SECTION 816 - MAINTE NANCE PAINTING OF METAL STRUCTURES
816.01 Description. This work consists of furnishing all materials, equipment and labor
for the cleaning and painting of metal structur es. It shall include, unless otherwise provided in the contract, the preparation of metal surfaces, the application, protection and drying of the paint coatings, supplying all tackle, scaf folding and other essentials necessary to complete the work in accordance with the specifications and as specified on the plans.
816.02 Materials . The coating system selected for maintenance painting must be lead
free, VOC compliant and must be listed on the Department's APL under “Approved Coating Systems for Upgrading Existing Coatin gs by Maintenance Forces.” The coating system shall consist of three co ats as follows; an approved prim er coat paint, intermediate coat paint and a top coat paint. The substituti on of a primer, intermediate or top coat paint from one approved coating system to another is not permitted. The integrity of each approved coating system must be maintained. When the project requires the painting of both new and existing metal structures, the different painting systems selected shall be from the same manufacturer and shall have the same top coat color.
816.03 Construction Requirements.
816.03.1 Weather Limitations . Solvent base paint shall not be applied when the
surrounding air temperature is below 40°F. Waterborne paint shall not be applied when the surrounding air temperature is below 50 °F. Paint shall not be applied when the surrounding air temperature is expected to drop to 32°F prior to drying of the paint. Paint shall not be applied when the metal is hot enough to cause blistering or produce a porous film. Paint shall not be applie d when steel surface is less than 5°F above the dew point nor shall it be applied in rain, snow, wind, fog, mist or when, in the opinion of the Engineer, conditions are otherwise un satisfactory for the work.
816.03.2 Pollution Control During Surface Preparation And Repainting . Generated
debris must be confined to the immediate ar ea of the structure. Appropriate screens and barriers must be erected to protect pedestrian and vehicular traffic during waterblasting and painting operation. Overspray must be kept to a bare minimum.
816.03.3 Surface Preparation . Surface preparation will incl ude waterblasting the entire
surface followed by spot cleaning with hand t ools to remove any remaining loose or flaking paint or rust, dirt, oil, grease and/or other de leterious matter from the steel surface. Tightly bonded paint is not to be removed and it is not necessary to remove tightly bonded rust. In areas containing a heavy coating of oil, gr ease and/or deleterious material that cannot be cleaned by waterblasting, clea ning shall be performed using an environmentally sensitive biodegradable solvent. Brush or mop the so lvent on the surface with a rubbing action to loosen the film. Wipe off with a clean dry cl oth and then rinse by waterblasting. Repeat as necessary until clean. The cleanliness of the su rface shall be approved by the Project Engineer or a designated representative prior to beginning painting operations.
816.03.3 1--Waterblasting . The waterblasting unit must be capable of operating at
pressures up to 4,000 psi at a water flow rate up to 10 gpm. The unit must be equipped with a water filter, pressure gauge, nozzle with 1/8- inch orifice or one that will provide a jet stream of water, and sufficient length of hydraulic hose. The unit shall be equipped with a deadman control valve or other contro l valves that will prov ide automatic shut-off by release of the trigger. Water for blasting must be potable water to prevent damage to the pump and to ensure a clean surface on th e steel. During waterblasting operation, wood, insulation, electrical, instrument ation, etc., must be protected. After waterblasting, remove any remaining loose paint, loose rust and rust scale with wire brushes or other methods as necessary. Using the waterblast unit or compressed air, remove the loose debris generated from the hand tool cleaning operation. To pr event recontamination of the steel surface, the surface preparation operation sh ould not be completed more than eight hours in advance of the painting operation. Should any recontamination occur prior to painting, repeat surface preparation procedures as necessary fo r removal. Before painting, the surfaces must be clean and dry. To enhance drying of the surfaces, compressed air may be used.
816.03.3 2--Safety and Clean-Up . During the cleaning of the existing steel, the
Contractor may encounter hazardous material. The Contractor will be responsible for the health and safety of employees and shall pr ovide such items as protective clothing and respirators and make certain that they are used . The Contractor shall also be responsible for the maintenance and/or replacement of thes e items. The Contractor is advised that safety precautions for workers during each ph ase of work shall be in compliance with present OSHA standards. The Contractor shall take necessary precau tions to prevent an excessive amount of removed materials from falling beneath the structur e. General debris must be confined to the immediate area of the structure. Appropriate measures shall be taken to protect the traveling public during surface preparation and painting operations. The Contractor shall clean the area of ex cessive debris generated from cleaning and properly dispose of it at an approved landfill. The Contractor shall take necessary steps to b ecome familiar with an y applicable Federal, State or local regulations and take the necessary actions for compliance when applicable to any portion of the required work.
816.03.4 Packaging and Marking. Multiple component paints shall be furnished in
premeasured packages so as to form one unit of mixed paint when mixed with the vehicle in its container. The containers for all paints sh all be coated as necessary to prevent attack by the paint. Each container shall bear a label with the following information shown thereon: name and address of manufacturer, trade mark or trade name, kind of paint, date of manufacture and lot number, mixing instructions and equipmen t clean up instructions. The VOC content shall be stated either on the label, product data sheet, or Material Safety Data Sheet.
