628SECTION 429—BRIDGE DECK W ATERPROOFING MEMBRANE SYSTEMS
429.01 Description
This work shall consist of furnishing and applying waterproofing membrane systems for use on concrete bridge decks that will receive an asphaltic concrete overlay. The work shall include the following items: • Removing existing asphalt concrete overlay • Preparing the bridge deck • Applying primer just prior to placing the membrane • Applying Membrane • Installing Membrane Reinforcement (Type II only) • Installing Protection Board (Type II only) • Applying Tack coat • Placing new asphalt concrete wearing surface
429.02 Types of Waterproofing Membranes
Waterproofing membranes shall consist one of the systems below in accordance with ASTM Standard D6153. The type of system to be used shall be as specified on the Plans or elsewhere in the Contract. Submittals for all systems shall specify their individual components, the individual temperatures and rates of applications for the components, solvents, primers, cure times, etc. for review by the Engineer.
a.Type I – Cold Applied Elastomeric is a cold applied elastomeric membrane system.
b.Type II – Hot Applied Elastomeric is a hot applied elastomeric membrane system.
c.Type III – Preformed Sheet Membrane is a preformed membrane system.
429.03 Materials
Materials specified by the manufacturer of the waterproofing membrane shall prevent the passage of water from the asphalt concrete surface course to or through the bridge deck.
a.Primer shall conform to ASTM D41, Standard Specification for Asphalt Primer used in Roofing, Damp-proofing, and Water-proofing. Primer shall be suitable for use in above or below ground applications.
b.Membrane for Type I systems shall conform to Section 213, and shall consist of cold liquid applied chemically curing membrane materials.
c.Membrane for Type II systems shall conform to Section 213, and shall consist of hot applied elastomeric membrane materials. Material for Type II membrane shall be supplied to the job site in cakes in the manufacturer’ s sealed and labeled containers ready for melting and application.429.01 629(d) Membrane for Type III systems shall conform to Section 213, and shall consist of a preformed membrane system.
e.Membrane Reinforcement for Type II systems shall be spun bonded sheet structure composed of 100% continuous filament polyester fibers bonded together at their crossover points acceptable to the Engineer. The membrane shall be supplied in 18 inch minimum width. The material shall be unaffected by the heat generated by the waterproofing membrane and the hot mix installation. The membrane reinforcement shall conform to ASTM D173, Standard Specification for Bitumen- Saturated Cotton Fabrics Used in Roofing Waterproofing and ASTM D3515 Standard Specifications for Woven Glass Fabric Treated with Asphalt.
f.Membrane Protection Board for Type II systems shall conform to ASTM D6506, Asphalt Based Protection Board for Below-Grade Waterproofing.
g.Tack Coat shall be as recommended by the manufacturer of the membrane system.
h.Asphalt shall conform to ASTM D449 Standard Specification for Asphalt Used in Dampproofing and Waterproofing and Section 211 as applicable
429.04 Equipment
All methods employed in performing the work as well as all equipment, tools, and machinery used for handling and testing the materials and executing any part of the work shall be listed in the submittals. Heating and mixing kettles shall be used in applying Type II Waterproofing Membrane Systems. The kettles shall be of the double boiler oil heat transfer type with a built-in agitator and equipped with two functional permanently installed dial type thermometers, accurate to within ±3.5 degrees F , for measuring the temperature of the melted compound and oil. Equipment used to apply Type II Waterproofing Systems shall also include two separate calibrated thermometers, accurate to within ±3.5 degrees F , to verify the material temperatures on the job site. Air Compressors employed in the work shall provide oil and water free compressed air. The compressed air shall be tested according to ASTM D4285.
429.05 Traffic Restrictions
After shot blasting cleaning operations have commenced, traffic (including mechanical spreaders) shall not be allowed on the cleaned area until after the hot mix binder course has been placed and cooled to ambient temperature. This restriction applies to all traffic other than the construction equipment not directly associated with the waterproofing and paving operations as approved by the manufacturer of the waterproofing membrane and the Engineer. Only vehicles with rubber tires or that have rubber-covered treads will be permitted. Sudden starts, stops, or turns by equipment shall be prevented. If any damage to the waterproofing system is found, the Contractor shall immediately cease all construc - tion operations on the deck, and repair the waterproofing system to the satisfaction of the Engineer and the system manufacturer’ s field representative at no cost to the Department.429.05 630429.06—Procedures
a.Field Representative The Contractor shall furnish the services of the selected waterproofing system manufacturer’ s Field Representative at the work site prior to using any materials. The Field Representative shall have at least five years of demonstrated experience with the installation of waterproofing systems. The representative shall remain on the job site until the work is completed.
