer’s recommendations.
3.The dry-film thickness of the prime coat shall be 1 1/2 to 2 mils (38 to 50 µm) for surfaces held in contact with high strength steel bolts (in lieu of the thickness specified for the regular paint system).
4.Surfaces against which plastic concrete is to be placed need not be painted. Bolts, nuts, and washers installed in the field shall not be painted in the shop.
5.Surfaces which are not to be in contact but which will be inaccessible after erection shall be painted in the shop with the full paint system required on the completed structure.
6.If the proper dry-film thickness of the prime coat is not obtained with 1 coat, the cured film s hall be cleaned of all contaminants and blasted to slightly etch the existing film. Since adhesion problems may occur between coats of zinc primers, the area shall be coated to the proper film thickness with a zinc-rich primer specifically recommended for this procedure by the manufacturer of the cured primer. In no case shall the total dry-film thickness of the prime c oats exceed 6 mils (150 µm), or in accordance with manufacturer’s recommendations.
7.The prime coat shall be allowed to stand a sufficient length of time to allow the film to cure thoroughly throughout its entire thickness before the final, or finish, coat is appli ed. This time will vary with weather conditions, but in no case should the drying time be less than that specified by the paint manufacturer. The prime coat shall be thoroughly cured before the painted steel is loaded for shipment. Painting 709.03 - 553 - (8) Erection marks for field identification of members and weight marks shall be painted on the top flange of girders or upon the prime coat applied in the shop.
f.Field Painting:
1.Before applying the final or finish coat, the first, or prime, coat shall be cleaned in accordance with the paint manufacturer's recommendation and the surfaces allowed to dry. The cleaning shall be inspected by the paint manufacturer an d the Engineer before application of the final coat commences.
2.Before application of the final coat, all areas where the prime coat has been damaged during shipping, handling, and erection shall be cleaned as specified under "Surface Preparation" and painted with the primer to a condition equal to that r equired for the prime coat applied in the shop.
3.Unless otherwise specifi ed, all structural steel that has received the first, or prime, coat, except contact surfaces, shall be field painted after erection with the final, or finish, coat. The minimum dry-film thickness of the final, or finish, coat shall be 2 mils (50 µm), or in accordance with manufacturer’s recommendations.
4.When the erection work is complete and before the final coat is applied, all bolts, nuts, and washers shall be cleaned of all adhering rust, scale, dirt, grease, or other foreign matter in an applicable manner as described in Paragraph 1.b. of this Su bsection and painted with primer to a condition equal to that required for the first, or prime coat applied in the shop.
5.If, in the judgement of the Engineer, traffi c produces an objectionable quantity of dust, the Contra ctor shall, at no additional cost to the Department, take measures to reduce the dust for the necessary distance on each side of the struct ure and take any other precautions necessary to prevent dust and dirt from coming in contact with freshly painted surfaces or with surfaces to be painted.
2.The Contractor shall overcoat existing painted structural steel as follows:
a.General:
1.All painting shall be done in strict compliance with the paint manufacturer's specific ations and the contract.
2.All existing steel structures, unless otherwise specified, shall be painted with the system specified in the contract.
3.Only the exposed surfaces of the steel bearing piles, steel sheet piles, steel pile shells, and stee l pile enclosures above finished ground line or stream bed shall be cleaned and painted with a prime coat . The final coat is not required.
4.All miscellaneous steel, armor angles, nose angles, and extrusions for strip seals, shall be cleaned and painted with a prime coat . The final coat is not required.
709.03 Painting
- 554 - (5) Paint on existing structural steel which contains lead in excess of State or Federal limits shall be treated as a hazardous material and shall be subject to the appropriate governing regulations and laws.
b.Surface Preparation:
1.All steel surfaces shall be cleaned and prepared in accordance with manufacturer’s recommendations; and all debris or waste shall be contained, collected, and dis posed of in accordance with the special provisions for "Environmental Protection" in the contract.
2.Cleaned surfaces shall receive the first coat of paint within 24 hours after cleaning, unless otherwise authorized by the Engineer. Any rust or surface contamination o ccurring before painting will require recleaning.
3.Where touch-up is required, cleaning of small areas may be accomplished by the use of a needl e gun or coarse sandpaper. Larger areas shall be cleaned using the methods specified in the special provisions for "Environmental Protection" in the contract.
c.Mixing and Thinning Paint: Mixing, thinning, pot life, and storage shall be in accordance with the manufacturer's recommendations.
d.Application of Paint: (1) Application of paint will not be allowed until the certification stating that the paint complies with the paint system specified has been received by the Engineer 7 days in advance.
2.Painters and quality control personnel to be involved with the paint system shall have passed a training program given by the paint manufacturer's technical representative. The paint manufacturer shall issue a certificate for each individual who has been trained. The Contractor shall present copies of these current certific ates to the Engineer 7 days prior to application of the paint system.
3.All painting shall be done in a neat and professional manner in accordance with the paint manufacturer's specifications. Paint shall be applied to the structure to pr oduce a smooth, uniform film without runs, sags, lap marks, or dry spray overspray. Paint shall be applied at temperatures and humidities specified by the paint manufacturer. Paint shall not be applied upon damp surfaces or under any weather conditions that, in the opinion of the Engineer, ar e unsatisfactory for painting.