816.03.5 Acceptance Procedure. Prior to use, the Contractor must furnish the Engineer
a certificate from the manufacturer, covering eac h lot of paint in the shipment, attesting that the paint in the sh ipment conforms to the same formula as that originally approved by the Department. Final acceptance of the paint will be based on results of tests perf ormed by the Central Laboratory on samples obtained by the Department's representative prior to or after delivery. The use of any lot of paint prio r to its final acceptance shall be prohibited.
816.03.6 Mixing, Thin ning and Application. All paint shall be mixed and applied in
accordance with the manufacturer's printed inst ructions. Paint shall be thinned only under conditions that strictly follow th e manufacturer's recommendations. At the Engineer's request, the paint manufactur er's technical representative, who is certified by the National Association of Corrosion Engineers (NACE), shall be present at the job site at the beginning of each separate coating operation to provide technical expertise in the application of the field coats. This technical expertis e shall be prov ided without additional cost to the Department. The Contr actor shall be responsi ble for arranging for the presence of the manufacturer 's technical representative. The Contractor must apply the paint to the We t Film Thickness (WFT) that will obtain the Dry Film Thickness (DFT) required for the film being applied. The DFT required for each paint film of each appr oved coating system is set out in the Department's Approved List of Materials. A subsequent coat shall not be applied until the previous coat has dried thro ughout the film thickness. To secure a maximum coating on edges of pl ates or shapes, rivets, bolt heads and other parts subjected to special wear and attack, th e edges shall be stripped with a longitudinal motion and the rivets and bolt heads with a ro tary motion of a brush followed immediately by general painting of the whole surface, including recoating of the edges, rivets and bolt heads. If, in the opinion of the Engineer, traffic produces an objectionable amount of dust, the Contractor shall, at no additional costs to the State, allay the dust for the necessary distance on each side of the bridge and take any other precautions necessary to prevent dust and dirt from coming in contact with freshly painted surfaces or surfaces prepared for painting. The Contractor shall protect pedestrian, vehicu lar and other traffic upon or underneath the bridge and all portions of the bridge superstructure and substructure against damage or disfigurement by splatte rs, splashes and smirches of pain t or paint material. Any such disfigurement shall be removed at the directi on of and to the satisf action of the Engineer.
816.03.7 Inspection. The Contractor shall measure the paint thickness w ith an elcometer
or other approved magnetic detector thickness gauges. All areas of the finished system deficient in thickness shall be coated over with the finish paint to establish the specified thickness. Excessive thickness in the application of either coating evidenced by mudcracking will be cause for the affected area to be stripped of paint, cleaned and repainted. Where rejection is due to poor workmanship or deficiency in the qu ality of the work or materials, the Contractor may be required to strip the entire defective sections of all previously applied materials an d clean prior to repainting. Inspection shall be done in the presence of and to the satisfaction of the Engineer.
816.04 Method of Measurement. Maintenance painting of structures and members will
be measured by the lump sum or per each as provided in the contract.
816.05 Basis of Payment. Maintenance painting of struct ures and members will be paid
for at the contract unit price per each or lump sum, which price w ill be full compensation for preparation of the surface, for furnishing and applying all materials and for all labor, tools, equipment and incidentals necessary to complete the work. Payment will be made under: 816-A: Maintenance Painting of Metal Structures - lump sum 816-B: Maintenance Painti ng of Metal Structure, Location / Description - per each 816-C: Maintenance Painting of Description - lump sum SECTION 820 - TIMBER STRUCTURES
820.01 Description. This work consists of construc ting timber structures in conformity
with these specifications a nd in accordance with lines, gr ades, dimensions, and details shown on the plans.
820.02 Materials.
820.02.1 Lumber and Timber. Lumber and timber shall conform to the requirements of
Section 718, and in the case of exposed perman ent structures shall be treated as set out therein. Certain portions of un treated timber shall be coated as set out hereinafter and as may be shown on the plans.
820.02.2 Rods, plates, Eyebars, and Shapes . Rods, plates, eyebars, and shapes shall be
of structural steel conforming to the requirements of Section 717.
820.02.3 Castings. Castings shall be cast steel or gr ay-iron, as specified, conforming to
the requirements of Subsections 716.02 or 716.04.
820.02.4 Hardware. Machine bolts, drift bolts, and do wels may be either wrought iron
or medium steel. Washers may be cast ogee or malleable castings, or they may be cut from medium steel or wrought iron plate, as specified. Unless otherwise specified, machine bolts shall have square heads and nuts. Nails shall be cut or round wire of standard form. Spikes shall be cut or wire spikes, or boat spikes, as specified. Nails, spikes, bolts, dowels, washers, and lag screws shall be galvanized unless otherwise specified.