b.Submittals The Contractor shall submit the following to the Engineer for review and approval at least two weeks prior to placement of the waterproofing membrane system: • Technical information, including product data sheets, on all materials to be used for the waterproofing system including the primer, membrane, membrane reinforcement, protection board, tack coat, and rubberized asphalt joint sealing compound. • Experience of the Applicator or manufacturer’ s Field Representative. Applicators shall be certified by the system’ s manufacturer. • Documentation indicating that the proposed membrane system contractor or subcontractor is fully qualified to perform the work. Documentation shall demonstrate at least 5 years experience in installing the system proposed for use, including clients, project or work designations, year installed, type and size of installation, and current contact information. • Equipment to be used for the preparation and installation of the waterproofing system. • Equipment that will be permitted atop of the waterproofing system prior to the wearing surface being installed. • Delineate areas where membrane reinforcement will be placed. • Schedule for placement of primer, membrane, protection board, tack coat, and asphalt concrete wearing surface – including multiple day placement of any of the above and/or staged construction. • For Type I and II membranes, application procedures to be taken to ensure the membrane thickness will be as required. How the Contractor will complete the following: o measure the thickness of the waterproofing system as soon as possible after application of the membrane, o steps that will be taken to increase the thickness of the membrane if it is found to be deficient. The Field Representative shall review and approve the Contractor’ s submittal for completeness and accuracy prior to providing the package to the Engineer. The submittal package shall be signed by the manufacturer’ s Field Representative and shall represent the system applicator’ s qualifications and proposed means and methods for successfully performing the work. The Field Representative shall confirm that the proposed membrane applicator is fully qualified to perform the work. The Department will review the submittals in accordance with Section 105.10.429.06 631(c) Placement Meeting and Instructions The Contractor shall hold a Pre-Waterproofing System Placement meeting at least three weeks prior to commencing any waterproofing system installation. The meeting shall include all relevant Contractor staff, the Field Representative, Engineer, and any other significant staff involved in the waterproofing system installation. The Contents of the submittals will also be reviewed during the meeting. This meeting will only be held after the Field Representative has inspected the prepared surface conditions and deemed the surfaces acceptable for placement of the waterproofing system. The Contractor shall complete all repairs to the bridge deck including cracks, spalls and concrete delaminations prior to the Field Representative’ s inspection. The Field Representative shall instruct the Contractor and the Engineer on installation and inspec - tion procedures. For Type I and Type II membranes, the manufacturer’ s instructions shall include membrane thickness measurement procedures to be completed as soon as possible after the membrane is placed. The instructions shall also include procedures for applying additional layers of the membrane if the thickness is deficient in a given location/area without damaging the in place membrane and applicable time constraints.
d.Scheduling When an asphalt overlay is to be removed from an existing concrete structure deck, the Contractor shall inform the Engineer, in writing, at least 7 days prior to his planned work start time and date. Within 24-hours of removal of existing asphalt and at least 14 days prior to waterproofing system installation, the Contractor shall inspect the deck for deterioration and immediately advise the Engineer of any deterioration. All deck deterioration, including cracks, spalls, and delamination, shall be repaired for in accordance with Section 412 prior to placing the membrane. Deck repairs will be measured and paid for in accordance with Section 412. A waterproofing membrane system shall not be placed on new decks until at least 28 days after deck concrete placement unless otherwise directed by the Engineer. The Contractor shall inform the Engineer, in writing, at least 48 hours prior to his planned waterproofing operations start time and date. The Field Representative shall confirm to the Engineer that the deck is in a suitable condition such that waterproofing operations can commence. Waterproofing shall not commence until authorized by the Engineer.
e.Application restrictions The Contractor shall not perform work under wet or damp conditions. The deck surface shall be thoroughly dry at the time of the application of the primer, liquid membrane or preformed membrane. Drying of concrete surfaces shall not be expedited by any means. The Contractor shall not perform work when the deck and ambient air temperatures are below those or will drop below those recommended by the manufacturer. Temperatures shall also be above the dew point. The Contractor shall complete each phase of the bridge deck construction, including placing the surface course overlay, before roadway traffic may be placed on that portion of the bridge structure. 429.06 632Placing membrane system will not be permitted until the adjacent roadway binder course has been completed and is under or ready for traffic. The Contractor shall maintain the condition of the mem - brane system until covered with the asphalt concrete surface course overlay. The Contractor shall protect concrete parapet surfaces and railing, including joint seal armor plates, from splashing, overspray, or tracking of the primer or any component of membrane system. The Contractor shall clean any structure surfaces marred by primer or membrane component material to the satisfaction of the Engineer at no cost to the Department.