4.Quality Control: (i) It shall be the responsibility of the Contractor to conduct quality control inspection of t he painting, including measurements of temperature, dew point, surface profile, and paint thickness. (ii) The measurements shall satisfy the recommendations of the paint manufacturer and shall meet the requirements of the contract (iii) Written documentatio n of measurements taken shall be provided to the Engineer.
5.Paint which is not acceptable shall be thoroughly removed and the surface recoated by the Cont ractor to the satisfaction of the Painting 709.03 - 555 - Engineer. Additional compensation will not be allowed for this cleaning or recoating.
6.During fabrication and shop coating, scaffolding shall be furnished and erected so the Engineer can inspect the steel before and after coating.
7.Rubber rollers or other protective devices used on scaffold fastenings shall be approved by the Engineer. Metal rollers or clamps and other types of fastenings which will ma r or damage freshly coated surfaces shall not be used.
8.If, in the judgement of the Engineer, traffi c produces an objectionable quantity of dust, the Contra ctor shall, at no additional cost to the Department, take measures to reduce the dust for the necessary distance on each side of the struct ure and take any other precautions necessary to prevent dust and dirt from coming in contact with freshly painted surfaces or with surfaces to be painted.
3.Handling Coated Steel: a. Extreme care shall be exerci sed in handling the steel in the shop, during shipping, during assembly, and during subsequent construction of the structure. Painted steel shall not be moved or handled until sufficient cure time has elapsed to insure no damage is done to the fresh coating.
b.The steel shall be insulated from binding chains by softeners. c. Hooks and slings used to hoist steel shall be padded. d. Diaphragms and similar pieces shall be spaced to minimize rubbing during shipment.
e.The steel shall be stored on wooden pallets or wooden blocks at the job site, or by other means appr oved by the Engineer, so that it does not rest on the ground and so that co mponents do not fall or rest on each other.
4.Cleaning Weathering Steel:
a.The exterior web of the exte rior girders, and all splice plates and the contact surfaces of all bolted splices, shall be blast cleaned by the Contractor in accordance with The So ciety for Protective Coatings standard SSPC-SP6, Commercial Blast Cleaning. T he cleaning of all other surfaces shall remove all rust, mill scale, pain t, markings, dirt, and all other foreign material. The metal shall be uniformly cleaned, with only slight shadows, streaks, or discolorations from rust an d mill scale oxides remaining. Grease, oil, and paint shall first be removed by suitable solvents.
b.All other steel surfaces (excep t those specified to be metallized or galvanized) shall be cleaned only to the extent necessary to remove oil, grease, and dirt.
c.All blast cleaned surfac es shall be protected against contamination by oil, grease, paint, or other markings during transportation, storage, and assembly, and against form marks and mortar leaks and spatters during decking and concrete placement.
709.04 Painting
- 556 - 709.04 -- Method of Measurement
1."Painting Structure at _ ____" and "Painting Piles and Miscellaneous Steel" are not measured but are lump sum bid items.
709.05 Basis of Payment
1.P a y I t e m P a y U n i t Painting Structure at ________ Lump Sum (LS) Painting Piles and Miscellaneous Steel Lump Sum (LS)
2.The painting of new structur es and piling will not be paid for directly, but shall be considered subsidia ry to the relevant structure pay item.
3.Cleaning weathering steel is subsid iary to the relevant structure pay item that contains the weathering steel.
4.The Contractor shall provide all necessary dust and dirt control measures at no additional cost to the Department.
5.Payment is full compensation for all work described in this Section. - 557 - SECTION 710 -- CONCRETE BRI DGE DECK REPAIR WITH CLASS 47BD 4000 CONCRETE
710.01 Description
1.The work shall include removing unsound concrete, disposing of the old concrete, preparation of the r epair area, and furnishing, placing, finishing, and curing the concrete for repairs to bridge deck.
710.02 Material Requirements
1.Materials shall conform to the requirements in Table 710.01. Table 710.01 Material Requirements Applicable Materials Section Portland Cement Concrete ............................ .1002 Curing Ma terials ............................................. .1010, 1011 Fine Aggregate for Concrete Bridge Deck Overlays ......................................................... . 1033 Coarse Aggregate for Concrete Bridge Deck Over lays................................................ . Water for Concrete ......................................... .1005 Adhesiv e ........................................................ .1018 Joint Sealing Filler .......................................... .1014
2.The 47BD concrete may use Class F coarse aggregate shown in Table 1033.03A.
710.03 Equipment
1.Surface preparation equipment shall be of the following types:
a.Concrete saws capable of sawing to a specified depth.
b.Sandblasting equipment able to remove rust and concrete from exposed reinforcing bars. The equipment shall also be able to remove loose and fractured particles from the prepared concrete surface.
c.Power-driven hand tools will be allowed with the following restrictions:
1.Jackhammers greater than the nominal 60 lb (27 kg) class shall not be used.
2.Jackhammers or chipping tools shall not be operated at an angle greater than 45 degrees measured from the deck surface.
3.Chipping hammers greater than the 30 lb (13.5 kg) class shall not be used to remove concrete from beneath reinforcing bars in partial depth repair.
2.Vibrating screeds, either mech anical or hand operated shall be used to finish the concrete.
710.04 Construction Methods
1.General Requirements:
a.No loads other than construction equipment shall be allowed on any portion of the concrete de ck which has undergone preparation and removal of the old concrete surface. No construction load will be allowed which exceeds either an 8,000 lb (3625 kg) wheel load or a 16,000 lb
Referenced in this section
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Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 584–590 of 1,048. View official source ↗