f.Deck surface preparation for asphalt concrete overlays New concrete bridge deck surface preparation: The Contractor shall thoroughly clean surfaces where the waterproofing membrane system is to be placed by shot blasting, removing dust, loose or other deleterious material with air jets, vacuum trucks, or other methods approved by the Engineer. Mechanical sweepers and hand brooms will not be permitted. Water shall not be used to clean the deck, except as permitted herein, unless authorized by the Engineer. Deck surfaces shall be free of oil, grease, curing compounds, algae, moss, laitance, friable matter, and bituminous products. Any accumulations of oil or grease shall be cleaned in accordance with ASTM D4258 – Standard Practice for Surface Cleaning of Concrete for Coating using detergent water cleaning. Areas of minor surface deterioration or depressions of 0.5 inch and greater in depth shall be brought to grade with an approved patching mortar. Crack and joints shall be repaired in accordance with Section 412. The Contractor shall remove any sharp concrete protrusions on the deck surface prior to applying the membrane. The Contractor shall air blast clean the surface of the concrete in accordance with ASTM D4259 – Standard Practice for Abrading Concrete and as recommended by the manufacturer of the water - proofing membrane. Cleaned areas shall be primed as soon as they are dry. The Contractor shall blow off dust and dirt with air jets immediately before applying primer. Existing overlaid deck surface preparation: The Contractor shall remove all previous waterproof - ing membranes or bituminous products. All deck repairs shall be completed in accordance with Sec - tion 412 prior to surface preparation. All areas of the concrete deck shall have a flat surface with surface roughness no greater than 0.08 inches. Decks that have a grooved, tined or textured surface shall be bush hammered, ground down or scabbled to reduce the depth of micro texture to 0.08 inches or less prior to abrasive blast cleaning operations. Prior to waterproofing, the Contractor shall treat all concrete surfaces in accordance with new concrete bridge deck surface preparation requirements as described herein. Existing deck joint assembly and deck drain modifications: Modifications to existing expansion joint assemblies and deck drains shall be performed and completed as specified on the Plans or elsewhere in the Contract prior to deck surface preparation and will be paid for accordingly.
g.Primer When instructed or recommended by the manufacturer, the Contractor shall apply a single coat of primer or sealer on all surfaces within 24 hours of the scheduled application of the waterproofing membrane. Any primed or seal coated areas not covered within 24 hours of applying the water - proofing membrane shall be primed or seal coated again at no additional cost to the Department. The primer or seal coat shall be applied when the concrete is surface dry and clean, and the ambient temperature and dew point are above those recommended by the manufacturer.429.06 633The primer or seal coat shall terminate in the chase or, where there is no chase, be extended up the face of the curbs, barrier walls, expansion joints and deck drains to the level of the top of the proposed asphalt concrete overlay. The minimum cure time shall be one hour or as recommended by the manufacturer. The manufac - turer’ s field representative may extend the cure period based on ambient conditions for temperature and relative humidity or the tackiness of the primer or sealer. The primer or seal coat shall not be exposed to construction equipment and activity until it is fully cured and tack free.
h.Waterproofing membrane systems
1.Type I Membrane System Application - Application may proceed while air and substrate temperature are between 32°F and 104°F providing the substrate is above the dew point. Outside of these temperatures, the manufacturer shall be consulted. All components of the system shall be measured, mixed, and applied in accordance with the manufacturer’ s instructions. Prior to the application of any materials, the primed or sealed surface must be clean and free from loose debris, moisture, oil, grease, or other contaminates. The Contractor shall spray apply the waterproofing membrane in two coats with manufacturer approved equipment. The minimum wet film thickness of each coat on any peak shall be in accordance with manufac - turer’ s instructions. The membrane shall be cured between coats and before application of the asphalt tack coat. Waterproofing membrane application shall be continuous once begun. Where the membrane is to be joined to existing cured material and application joints, waterproofing membrane shall be applied to overlap the existing material by at least 6 inches. Overlap area preparation shall be in accordance with the manufacturer’ s instructions. Where the existing materials are covered with a primer or seal coat the overlapped area shall be cleaned with solvent approved by the manufacturer before applying the waterproofing membrane. The waterproofing membrane shall terminate in the chase or, where there is no chase, be extended up the face of curbs, barrier or parapet walls, expansion joints, and deck drains to the level of the top of the proposed asphalt concrete overlay.
2.Type II Membrane Systems Mixing and application of the liquid membrane system shall be performed in accordance with the manufacturer’ s printed instructions and as directed by the Engineer. The Contractor shall apply a surface conditioner evenly to all surfaces at a rate between one gallon per 600 square feet and one gallon per 300 square feet, depending on the condition of the concrete surface as directed by the manufacturer’ s Field Representative. The conditioner shall be allowed to dry before application of the membrane. Cakes of membrane shall be melted on the job site in an approved double walled kettle boiler under continuous mechanical agitation until the material can be drawn from the kettle, free-flowing and lump-free, at a temperature within the range recommended by the manufac - turer but not exceeding 425°F .429.06 634The Contractor shall apply the membrane to the deck surface within the temperature range recommended by the manufacturer. The membrane shall be evenly applied at approximately one pound per square foot to provide a continuous coating with an average thickness of 3/16- inch thick and a minimum thickness of 1/8-inch. The waterproofing membrane shall terminate in the chase or, where there is no chase, be extended up the face of curbs, barrier or parapet walls, expansion joints, and deck drains to the level of the top of the proposed asphalt concrete overlay. Waterproofing membrane application shall be continuous. Where the membrane is to be joined to existing cured material and application joints, waterproofing membrane shall be applied to overlap the existing material by at least 6 inches. Overlap area preparation shall be in accordance with the manufacturer’ s instructions. Where the existing materials are covered with a primer or seal coat, the overlapped area shall be cleaned with solvent approved by the manufacturer before applying the waterproofing membrane.
a.Membrane Reinforcement The Contractor shall place an 18 inch strip of membrane reinforcement centered over joints, construction joints, and wide width cracks and press the membrane reinforcement into the Type II membrane while it is still tacky. The Contractor shall then apply another 3/16 inch thick layer of waterproofing membrane overtop of the membrane reinforcement. The membrane reinforcement shall terminate in the chase or, where there is no chase, be extended up the face of the curbs, barrier walls, expansion joints, and deck drains to the level of the top of the proposed asphalt concrete overlay.
b.Protection board When recommended by the manufacturer, the Contractor shall lay protection boards over the entire waterproofing membrane immediately following application of the membrane and before vehicular or foot traffic is allowed on the membrane. The protection board shall be placed before the surface of the membrane cools and is still tacky. The Contractor shall not apply any material to the waterproofing membrane surface that will remove its tackiness prior to installation of the protection board. Protection boards shall be placed transverse to the centerline of the deck with all edges overlapping 1-inch ±1/4-inch. The protection board edge shall be laid within 1/4-inch of all curbs, vertical faces of drains, and vertical faces of expansion joints. Protection boards shall be placed such that the joints lap in the direction of traffic flow and be staggered a minimum of 6 inches. All protective sheets shall be free of wrinkles, bubbles, fish mouths or other defects to achieve firm and uniform contact. The Contractor shall apply a continuous bead of hot membrane along the joints where the sheets terminate at the face of the curbs.
3.Type III Membrane Systems The Contractor shall prime curb and bridge deck surfaces. Type III membrane shall be applied to the primed curb and deck surfaces by either hand methods or mechanical applicators. The Contractor shall double cover all corners such as at curbs by placing an initial 12-inch minimum 429.06 635width membrane strip along the axis of the corner. Finish inside corners with a fillet, and round outside corners. Double cover areas around drains or other protrusions with a minimum of 6 inches of membrane in each direction then liberally coat with a mastic as approved by the manufacturer. The Contractor shall begin Type III membrane construction at the lowest point of the surface to be waterproofed and apply the membrane to the highest point both longitudinally and transversely. Overlap each membrane strip a minimum of 4 inches in a shingle fashion so that water will run over and not against any laps and will drain toward the curb and the drain pipes unless otherwise approved by the Engineer. The membrane shall extend to the edge of the joint openings. The Contractor shall apply an adhesive or use a wide tipped torch, if necessary, to seal the membrane joints. The Contractor shall install Type III membranes without wrinkles, air bubbles, and other placement defects. Use hand rollers or other satisfactory pressure apparatus on the applied membrane to achieve firm and uniform contact with the primed concrete surfaces. The Contractor shall ensure that the membrane is uniformly and positively adhering to the concrete at the curb faces and drains by performing the work with a manufacturer’ s approved mastic according to the manufacturer’ s instructions. Steel rollers shall not be used unless recommended by the manufacturer. The Contractor shall repair any torn or cut areas or narrow overlaps with the application of an adhesive and membrane patch extending at least 6 inches beyond the defect at no additional cost to the Department. The Contractor shall pave over the membrane from higher to lower elevations.
4.Sample areas When directed by the Engineer, the Contractor shall apply the membrane on a sample area of not less than 10 square feet. Once approved by the Engineer, the sample area shall serve as the standard of acceptance for all membrane work.
5.Patching The Contractor shall repair untreated or damaged areas within the application area. The damaged area shall be cut back to sound material and wiped with a solvent approved by the membrane manufacturer up to a width of at least 6 inches on the periphery, removing primer or tack coat and any contaminants. The substrate shall then be primed, if necessary, followed by the application of membrane. A continuous layer of membrane shall be obtained over the substrate with a 6-inch overlap onto the existing membrane.
6.Final Review The Engineer, the manufacturer’ s Field Representative, and the Contractor shall jointly review the deck area(s) where the completed system has been installed before surfacing or placing protection board. Any irregularities or other conditions which are not in accordance with these specifications or to the manufacturer’ s Representative’ s or Engineer’ s satisfaction shall be addressed before surfacing or placing protection board. Any deficiencies shall be repaired at the expense of the Contractor.429.06 636 7. Protection The Contractor shall protect the membrane from damage by construction operations during all stages of application.
i.Tack Coat The Contractor shall apply a tack coat directly to the waterproofing membrane prior to surfacing. The tack coat shall be supplied by and applied in accordance with the manufacturer’ s instructions.
j.Application of asphalt surface wearing course The Contractor shall place the asphalt concrete wearing surface course overlay as soon as possible after application of the membrane and no later than within 24 hours of the placement of the water - proofing membrane system. Placement shall be in accordance with Section 315, except as modified herein. The asphalt concrete overlay course shall be as specified on the plans. The paving operation shall be in the same direction as the end laps of the Type III membrane. The mixing discharge temperature of the mixture shall not exceed 310 degrees F . The temperature of the mixture at the time of placement shall be not less than 275 degrees F . The mixture shall be dumped directly into the paver hopper. After filling the hopper, the truck shall pull forward and shall not be in contact with the paver while it is moving. The mixture shall not be dumped onto the deck ahead of the paver. The mixture shall be spread and rolled in such a manner that the Protection Board will not be damaged. The temperature of the mixture at the time of rolling and compacting shall be not less than 235 degrees F (200 degrees F for warm mix). Vibratory rollers shall be operated in static mode when used for compaction.
429.07 Quality Control and Quality Assurance and Acceptance of Waterproofing Membrane
Thickness for Type I and Type II Membranes The Contractor shall measure the thickness of membrane using equipment and methods according to the manufacturer’ s instructions. The Field Representative shall perform Quality Control thickness measure - ments of the membrane as the work progresses. The Engineer may directly monitor the Quality Control measurements or may complete independent Quality Assurance thickness measurements. If necessary, the Contractor shall adjust deck preparation, application, or installation operations in coordination with recommendations of the Field Representative to correct deficiencies. The thickness measurement tools used by the Contractor for Quality Control measurements and Quality Assurance measurements shall be calibrated before applying the membrane. Quality Assurance measure - ments will govern over Quality Control measurements, and Quality Control measurements shall govern over the Contractor’ s measurements. Quality Control measurements shall be obtained at a rate of one per each 10-foot by 10-foot section of the deck. Quality Control measurements at each location shall be completed as soon as possible after the membrane is placed and within 30 minutes after the application of the membrane at that location. Whenever Quality Control or Quality Assurance measurements reveal that the membrane thickness is less than the minimum required thickness, the Contractor shall apply another layer of membrane within 429.06 63760 minutes of the previous application of the membrane at that location. Additional layers of membrane shall be applied until Quality Control or Quality Assurance measurements demonstrate that the membrane thickness is equal to or greater than the minimum required thickness. No additional payment will be made for placement of additional layers of the membrane to achieve the required thickness. The Contractor shall provide a daily Quality Control record to the Engineer promptly upon completion of the field measurements. The record shall include the following information: • Date • Time • Weather conditions • Temperature • Thicknesses and location of measurements, and • Any adjustment to application methods, equipment, allowed components, etc. with explanation for adjustment • Any reapplic ation thicknesses and location of measurements
429.08 Waterproofing Membrane Acceptance
During the waterproofing work, field samples of the membrane material shall be taken for testing and evaluation by the Engineer. The Engineer, the Contractor, and the Field Representative shall jointly review the deck area(s) on which the completed system has been installed prior to installation of the asphalt overlay. Any irregularities or other non-permitted variations from these requirements shall be corrected to the satisfaction of the Engineer before acceptance of the work can be authorized.
a.Testing for Type I Membranes: The Contractor shall perform random tensile bond strength tests on the bond between the substrate and the primed concrete surface using an Elcometer Adhesion Tester Model 106 or similar method (VTM 92, ASTM C1573) at a minimum frequency of three tests per 5,000 square feet. Smaller areas shall receive a minimum of three tests. Tensile bond strengths shall provide a tensile rupture strength of the bond interface greater than or equal to 100 psi, or a failure area at a depth of 1/4 inch or more into the base concrete, greater than 50 % of the test area and greater than 290 psi on steel. Additional surface preparation shall be performed as required to achieve passing test results.
b.Testing for Types I, II and III: The Contractor shall determine the waterproofing effectiveness of the membrane pavement system after completion of the asphalt concrete overlay. The minimum electrical resistance shall be 500,000 ohms when tested in accordance with VTM-39. Areas having resistance readings lower than 500,000 ohms will be evaluated by the Department. Those areas determined by the Engineer to be detrimental to the effectiveness of the system shall be repaired by removing the asphalt concrete overlay, replacing or repairing the defective membrane, and replacing the asphalt concrete overlay in a manner that will yield a neat-appearing, smooth-riding pavement at the Contractor’ s expense. If more than 30 percent of the bridge deck area is shown defective by tests and is determined by the Engineer to be detrimental to the effectiveness of the system, the entire asphalt concrete pavement and membrane system shall be removed and the deck cleaned in a satisfactory manner. The entire membrane-pavement system shall then be replaced in accordance with these specifications at the Contractor’ s expense.429.08 638429.09—Measurement and Payment Remove asphalt concrete overlay will be measured and paid for in accordance with Section 425. Bridge deck waterproofing membrane (Type) will be measured in square yards and will be paid for at the contract unit price per square yard of completed surface as shown on the plans for the type specified. This price shall include preparing bridge deck, services of manufacturer’ s field representative, submittals, quality control and quality assurance, testing, and furnishing and placing primer, membrane, and protection board. Allowance shall not be made in the measurement for the turn-up at vertical faces, for any overlap, or for a second application of waterproofing membrane over membrane reinforcement. Membrane reinforcement will be measured in linear feet and will be paid for at the contract unit price per linear foot. Allowance will not be made in the measurement for the turn-up at vertical faces or for any overlap. Payment will be made under: ——————————————————————————————Pay Item Pay Unit——————————————————————————————Bridge deck waterproofing membrane (Type) Square yard Membrane reinforcement Linear Foot—————————————————————————————— SECTION 430—NBIS INSPECTION USING UNDER BRIDGE INSPECTION DEVICE
430.01 Description
This work shall consist of furnishing an OSHA compliant under bridge inspection device, including qualified operator, to facilitate the inspection of bridge structures by Department inspectors or designated consultant inspectors prior to opening such bridge structures or partial bridge structures, based on phase construction, to public traffic. The under bridge inspection device shall be of sufficient size, capacity, and reach to provide access to all areas of the specified bridge structure(s) or partial bridge structure(s) for inspection purposes. The Contractor shall provide VDOT inspectors full access to bridge structures for the National Bridge Inspection Standards (NBIS) bridge initial/inventory and/or final acceptance inspection before the bridge structure(s) or partial bridge structure(s) is opened to public traffic.
430.02 Notification Requirements
The Contractor shall notify the Engineer at least 1 month (30 days) in advance of his requested NBIS inspection date to arrange for NBIS inspection of the completed bridge structure(s) or completed partial bridge structures. If the Department is able to arrange to supply it’ s under bridge inspection device once the request for the NBIS inspection is received from the Contractor, the Contractor will be notified by the Engineer and payment for days/partial days not used will be deleted from the Contract. Advance notice and coordination by each party in scheduling mutually agreeable date(s) and time(s) for NBIS inspection is required due to bridge inspection device and personnel availability as well as associated costs.429.09
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 656–665 of 1,065.